
Philips Semiconductors Product specification
74LVC109Dual JK flip-flop with set and reset; positive-edge trigger
2
1998 Apr 28 853–1947 19308
FEATURES
•Wide supply voltage range of 1.2 to 3.6 V
•In accordance with JEDEC standard no. 8-1A.
•Inputs accept voltages up to 5.5 V
•CMOS low power consumption
•Direct interface with TTL levels
•Output capability: standard
•ICC category: flip-flops
DESCRIPTION
The 74LVC109 is a low-voltage Si-gate CMOS device that is pin and
function compatible with 74HC/HCT109.
The 74LVC109 is a dual positive-edge triggered JK-type flip-flop
featuring individual J, K inputs, clock (CP) inputs, set (SD) and reset
(RD) inputs; also complementary Q and Q outputs.
The set and reset are asynchronous active LOW inputs and operate
independently of the clock input.
The J and K inputs control the state changes of the flip-flops as
described in the mode select function table. The J and K inputs must
be stable one set-up time prior to the LOW-to-HIGH clock transition
for predictable operation. The JK design allows operation as a
D-type flip-flop by tying the J and K inputs together.
Schmitt-trigger action in the clock input makes the circuit highly
tolerant to slower clock rise and fall times.
QUICK REFERENCE DATA
GND = 0 V ; Tamb = 25°C; tr = tf ≤ 2.5 ns
SYMBOL PARAMETER CONDITIONS TYPICAL UNIT
tPHL/tPLH
Propagation delay
nCP to nQ, nQ
nSD to nQ, nQ
nRD to nQ, nQ CL = 50 pF;
VCC = 3.3 V
4.0
4.5
4.5 ns
fmax Maximum clock frequency 250 MHz
CIInput capacitance 5.0 pF
CPD Power dissipation capacitance per flip-flop VI = GND to VCC127 pF
NOTE:
1. CPD is used to determine the dynamic power dissipation (PD in µW)
PD = CPD × VCC2 × fi Σ (CL × VCC2 × fo) where:
fi = input frequency in MHz; CL = output load capacity in pF;
fo = output frequency in MHz; VCC = supply voltage in V ;
Σ (CL × VCC2 × fo) = sum of the outputs.
ORDERING INFORMATION
PACKAGES TEMPERATURE RANGE OUTSIDE NORTH AMERICA NORTH AMERICA PKG. DWG. #
16-Pin Plastic SO –40°C to +85°C74LVC109 D 74LVC109 D SOT109-1
16-Pin Plastic SSOP Type II –40°C to +85°C74LVC109 DB 74LVC109 DB SOT338-1
16-Pin Plastic TSSOP Type I –40°C to +85°C74LVC109 PW 74LVC109PW DH SOT403-1
PIN CONFIGURATION
SV00517
1RD
1K
1CP
1SD
VCC
2RD
2J
2K
2CP
2SD
2Q
2Q
1J
1Q
1Q
GND
14
13
12
11
10
98
1
2
3
4
5
6
7
16
15
PIN DESCRIPTION
PIN
NUMBER SYMBOL FUNCTION
1, 15 1RD, 2RDAsynchronous reset input
(active LOW)
2, 14, 3, 13 1J, 2J, 1K, 2K Synchronous inputs;
flip-flops 1 and 2
4, 12 1CP, 2CP Clock input
(LOW-to-HIGH, edge-triggered)
5, 11 1SD, 2SDAsynchronous set inputs
(active LOW)
6, 10 1Q, 2Q T rue flip-flop outputs
7, 9 1Q, 2Q Complement flip-flop outputs
8 GND Ground (O V)
16 VCC Positive supply voltage