19-1414; Rev 0; 1/99 MA AXILM Fault-Protected, High-Voltage Single 8-to-1/Dual 4-to-1 Multiplexers General Description The MAX4508/MAX4509 are 8-to-1 and dual 4-to-1 fault- protected multiplexers that are pin-compatible with the industry-standard DG508/DG509. The MAX4508/ MAX4509 operate with dual supplies of +4.5V to 20V or a single supply of +9V to +36V. These multiplexers fea- ture fault-protected inputs, Rail-to-Rail signal handling capability, and overvoltage clamping at 150mV beyond the rails. Both parts offer +40V overvoltage protection with sup- plies off and +25V protection with supplies on. On- resistance is 400Q max and is matched between channels to 15Qmax. All digital inputs have TTL logic thresholds, ensuring both TTL and CMOS logic com- patibility when using a single +12V supply or dual +15V supplies. Applications Data-Acquisition Systems Industrial and Process Control Avionics Signal Routing Redundant/Backup Systems Functional Diagrams/Truth Tables appear at end of data sheet. Features # +40V Fault Protection with Power Off +25V Fault Protection with +15V Supplies Rail-to-Rail Signal Handling # No Power-Supply Sequencing Required All Channels Off with Power Off # Output Clamped to Appropriate Supply Voltage During Fault Condition # 1kQ Output Clamp Resistance During Overvoltage # 400<max On-Resistance # 20ns Fault-Response Time @ +4.5V to +20V Dual Supplies +9V to +36V Single Supply # TTL/CMOS-Compatible Logic Inputs Ordering Information PART TEMP. RANGE PIN-PACKAGE MAX4508CAE 0C to +70C 16 SSOP MAX4508CSE 0C to +70C 16 Narrow SO MAX4508CPE 0C to +70C 16 Plastic DIP MAX4508C/D 0C to +70C Dice* MAX4508EAE -40C to +85C 16 SSOP MAX4508ESE -40C to +85C 16 Narrow SO MAX4508EPE -40C to +85C 16 Plastic DIP MAX4508MJE -55C to +125C 16 CERDIP* Ordering Information continued at end of data sheet. *Contact factory for dice specifications. Contact factory for availability. Pin Configurations/Functional Diagrams MAAXIMA MAXx4508 Oo wo [1] 16] At aN [2b 5] 2 V- [3] LOGIC 14] GND NOt Re te V+ Noo [5 Phe pe 4 fia] os veo [Bf fo AT] ns Nod [7 }#So4 0 Tit] Nor com [a oA 9 | Now SSOP/SO/DIP TOP VIEW MAXIAA MAX4509 WO wo [1 16] At EN [2 | 115] GND V- [3 | 14] V+ Nota [4 | 13] NO1B noza [5 | 2] Noes Nosa [6 | 11] No3B Nosa [7 | [10] No4B Coma [o | 9 | COMB SSOP/SO/DIP Rail-to-Rail is a registered trademark of Nippon Motorola, Lid. MAKI Maxim Integrated Producis 1 For free samples & the latest literature: http:/www.maxim-ic.com, or phone 1-800-998-8800. For small orders, phone 1-800-835-8769. 60SVXVW/80S~VXVNMAX4508/MAX4509 Fault-Protected, High-Voltage Single 8-to-1/Dual 4-to-1 Multiplexers ABSOLUTE MAXIMUM RATINGS (Voltages Referenced to GND) Vo cccscsesssssssssseeesssevesseseesssesseesessesseesetsessietsaseeeten -0.3V to +44.0V Ve cocssssesssssssetssevessssecsssesesssseeesssseseesiseesseesssneeeten -44.0V to +0.3V Vat tO Vosscccccssssseesssstecssseeesseseeesssseetsssestessiesssseeeten -0.3V to +44.0V COM_, A_(Note 1). .. (Vt + 0.3V) to (V- - 0.3V) NO evcccesssscesssseesssseeessssveesesseesessseesssseeesen (V+ - 40V) to (V- + 40V) NO_t0 COM... eee eee nee eeeneeeetnieee -36V to +36V NO_ Overvoltage with Switch Power On....... ... 80V to +30V NO_ Overvoltage with Switch Power Off.... -40V to +40V Continuous Current into Any Terminal. .....0...00.. ee +30mA Peak Current, Into Any Terminal (pulsed at 1ms, 10% duty cycle)... eee +100mA Continuous Power Dissipation (Ta = +70C) 16 SSOP (derate 8.70mMW/C above +70C) ...... 667mW 16 Narrow SO (derate 8.70mMW/C above +70C) ........ 471mW 16-Pin Plastic DIP (derate 10.53mW/C above +70C) 842mW 16-Pin CERDIP (derate 10.00mW/C above +70C).....800mMW Operating Temperature Ranges MAX4508C_ E/MAX4509C_E..w.. ee 0C to +70C MAX4508E_E/MAX4509E _E... ..-40C to +85C MAX4508MJE/MAX4509MUJE... ve -55C to +125C Storage Temperature Range ......... ee -65C to +160C Lead Temperature (soldering, 10sec)... ee +300C Note 1: COM_, EN, and A_pins are not fault protected. Signals on COM_, EN, or A_ exceeding V+ or V- are clamped by internal diodes. Limit forward diode current to maximum current rating. Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICSDual Supplies (V+ = +15V, V- = -15V, VA_H =4+2.4V, VA | = +0.8V, VEN = +2.4V, Ta = TMIN to TMAX, unless otherwise noted. Typical values are at Ta = +25C.) (Note 2) PARAMETER | SYMBOL | CONDITIONS TA MIN TYP MAX | UNITS ANALOG SWITCH (Notes 3.4) Signal Range VNO_ Vhoe wee = -15V, CEM Ve Vi Vv +25C 300 400 On-Resistance RON Vcom_ = 10V, INo_ = 0.2mA C,E 500 Q M 700 . +25C 15 Channels (Note 5) Between | ARon | Voom =+#10V, INO. =0.2mA CE 20 Q M 25 +25C -0.5 0.5 NO_ Off-Leakage Current INO (OFA | Vo = #10V, Voom, = F10V CE 5 5 nA (Note 6) s 7 %o 5 +25C -2 2 MAX4508 C,E -20 20 COM_Off-Leakage Current Ico (OFA Vcom_= +10V, M -200 200 nA (Note 6) - VNo_ = 10V, +25C -1 1 MAX4509 C,E -10 10 M -100 100 +25C -2 2 MAX4508 C,E -25 25 COM_On-Leakage Current ICOM (ON) Veo tover M -300 300 nA (Note 6) floating +25C -1 1 MAX4509 C,E -15 15 M -150 150 2 MAXIMFault-Protected, High-Voltage Single 8-to-1/Dual 4-to-1 Multiplexers ELECTRICAL CHARACTERISTICS--Dual Supplies (continued) (V+ = +15V, V- = -15V, VA _H = +2.4V, Va _L = +0.8V, VEN = +2.4V, Ta = TMIN to TMAX, unless otherwise noted. Typical values are at Ta = +25C.) (Note 2) PARAMETER | SYMBOL | CONDITIONS | Ta | MIN TYP MAX | UNITS FAULT PROTECTION - i Applies with power on, Figure 9 -25 25 Fault-Protected Analog Signal VNO pp p 9 425C V Range (Notes 3, 4) | Applies with power off -40 40 +25C -10 10 A COM_ Output Leakage Current, _ _ n Supplies On ICOM __ VnNo_= 25V, Ven = 0 C,E 20 20 M -100 100 pA +25C -20 20 A NO_ Input Leakage Current, Vno_= 25V, Vcom_ = 10V, n Supplies On INO_ VEN = 0 CE 200 200 M -50 50 pA +25C -20 20 nA NO_ Input Leakage Current, Vno_= +40V, Voom = 0, 7 Supplies Off INO. | V4=0, v-=0 CE . . yA M -100 100 COM_On Clamp Output _ VNo_= 25V 5 7 10 13 Current, Supplies On Icom_ | Vcom= 0 VNo = -25V 425C -13 -11 -7 mA COM_On Clamp Output _ Resistance, Supplies On Rcom_ | Vno_ = +25V +25C 100 1.0 2.5 kQ + Fault Output Clamp Turn-On _ _ 6 Delay (Note 4) RL= 10k, VNo_ = +25V +25C 20 ns + Fault Recovery Time (Note 4) RL = 10kQ, VNo_ = +25V +25C 2.5 ys LOGIC INPUT A_ Input Logic Threshold High VAH c,E,M 2.4 Vv A_ Input Logic Threshold Low VAL Cc,E,M 0.8 Vv A_ Input Current Logic _ . High or Low lIAH, IAL] Va = 0.8Vor2.4V c,E,M 1 1 pA SWITCH DYNAMIC CHARACTERISTICS +25C 160 275 _ . Vno_ = +10V, RL = 1kQ, Enable Turn-On Time TON Figures 2 and 3 C,E 400 ns M 600 T ition Ti tr Fi 5 +25C 170 350 ransition Time igure ns RANS | "9 CEM 500 +25C 120 200 _ . Vno_ = +10V, RL = 1kQ, Enable Turn-Off Time tOFF Figures 2 and 3 CLE 250 ns M 400 Break-Before-Make Time Delay Vno_ = +10V, RL = 1kQ, (Note 4) BBM Figure 4 c,E,M 10 80 ns Charge Injection CL=1.0nF, VNo_= 0, Rs=0, (Note 4) Q Figure 5 425C 2 10 pc Off-lsolation RL = 75, C_= 15pF, 6 - (Note 7) Viso VNo_ = 1Vams, f= 1MHz, Figure 6 425C 70 dB MA AXIM 3 60SVXVW/80S~VXVNFault-Protected, High-Voltage Single 8-to-1/Dual 4-to-1 Multiplexers ELECTRICAL CHARACTERISTICSDual Supplies (continued) (V+ = +15V, V- = -15V, VA_H = +2.4V, Va _L = +0.8V, VEN = +2.4V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at Ta = +25C.) (Note 2) MAX4508/MAX4509 PARAMETER SYMBOL CONDITIONS Ta MIN TYP MAX | UNITS Channel-to-Channel Crosstalk RL= 75Q, CL = 15pF, . (Note 8) VeT | VNo_= 1VaMs. t= 1MHz, Figure7| * 62 dB NO_ Off-Capacitance Cn_(OFF) | f= 1MHz, Figure 8 +25C 10 pF COM_ Off-C. it Cc f = 1MHz, Fi 8 MAXA508 25C 19 F -Capacitance = z, Figure + - P COM (OF) 9 MAX4509 14 P COM_ On-C. it Co f = 1MHz, Fi 8 MAXA508 25C 28 F n-Capacitance = z, Figure + - P OM_(ON) 9 MAX4509 22 P POWER SUPPLY Power-Supply Range V+, V- c,E,M +4.5 +20 Vv +25C 370 500 All Va_= 0 or 5V, V+ Supply Current I+ VNO = 0, Ven = 5V C,E 600 pA M 800 +25C 200 300 All Va_ = O or 5V, V- Supply Current - VNO = 0, Ven = 5V C,E 400 pA M 500 All Va_= 0 or 5V, +25C 200 300 GND Supply Current IGND VNO_ = 0, VEN = 5V CEM 500 pA ELECTRICAL CHARACTERISTICSSingle +12V Supply (V+ = +12V, V- = 0, VA H = +2.4V, VAL = +0.8V, VEN = +2.4V, Ta = TMIN to TMAx, unless otherwise noted. Typical values are at Ta = +25C.) (Note 2) PARAMETER | SYMBOL | CONDITIONS | Ta | MIN TYP = MAX | UNITS ANALOG SWITCH (Note 3) Analog Signal Range VNO_ Veo 13v =0, CEM 0 Ve Vv +25C 650 950 On-Resistance RON Vcom_ = +10V, INo_ = 200pA C,E 1100 Q M 1300 +25C 10 25 Channels (Note 5) Between | ARon | Voom = 10V, Ino. = 200pA CE 50 Q M 75 +25C -0.5 0.01 0.5 (Noles 6.9) Current INO_(OFF) oes vi0 \ V; CE 10 10 nA ~ M -200 200 4 MAXIMAFault-Protected, High-Voltage Single 8-to-1/Dual 4-to-1 Multiplexers ELECTRICAL CHARACTERISTICSSingle +12V Supply (continued) (V+ = +12V, V- = 0, VA H = +2.4V, VAL = +0.8V, VEN = +2.4V, Ta = TMIN to TMAx, unless otherwise noted. Typical values are at Ta = +25C.) (Note 2) PARAMETER SYMBOL CONDITIONS Ta MIN TYP MAX | UNITS +25C -2 2 MAX4508 C,E -20 20 COM_ Off-Leakage Current Vcom_ = 10V, 1V; M -200 200 nA (Note 6) COM(OFF)) Vig = 1V, 10V 25C 4 1 ) + MAX4509 C,E -10 10 M -100 100 +25C -2 2 MAX4508 C,E -25 25 COM_On-Leakage Current , yCOM 7 On wy M -300 300 A (Note 6) COM_(ON) | SNO_ = 10M, IM, OF 25C 4 1 " floating + MAX4509 C,E -15 15 M -150 150 FAULT PROTECTION Fault-Protected Analog Signal Vno Applies with all power on 425C -25 25 Vv Range (Notes 3, 10) | Applies with all power off -40 40 +25C -20 20 nA COM_ Output Leakage Current, _ _ Supply On (Notes 3, 10) ICOM __ Vno_=+25V, V+ = 12V CLE 20 20 UA M -100 100 +25C -20 20 nA NO_ Input Leakage Current, | Vno_= +25V, Vcom_ = 0, CE 5 5 Supply On (Notes 3, 10) NO_ | v4 = 12V yA M -100 100 +25C -20 0.1 20 nA NO_ Input Leakage Current, _ _ _ Supply Off (Notes 3, 10) INO_ Vno_= 40V, V+ = 0, V-=0 C,E 5 5 vA M -100 100 COM_ON Output Current, _ _ Supply On Icom. | VNO_ = 25V, V+ = 12V +25C 2 3 5 mA COM_ON Output Resistance, _ _ Supply On Rcom_ | VNo_ = 25V, V+ = 12V +25C 2.4 6 kQ LOGIC INPUT A_ Input Logic Threshold High VIN_H Cc,E,M 1.8 2.4 Vv A_ Input Logic Threshold Low VIN_L Cc,E,M 0.8 1.8 Vv A_Input Current Logic INH > | Win = 0.8Vor2.4V CEM 4 0.03 1 yA High or Low IINL_ _ . >, . MA AXIM 5 60SVXVW/80S~VXVNFault-Protected, High-Voltage Single 8-to-1/Dual 4-to-1 Multiplexers ELECTRICAL CHARACTERISTICSSingle +12V Supply (continued) (V+ = +12V, V- = 0, VA H = +2.4V, VAL = +0.8V, VEN = +2.4V, Ta = TMIN to TMAx, unless otherwise noted. Typical values are at Ta = +25C.) (Note 2) PARAMETER | SYMBOL | CONDITIONS | Ta | MIN TYP MAX | UNITS SWITCH DYNAMIC CHARACTERISTICS MAX4508/MAX4509 = = 25C 220 500 Enable Turn-On Time ton Vcom_= TOV, RL = 2k22, + ns Figure 3 C,E,M 700 = = 25C 100 250 Enable Turn-Off Time tOFF Vcom_= TOV, RL = 2k22, + ns Figure 3 C,E,M 350 Break-Before-Make Time Delay Vcom_ = 10V, RL = 2kQ, (Note 4) tBBM Figure 4 +25C 50 100 ns Charge Injection C_ = 1.0nF, VNo_=0, Rs =0, (Note 4) Q Figure 5 425C 2 10 pc NO_ Off-Capacitance CNo_(OFF)} VNO_ = 0, f = 1MHz, Figure 8 +25C 10 pF COM_ Off-Capacitance Coom_(oFF)| Vcom_= 0, f = 1MHz, Figure 8 +25C 19 pF - i Vcom_= VNo_ = 0, f= 1MHz, 5 COM_On-Capacitance Ccom_(ON) Figure 8 +25C 28 pF Off-lsolation RL = 75Q, CL = 15pF, - (Note 7) ViSO | Vo = 1VaMs,f= 1MHz, Figures] *2 70 dB Channel-to-Channel Crosstalk RL = 75Q, CL = 15pF, . (Note 8) Vet VNo_= 1Vams, f= 1MHz, Figure 7 425C 62 dB POWER SUPPLY Power-Supply Range V+ C,E,M 9 36 Vv All Va_= 0 or 5V, +25C 200 300 V+ Supply Current I+ VNo. = 0, VEN = 5V CEM 450 pA All Va_= 0 or 5V, +25C 150 250 V- and GND Supply Current WNO_= 0, VEN = +8 CEM 375 A -an u urren ppl GND +25C 250 400 i. All Va =Oor5V c,E,M 600 Note 2: The algebraic convention is used in this data sheet; the most negative value is shown in the minimum column. Note 3: NO_pins are fault protected and COM_pins are not fault protected. The max input voltage on NO_ pins depends on the COM_load configuration. Generally the max input voltage is +36V with +15V supplies and a load referred to ground. For more detailed information refer to NO_ Input Voltage section. Note 4: Guaranteed by design. Note 5: ARON = Ron(MAx) - RON(MIN)- Note 6: Leakage parameters are 100% tested at the maximum rated hot temperature and guaranteed by correlation at Ta = +25C. Note 7: Off-isolation = 20log19 (Vcom_/ VNo_), where Vcom_ = output and VNo_= input to off switch. Note 8: Between any two analog inputs. Note 9: Leakage testing for single-supply operation is guaranteed by testing with dual supplies. Note 10: Guaranteed by testing with dual supplies. 6 MAXIMAFault-Protected, High-Voltage Single 8-to-1/Dual 4-to-1 Multiplexers Typical Operating Characteristics (V+ = +15V, V- = -15V, VEN = +2.4V, Ta = +25C, unless otherwise noted.) ON-RESISTANCE vs. ON-RESISTANCE vs. ON-RESISTANCE vs. Vcom AND Vcom (DUAL SUPPLIES) Voom (SINGLE SUPPLY) TEMPERATURE (DUAL SUPPLIES) 1000 1100 x 600 = g V4 =415V 900 Ve cad BV 4000 : ye a 1BV 500 800 Ve =-4.5V 900 2 4125C ! 700 300 to 485C = 0 = 700 s = V4 = +15V & 600 a 500 & V- =-15V & 500 & 800 400 400 200 300 300 a0 V4 = 420V 200 100 400 V- = -20V 400 0 0 0 20-145 -10 -5 0 5 10 15 2 0 5 10 15 2 25 30 35 40 - Voom (V) Veow (V) Voom (V) ON-RESISTANCE vs. Vcom AND TEMPERATURE (SINGLE SUPPLY) LEAKAGE CURRENT vs. TEMPERATURE CHARGE INJECTION vs. Vcow 4000 tp 2 25 T g Va =412V Ve = H15V g Ve = H15V & 900 FV. =0 +125C Ve = -15V & \e = -15V 3 100n 8 8 800 Voom = #10V 3 20 FS 2 Vo = HOV 700 +85'C ton FN | \ aq 600 425C = in ICOM_OFF. _ 15 Noval gS 3 | g Xs PPLIES B 500 S = / 400 1009 FF IcoM on 1.0 N 300 10p / 200 INO_OFF 05 A+} 100 tp SF SINGLE SUPPLY 0 0.1p 0 i 0 2 4 6 8 10 12 44 55-30 -5 20 45 70 95 120 145 15-10 -5 0 5 10 15 Voom (V) TEMPERATURE (C) Vcom (V) ENABLE ON AND OFF TIMES vs. ENABLE ON AND OFF TIMES vs. ENABLE ON AND OFF TIMES SUPPLY VOLTAGE (DUAL SUPPLIES) SUPPLY VOLTAGE (SINGLE SUPPLY) vs. TEMPERATURE 300 300 , 2 Vo. = HOV Vo_ = +10V Ves +15V g ) ~ V- =-15V 2 700 960 ma i 600 _ 200 = z 500 z z ton | E400 s & 150 a = z Zz (| 6 = & 5S 300 400 t a OFF Laeanamennrn | aneoeeeaen) 200 a 50 400 0 0 0 42 +4 46 48 +10 +12 414 416 418 420 0 5 10 1 20 2 30 35 55-25 5 3 65H 185 SUPPLY VOLTAGE (V) SUPPLY VOLTAGE (V) TEMPERATURE (C) MAXIM 7 60SVXVW/80S~VXVNMAX4508/MAX4509 wwe me wee wy eee Guaranteed by Design Fault-Protected, Hig h-Voltage Single 8-to-1/Dual 4-to-1 Multiplexers (V+ = +15V, V- = -15V, VEN = +2.4V, Ta = +25C, unless otherwise noted.) POWER-SUPPLY CURRENT vs. TEMPERATURE (Va = 0) 300 1. V4=4t5V [8 vet | 200 a veo. Le le A= s Pel @ 100 a g lenp \ = -100 Lr | -200 LA -300 55-30 -5 20 45 70 95 120 145 TEMPERATURE (C) LOGIC-LEVEL THRESHOLD vs. SUPPLY VOLTAGE 3.0 a V- =GND 4 5 aM 8 25 7 = = z 3 DUAL a WA 2 20 SUPPLIES ra LAT Snate f | Hae SUPPLY a? oY q S 1.0 g 05 0 0 5 10 15 2 2 30 35 40 SUPPLY VOLTAGE (V) FAULT-FREE SIGNAL PERFORM ANCE +15V E 5 IN. : e ov i 10Vidiv : ~15V : +18V oe COM oy feee[reedeeefelrdhes dees feeteeefees tovidv Boho ledeefeen -15V 5usidiv FAULT-FREE RAIL-TO-RAIL SIGNAL HANDLING WITH 415V SUPPLIES LOSS (dB) COM_ SUPPLY CURRENT I+, I-, Ignp (uA) Typical Operating Characteristics (continued) POWER: SUPPLY CURRENT vs. TEMPERATURE (Va = +5V) Q So 3 ~~ ve=4t5v [e oe, v-=-15V |8 400 + Va = 45V TE pon YAH H = ~~~, 200 lend 0 200 [ Ly] -400 I a Le] | -600 -60 -40 -20 0 20 40 60 80 100 120 140 TEMPERATURE (C) FREQUENCY RESPONSE 20 ~ V4 = +15V 8 Ve =-15V g 0 ST 2 TE ct il -20 -40 CROSSTALK oA -60 Wit OFF-ISOLATION Ha At -80 a -100 0.001 001 Of 100 1000 FRECUENGY (M ho INPUT OVERVOLTAGE vs. OUTPUT CLAMPING 425V 8 ee tard = ov +15V -25Y ov ov -45V 5ys/div 425V OVERVOLTAGE INPUT WITH THE OUTPUT CLAMPED AT #15V MAXIMAFault-Protected, High-Voltage Single 8-to-1/Dual 4-to-1 Multiplexers Pin Descriptions MAX4508 (Single 8-to-1 Mux) MAX4509 (Dual 4-to-1 Mux) PIN NAME FUNCTION PIN NAME FUNCTION 1 AO Address Bit 0 1 AO Address Bit 0 2 EN Mux Enable 2 EN Mux Enable 3 V- Negative Supply Voltage 3 V- Negative Supply Voltage 4 NO1 Channel Input 1 4 NO1A Channel Input 1A 5 NO2 Channel Input 2 5 NO2A Channel Input 2A 6 NO3 Channel Input 3 6 NO3A Channel Input 3A 7 NO4 Channel Input 4 7 NO4A Channel Input 4A 8 COM Analog Output 8 COMA Mux Output A 9 NO8 Channel Input 8 9 COMB Mux Output B 10 NO7 Channel Input 7 10 NO4B Channel Input 4B 11 NO6 Channel Input 6 11 NO3B Channel Input 3B 12 NO5 Channel Input 5 12 NO2B Channel Input 2B 13 V+ Positive Supply Voltage 13 NO1B Channel Input 1B 14 GND Ground 14 V+ Positive Supply Voltage 15 A2 Address Bit 2 15 GND Ground 16 Al Address Bit 1 16 Al Address Bit 1 Truth Tables MAX4508 (Single 8-to-1 Mux) Detailed Description A2 Al AO EN ON SWITCH x x x 0 None 0 0 0 1 NO1 0 0 1 1 NO2 0 1 0 1 NO3 0 1 1 1 NO4 1 0 0 1 NO5 1 0 1 1 NO6 1 1 0 1 NO7 1 1 1 1 NO8 MAX4509 (Dual 4-to-1 Mux) Al AO EN COMA COMB x x 0 None None 0 0 1 NO1A NO1B 0 1 1 NO2A NO2B 1 0 1 NO3A NO3B 1 1 1 NO4A NO4B MAXIM Traditional fault-protected multiplexers are constructed with three series FET switches. This produces good off protection, but limits the switches input voltage range to as much as 3V below the supply rails, reducing its usable dynamic range. As the voltage on one side of the switch approaches within about 3V of either supply rail (a fault condition), the switch impedance increases, limiting the output signal range to approximately 3V less than the appropriate polarity supply voltage. The MAX4508/MAX4509 differ considerably from tradi- tional fault-protected multiplexers, offering several advantages. First, they are constructed with two paral- lel FETs, allowing very low resistance when the switch is on. Second, they allow signals on the NO__ pins that are within or beyond the supply rails to be passed through the switch to the COM terminal. This allows rail- to-rail signal operation. Third, when a signal VNO_ exceeds the supply rails (i.e., a fault condition), the voltage on COM_ is limited to the supply rails. Operation is identical for both fault polarities. 60SVXVW/80S~VXVNMAX4508/MAX4509 Fault-Protected, High-Voltage Single 8-to-1/Dual 4-to-1 Multiplexers MAAXIM NORMALLY OPEN SWITCH CONSTRUCTION | VE ee * MAX4509 P2 A HIGH > * FAULT , 5 Pi NO_ COM Nt ~ LOW t - FAULT oo a8 dq A I : ~ A qd GWD t ) | a \. 4 __ * we L ESO CODE Lo Figure 1. Functional Diagram When the NO_ voltage goes beyond supply rails (fault condition), the NO_ input becomes high impedance regardless of the switch state or load resistance. When power is removed, and the fault protection is still in effect, the NO_ terminals are a virtual open circuit. The fault can be up to +40V, with V+ = V- = 0. If the switch is on, the COM_ output current is furnished from the V+ or V- pin by booster FETs connected to each supply pin. These FETs can source or sink up to 10mA. The COM_ pins are not fault protected. If a voltage source is connected to any COM_ pin, it should be lim- ited to the supply voltages. Exceeding the supply volt- age will cause high currents to flow through the ESD protection diodes, damaging the device (see Absolute Maximum Ratings). Figure 1 shows the internal construction, with the ana- log signal paths shown in bold. A single normally open (NO) switch is shown. The analog switch is formed by the parallel combination of N-channel FET N1 and P- channel FET P1 which are driven on and off simultane- 10 ously, according to the input fault condition and the logic level state. NO_Input Voltage The maximum allowable input voltage for safe opera- tion depends on whether supplies are on or off and the load configuration at the COM output. If COM is re- ferred to a voltage other than ground, but within the supplies, VNO_ may range higher or lower than the sup- plies provided the absolute value of |VNO_ - Vcom | is less than 40V. For example, if the load is referred to +10V at COM_, then the NO_ voltage range can be from +50V to -30V. As another example, if the load is connected to -10V at COM_, the NO_ voltage range is limited to -50V to +30V. If the supplies are +15V and COM is referenced to ground through a load, the maximum NO_ voltage is +25V. If the supplies are off and the COM output is ref- erenced to ground, the maximum NO_ voltage is +40V. MAXIMAFault-Protected, High-Voltage Single 8-to-1/Dual 4-to-1 Multiplexers Normal Operation Two comparators continuously compare the voltage on the NO_ pin with V+ and V- supply voltages. When the signal on NO_ is between V+ and V-, the multiplexer behaves normally, with FETs N1 and P1 turning on and off in response to A_ signals (Figure 1). The parallel combination of N1 and P1 forms a low-value resistor between NO_ and COM_ so that signals pass equally well in either direction. Positive Fault Condition When the signal on NO_ exceeds V+ by about 150mV, the positive fault comparator output goes high, turning off FETs N1 and P1 (Figure 1). This makes the NO_ pin high impedance, regardless of the switch state. If the switch state is off, all FETs turn off, and both NO_ and COM_ are high impedance. If the switch state is on, FET P2 turns on, clamping COM_to V+. Negative Fault Condition When the signal on NO_ goes about 150mV below V-, the negative fault comparator output goes high, turning off FETs N1 and P1 (Figure 1). This makes the NO_ pin high impedance, regardless of the switch state. If the switch state is off, all FETs turn off, and both NO_ and COM_ are high impedance. If the switch state is on, FET N2 turns on, clamping COM_ to V-. Transient Fault Condition When a fast rising or falling transient on NO_ exceeds V+ or V-, the output (COM_) follows the input (NO_) to the supply rail with only a few nanoseconds delay. This delay is due to the switch on-resistance and circuit capacitance to ground. When the input transient returns to within the supply rails, however, there is a longer output recovery time. For positive faults, the recovery time is typically 2.5us (see Typical Operating Characteristics). For negative faults, the recovery time is typically 1.3ys. These values depend on the COM_ output resistance and capacitance. The delays do not depend on the fault amplitude. Higher COM_ output resistance and capacitance increase the recovery times. COM and A_ FETs N2 and P2 can source about +10mA from V+ or V- to the COM_ pin in the fault condition (Figure 1). Ensure that if the COM_ pin is connected to a low- impedance load, the absolute maximum current rating of 30mA is never exceeded, either in normal or fault conditions. MA AXIM The GND, COM_, and A_ pins do not have fault protec- tion. Reverse ESD protection diodes are internally con- nected between GND, COM_, A_, and both V+ and V-. If a signal on GND, COM_, or A_ exceeds V+ or V- by more than 300mV, one of these diodes will conduct. During normal operation, these reverse-biased ESD diodes leak a few nanoamps of current to V+ and V- Fault Protection Voltage and Power Off The maximum fault voltage on the NO_ pins is +40V from ground when the power is off. With +15V supply voltages, the highest voltage on NO_ can be V- + 40V, and the lowest voltage on NO can be V+ - 40V. Exceeding these limits can damage the chip. Logic Level Thresholds The logic level thresholds are CMOS and TTL compati- ble with V+ = 13.5V to V+ = 16.5V. Applications Information Ground There is no connection between the analog signal paths and GND. The analog signal paths consist of an N-channel and a P-channel MOSFET with their sources and drains paralleled and their gates driven out of phase to V+ and V- by the logic-level translators. V+ and GND power the internal logic and logic level translators and set the input logic thresholds. The logic- level translators convert the logic levels to switched V+ and V- signals to drive the gates of the multiplexers. This drive signal is the only connection between the power supplies and the analog signals. GND, A_, and COM_ have ESD protection diodes to V+ and V-. Supply Current Reduction When the logic signals are driven rail-to-rail from 0 to +15V or -15V to +15V, the current consumption will be reduced from 370A (typ) to 200A. Power Supplies The MAX4508/MAX4509 operate with bipolar supplies between +4.5V and +20V. The V+ and V- supplies need not be symmetrical, but their sum cannot exceed the 44V absolute maximum rating. The MAX4508/MAX4509 operate from single supplies between +9V and +36V when V- is connected to GND. 11 60SVXVW/80S~VXVNMAX4508/MAX4509 Fault-Protected, High -Voltage Single 8-to-1/Dual 4-to- 1 Multiplexers Test Circuits/Timing Diagrams +1V V+ f2 NOt +0V A NC2-NO? - A AAAXLA = MAX4508 Nog ;- _-1ov te<20 INS AVI com LOGIC 43V te o0ns Vout INPUT 5 F GND V- V 502 TL | Kk T S5pF AL ov => = 15 = = Vnot +15V SWITCH i OUTPUT 7m Al NOIB stOV Vout ov AO NOTA-NO4A - VNeos MAXI = NO4B - -10v = MAX4509 TTRANS pom tTRANS 42.4V oe ON Vout GND 3002 T S5pF Figure 2. Address Transition Time +15V | Vv V+ BEN NOt +10V NO2-NC8 Fq _ AO ANAXIAM = At MAX4508 A2 COM ta <20ns GND \- Vout Logic = 8V tp < 20ns 50Q 35pF INPUT tk VN ov i = = 45V i tontEN) torF(EN) +15V ov Vj 1 SWITCH NY EN + NOIB HOV OUTPUT NO1A-NO4A Vout NC2B-NO4B, _ AO COMA, MAAXLAA MAX4509 Vout At COMB 50Q GND T * 35pF Figure 3. Enable Switching Time 12 MAXIMAFault-Protected, High-Voltage Single 8-to-1/Dual 4-to-1 Multiplexers Test Circuits/Timing Diagrams (continued) GND Ll = 1V +15V ay OY ey ty <20ns toac #V te<20ns INPUT 50% NO1-NO8 +10V Va ov n) AAAXIM MAX4508 At +5V Va tb 80% SWITCH COM Vout OUTPUT > PF von Vv e open 500 | ik 0 = -15V => => Figure 4. MAX4508 Break-Before-Make Interval +15V Rs | NO V+ 43V VEN Loaic EN OFF ON OFF MNAAXIAN INPUT Vg __ tip MAX4508 Ver (OV CHANNEL COM Vout L SELECT} |! Hf b2 ___ = Of N\ pre L Y VouT fe AVouT IS THE MEASURED VOLTAGE DUE TO CHARGE TRANSFER ERROR Vete WHEN THE CHANNEL TURNS OFF. Vete= AVouT * CL Figure 5. Charge Injection +15V 10nF tA] NOt V+ VIN | | Ps = 502 b NOS MAXLAM MAX4508 AQ COM Al A2 G ND EN V- = 10nF = sv = AL 75Q, v OFF-ISOLATION = clo aut ) Vout Vin +15V 10nF tary NOt V+ = Ne | ndg AAAXIAA MAX4508 A0 COM Vout Al Re 2 GND EN V- 752 e = 10nF tL Ly \ CROSSTALK = 20log ( aw ) Vin Figure 6. Off-isolation MAXIM Figure 7. Crosstalk 13 60SVXVW/80S~VXVNMAX4508/MAX4509 Fault-Protected, High-Voltage Single 8-to-1/Dual 4-to-1 Multiplexers Test Circuits/Timing Diagrams (continued) +15V fre Ye Noi bo CHANNEL MAXIM i {MHz SELECT 4 141 yayasog N08 FOO CAPACITANCE . ANALYZER { Ao como = GND AN V- f=1MHz Sy Vino. +25V [sv xX S\ -15V -25V Figure 8. NO_, COM_ Capacitance Figure 9. Transient Behavior of Fault Condition Functional Diagrams/Truth Tables MAAXLAA MAX4508 V+ V- GND NOt NO2 NOS NO4 COM NOS NOs NO? NO8 DECODERS / DRIVERS AO Al A2 EN MAX4508 Al AO EN ON SWITCH +--+ +2000 Oo w|B xX 0 0 1 1 0 0 1 1 - oF oO +7 390+ 2 0 1 1 1 1 1 1 1 1 NONE 1 aon mo FF WO DY LOGIC "O" Val <40.8V, LOGIC "1" Vay > +2.4V MAXLA MAX4509 V+ V- GND NOIA NO2A NOSA NO4A COMA NOIB NO2B NOB NO4B COMB DECODERS / DRIVERS MAX4509 Al EN ON SWITCH xX 0 0 1 1 + OoOC}+ClUCOlUK 0 1 1 1 1 NONE 1 2 3 4 LOGIC "O" Va, <40.8V, LOGIC "1" Vay > 42.4V 14 MAXIMA__Ordering Information (continued) Fault-Protected, High-Voltage Single 8-to-1/Dual 4-to-1 Multiplexers PART TEMP. RANGE PIN-PACKAGE MAX4509CAE 0C to +70C 16 SSOP MAX4509CSE 0C to +70C 16 Narrow SO MAX4509CPE 0C to +70C 16 Plastic DIP MAX4509C/D 0C to +70C Dice MAX4509EAE -40C to +85C 16 SSOP MAX4509ESE -40C to +85C 16 Narrow SO MAX4509EPE -40C to +85C 16 Plastic DIP MAX4509MJE -55C to +125C 16 CERDIP** *Contact factory for dice specifications. Contact factory for availability. MA AXIM Chip Topography NOS 0.198" (5.03mm) NO6 0.086" (2.18mm) TRANSISTOR COUNT: 543 SUBSTRATE IS INTERNALLY CONNECTED TO V+. _r 15 60SVXVW/80S~VXVNMAX4508/MAX4509 Fault-Protected, High-Voltage Single 8-to-1/Dual 4-to-1 Multiplexers Package Information INCHES __MILLIMETERS INCHES MILLIMETERS DIM] MIN | MAX | MIN | MAX mal i7311 MIN | MAX | MIN | MAX | | | | | i | 0.068 (0.078 | 1.73 | 1.99 0.239 |0.249 | 6.07 | 6.33 | 14L 0.002 10.008 | 0.05 | 0.21 0.239 [0.249 | 6.07] 6.33 | 16L ) 9.010 [0.015 [025 10.38 0.278/0.289 | 7.07| 7.33] 20L E H 0.004 10.008 10.09 {0.20 0.317 [0.328 | 8.07] 8.33] 24L } pil SEE VARIATIONS 0.39710.407 |10.07|10.33 | 28L [ }} \) | c CCI fh | B } | L a SSOP EPS. > > a eit) 0.205 |0.209 | 5.20 3.38 0.0256 BSC |0.65 BSC 0.301 [0.311 | 7.65 | 7.90 0.025 |0.037 | 0.63 | 0.95 0 g 0 8 RlTH/Ll9 | Moola D | Al NOTES: y 1. D&E DO NOT INCLUDE MOLD FLASH. MIA xX I VI 2, MOLD FLASH OR PROTRUSIONS NOT TO 7 EXCEED 15mm .006*) PACKAGE OUTLINE, SSOP, 5.3X.65mm Tee TERT COTA A mY ]q 3. CONTROLLING DIMENSION: MILLIMETER >1-0056 A K Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 16 Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 1999 Maxim Integrated Products Printed USA MAXIMA is a registered trademark of Maxim Integrated Products.