CAT1640RD2I-25TE13 - Catalyst Semiconductor, Inc.

Characteristics subject to change without notice 1

CAT1640, CAT1641

Supervisory Circuits with I2C Serial 64K CMOS EEPROM

Doc. No. 25082, Rev. 00

FEATURES

■Precision power supply voltage monitor

— 5V, 3.3V and 3V systems

- +5.0V (+/- 5%, +/- 10%)

- +3.3V (+/- 5%, +/- 10%)

- +3.0V (+/- 10%)

■Active low reset, CAT1640

■Active high reset, CAT1641

■Valid reset guaranteed at VCC=1V

■400kHz I2C bus

■3.0V to 5.5V operation

■Low power CMOS technology

■64-Byte page write buffer

■1,000,000 Program/Erase cycles

■100 year data retention

■8-pin DIP, SOIC, TSSOP and TDFN packages

■Industrial temperature range

PIN CONFIGURATION

DESCRIPTION

The CAT1640 and CAT1641 are complete memory and

supervisory solutions for microcontroller-based systems.

A 64kbit serial EEPROM memory and a system power

supervisor with brown-out protection are integrated

together in low power CMOS technology. Memory

interface is via a 400kHz I2C bus.

The CAT1640 provides a precision VCC sense circuit

and drives an open drain output, RESET low whenever

VCC falls below the reset threshold voltage.

The CAT1641 provides a precision VCC sense circuit

that drives an open drain output, RESET high whenever

VCC falls below the reset threshold voltage.

The power supply monitor and reset circuit protect

memory and system controllers during power up/down

and against brownout conditions. Five reset threshold

voltages support 5V, 3.3V and 3V systems. If power

supply voltages are out of tolerance reset signals become

active, preventing the system microcontroller, ASIC or

peripherals from operating. Reset signals become inactive

typically 200 ms after the supply voltage exceeds the reset

threshold level. With both active high and low reset options,

interface to microcontrollers and other ICs is simple. In

addition, the RESET (CAT1640) pin can be used as an

input for push-button manual reset capability.

The CAT1640/41 memory features a 64-byte page. In

addition, hardware data protection is provided by a VCC

sense circuit that prevents writes to memory whenever VCC

falls below the reset threshold or until VCC reaches the reset

threshold during power up.

Available packages include an 8-pin DIP, SOIC, TSSOP

and 4.9 x 3mm TDFN.

PDIP (P, L) SOIC (J, W) TDFN PACKAGE: 4.9MM X 3MM

(RD2, ZD2)

A0 VCC

RESE

SCL

SDA

VSS

CAT1640

VCC

RESET

SCL

SDA

CAT1641

VSS

VCC

RESE

SCL

SDA

CAT1640

VSS

VCC

RESE

SCL

SDA

CAT1641

VSS

A0 VCC

RESE

SCL

SDA

VSS

CAT1640

CAT1641

VCC

RESET

SCL

SDA

VSS

TSSOP (U, Y)

CAT1640, CAT1641 Advance Information

Doc. No. 25082, Rev. 00

PIN DESCRIPTION

RESET/RESETRESET

RESETRESET

RESET: RESET OUTPUTS

These are open-drain pins and RESET can also be used

as a manual reset trigger input. By forcing a reset condition

on the pin the device will initiate and maintain a reset

condition. The RESET pin must be connected through a

pull-down resistor and the RESET pin must be connected

through a pull-up resistor.

SDA: SERIAL DATA ADDRESS

The bidirectional serial data/address pin is used to trans-

fer all data into and out of the device. The SDA pin is an

open drain output and can be wire-ORed with other open

drain or open collector outputs.

BLOCK DIAGRAM — CAT1640, CAT1641

PIN FUNCTIONS

Pin Name Function

RESET Active Low Reset Input/Output (CAT1640)

VSS Ground

SDA Serial Data/Address

SCL Clock Input

RESET Active High Reset Output (CAT1641)

VCC Power Supply

OPERATING TEMPERATURE RANGE

Industrial -40˚C to 85˚C

Part Dash Minimum Maximum

Number Threshold Threshold

-45 4.50 4.75

-42 4.25 4.50

-30 3.00 3.15

-28 2.85 3.00

-25 2.55 2.70

Threshold Voltage Options

64kbit

DOUT

ACK

SENSE AMPS

SHIFT REGISTERS

CONTROL

LOGIC

WORD ADDRESS

BUFFERS

START/STOP

LOGIC

EEPROM

VCC

EXTERNAL LOAD

COLUMN

DECODERS

XDEC

DATA IN STORAGE

HIGH V OL TAGE/

TIMING CONTROL

VSS

SDA

RESET Controller

Precision

Vcc Monitor

STATE COUNTERS

SLAVE

ADDRESS

COMPARATORS

RESET (CAT1640)

RESET (CAT1641)

SCL: SERIAL CLOCK

Serial clock input.

A0, A1, A2: DEVICE ADDRESS INPUTS

When hardwired, up to eight CAT1640/41 devices may

be addressed on a single bus system (refer to Device

Addressing). When the pins are left unconnected, the

default values are zeros.

Advance Information CAT1640, CAT1641

Doc No. 25082, Rev. 00

D.C. OPERATING CHARACTERISTICS

VCC = +3.0V to +5.5V and over the recommended temperature conditions unless otherwise specified.

Notes:

1. This parameter is tested initially and after a design or process change that affects the parameter. Not 100% tested.

2. VIL min and VIH max are reference values only and are not tested.

ABSOLUTE MAXIMUM RATINGS

Temperature Under Bias ....................-40°C to +85°C

Storage Temperature........................-65°C to +105°C

Voltage on any Pin with

Respect to Ground(1) ............. -0.5V to +VCC +2.0V

VCC with Respect to Ground ................ -0.5V to +7.0V

Package Power Dissipation

Capability (TA = 25°C) ................................... 1.0W

Lead Soldering Temperature (10 secs)............ 300°C

Output Short Circuit Current(1) ........................ 100 mA

Stresses above 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

outside of those listed in the operational sections of this specification

is not implied. Exposure to any absolute maximum rating for extended

periods may affect device performance and reliability.

Note:

(1) Output shorted for no more than one second. No more than

one output shorted at a time.

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CAT1640, CAT1641 Advance Information

Doc. No. 25082, Rev. 00

CAPACITANCE

TA = 25°C, f = 1.0 MHz, VCC = 5V

Symbol Test Test Conditions Max Units

COUT(1) Output Capacitance VOUT = 0V 8 pF

CIN(1) Input Capacitance VIN = 0V 6 pF

A.C. CHARACTERISTICS

VCC = 3.0V to 5.5V and over the recommended temperature conditions, unless otherwise specified.

Notes:

1. This parameter is characterized initially and after a design or process change that affects

the parameter. Not 100% tested.

2. Test Conditions according to “AC Test Conditions” table.

3. The write cycle time is the time from a valid stop condition of a write sequence to the end of

the internal program/erase cycle. During the write cycle, the bus interface circuits are disabled,

SDA is allowed to remain high and the device does not respond to its slave address.

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Advance Information CAT1640, CAT1641

Doc No. 25082, Rev. 00

RESET CIRCUIT A.C. CHARACTERISTICS

Notes:

1. Test Conditions according to “AC Test Conditions” table.

2. Power-up, Input Reference Voltage VCC = VTH, Reset Output Reference Voltage and Load according to “AC Test Conditions” Table

3. Power-Down, Input Reference Voltage VCC = VTH, Reset Output Reference Voltage and Load according to “AC Test Conditions” Table

4. VCC Glitch Reference Voltage = VTHmin; Based on characterization data

5. This parameter is characterized initially and after a design or process change that affects the parameter. Not 100% tested.

6. tPUR and tPUW are the delays required from the time VCC is stable until the specified memory operation can be initiated.

AC TEST CONDITIONS

RELIABILITY CHARACTERISTICS

Symbol Parameter Reference Test Method Min Max Units

NEND(1) Endurance MIL-STD-883, Test Method 1033 1,000,000 Cycles/Byte

TDR(1) Data Retention MIL-STD-883, Test Method 1008 100 Years

VZAP(1) ESD Susceptibility MIL-STD-883, Test Method 3015 2000 Volts

ILTH(1)(2) Latch-Up JEDEC Standard 17 100 mA

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Notes:

1. This parameter is tested initially and after a design or process change that affects the parameter. Not 100% tested.

2. Latch-up protection is provided for stresses up to 100mA on input and output pins from -1V to VCC + 1V.

CAT1640, CAT1641 Advance Information

Doc. No. 25082, Rev. 00

When RESET I/O is driven to the active state, the 200

msec timer will begin to time the reset interval. If external

reset is shorter than 200 ms, Reset outputs will remain

active at least 200 ms.

Glitches shorter than 100 ns on RESET input will not

generate a reset pulse.

Hardware Data Protection

The CAT1640/41 family has been designed to solve

many of the data corruption issues that have long been

associated with serial EEPROMs. Data corruption occurs

when incorrect data is stored in a memory location which

is assumed to hold correct data.

Whenever the device is in a Reset condition, the embedded

EEPROM is disabled for all operations, including write

operations. If the Reset output is active, in progress

communications to the EEPROM are aborted and no new

communications are allowed. In this condition an internal

write cycle to the memory can not be started, but an in

progress internal non-volatile memory write cycle can not

be aborted. An internal write cycle initiated before the

Reset condition can be successfully finished if there is

enough time (5ms) before VCC reaches the minimum

value of 2V.

DEVICE OPERATION

Reset Controller Description

The CAT1640/41 precision RESET controllers ensure

correct system operation during brownout and power

up/down conditions. They are configured with open-

drain RESET/RESET outputs.

During power-up, the RESET/RESET output remains

active until VCC reaches the VTH threshold and will

continue driving the outputs for approximately 200ms

(tPURST) after reaching VTH. After the tPURST timeout

interval, the device will cease to drive the reset output.

At this point the reset output will be pulled up or down by

their respective pull up/down resistors.

During power-down, the RESET/RESET output will be

active when VCC falls below VTH. The RESET/RESET

output will be valid so long as VCC is >1.0V (VRVALID).

The device is designed to ignore the fast negative going

VCC transient pulses (glitches).

Reset output timing is shown in Figure 1.

Manual Reset Operation

The RESET pin can operate as reset output and manual

reset input. The input is edge triggered; that is, the

RESET input will initiate a reset timeout after detecting

a high to low transition.

Figure 1. RESET/RESET Output Timing

GLITCH

CC PURST

PURST

RPD

RVALID

RESET

RPD

Advance Information CAT1640, CAT1641

Doc No. 25082, Rev. 00

Figure 2. RESETRESET

RESETRESET

RESET as Manual Reset Input Operation and Timing

RESET

tPURST

tMRW

RESET

(Input)

(Output)

tHIGH

SCL

SDA IN

SDA OUT

tLOW

tFtLOW

tBUF

tSU:STO

tSU:DAT

tHD:DAT

tHD:STA

tSU:STA

tAA tDH

Figure 3. Bus Timing

CAT1640, CAT1641 Advance Information

Doc. No. 25082, Rev. 00

EMBEDDED EEPROM OPERATION

The CAT1640 and CAT1641 feature a 64kbit

embedded serial EEPROM that supports the I2C Bus

data transmission protocol. This Inter-Integrated

Circuit Bus protocol defines any device that sends

data to the bus to be a transmitter and any device

receiving data to be a receiver. The transfer is

controlled by the Master device which generates the

serial clock and all START and STOP conditions for

bus access. Both the Master device and Slave device

can operate as either transmitter or receiver, but the

Master device controls which mode is activated.

I2C Bus Protocol

The features of the I2C bus protocol are defined as

follows:

(1) Data transfer may be initiated only when the bus is

not busy.

(2) During a data transfer, the data line must remain

stable whenever the clock line is high. Any changes in

the data line while the clock line is high will be interpreted

as a START or STOP condition.

START Condition

The START Condition precedes all commands to the

device, and is defined as a HIGH to LOW transition of

SDA when SCL is HIGH. The CAT1640/41 monitors the

SDA and SCL lines and will not respond until this

condition is met.

STOP Condition

A LOW to HIGH transition of SDA when SCL is HIGH

determines the STOP condition. All operations must end

with a STOP condition.

DEVICE ADDRESSING

The Master begins a transmission by sending a START

condition. The Master sends the address of the particular

slave device it is requesting. The four most significant

bits of the 8-bit slave address are programmable in metal

and the default is 1010.

The last bit of the slave address specifies whether a

Read or Write operation is to be performed. When this bit

is set to 1, a Read operation is selected, and when set

to 0, a Write operation is selected.

After the Master sends a START condition and the slave

address byte, the CAT1640/41 monitors the bus and

responds with an acknowledge (on the SDA line) when

its address matches the transmitted slave address. The

CAT1640/41 then performs a Read or Write operation

depending on the R/W bit.

tWR

STOP

CONDITION START

CONDITION ADDRESS

ACK8TH BIT

BYTE n

SCL

SDA

Figure 4. Write Cycle Timing

Advance Information CAT1640, CAT1641

Doc No. 25082, Rev. 00

ACKNOWLEDGE

After a successful data transfer, each receiving device

is required to generate an acknowledge. The

acknowledging device pulls down the SDA line during

the ninth clock cycle, signaling that it received the 8 bits

of data.

The CAT1640/41 responds with an acknowledge after

receiving a START condition and its slave address. If the

device has been selected along with a write operation,

it responds with an acknowledge after receiving each 8-

bit byte.

When the CAT1640/41 begins a READ mode it transmits

8 bits of data, releases the SDA line and monitors the

line for an acknowledge. Once it receives this

acknowledge, the CAT1640/41 will continue to transmit

data. If no acknowledge is sent by the Master, the device

terminates data transmission and waits for a STOP

condition.

WRITE OPERATIONS

Byte Write

In the Byte Write mode, the Master device sends the

START condition and the slave address information (with

the R/W bit set to zero) to the Slave device. After the Slave

generates an acknowledge, the Master sends two 8-bit

address bytes that are to be written into the address

pointers of the device. After receiving another acknowledge

from the Slave, the Master device transmits the data to be

written into the addressed memory location. The CAT1640/

41 acknowledges once more and the Master generates

the STOP condition. At this time, the device begins an

internal programming cycle to non-volatile memory. While

the cycle is in progress, the device will not respond to any

request from the Master device.

Figure 7. Slave Address Bits

CAT

Default Configuration

1010A2A1A0R/W

START BIT

SDA

STOP BIT

SCL

Figure 5. Start/Stop Timing

ACKNOWLEDGE

START

SCL FROM

MASTER 89

DATA OUTPUT

FROM TRANSMITTER

DATA OUTPUT

FROM RECEIVER

Figure 6. Acknowledge Timing

CAT1640, CAT1641 Advance Information

Doc. No. 25082, Rev. 00

Figure 9. Page Write Timing

*=Don’t Care Bit

Figure 8. Byte Write Timing

*=Don’t Care Bit

Page Write

The CAT1640/41 writes up to 64 bytes of data in a single

write cycle, using the Page Write operation. The page

write operation is initiated in the same manner as the byte

write operation, however instead of terminating after the

initial byte is transmitted, the Master is allowed to send up

to additional 63 bytes. After each byte has been

transmitted, the CAT1640/41 will respond with an

acknowledge and internally increment the lower order

address bits by one. The high order bits remain

unchanged.

If the Master transmits more than 64 bytes before sending

the STOP condition, the address counter ‘wraps around,’

and previously transmitted data will be overwritten.

When all 64 bytes are received, and the STOP condition

has been sent by the Master, the internal programming

cycle begins. At this point, all received data is written to

the CAT1640/41 in a single write cycle.

A15–A8

SLAVE

ADDRESS

DATA

BUS ACTIVITY :

MASTER

SDA LINE

TA7–A0

BYTE ADDRESS

***

A15–A8

SLAVE

ADDRESS

BUS ACTIVITY :

MASTER

SDA LINE

TA7–A0

BYTE ADDRESS DATA n+63DATA

DATA n

***

Advance Information CAT1640, CAT1641

Doc No. 25082, Rev. 00

Acknowledge Polling

Disabling of the inputs can be used to take advantage of

the typical write cycle time. Once the stop condition is

issued to indicate the end of the host’s write opration, the

CAT1640/41 initiates the internal write cycle. ACK polling

can be initiated immediately. This involves issuing the

start condition followed by the slave address for a write

operation. If the device is still busy with the write operation,

no ACK will be returned. If a write operation has

completed, an ACK will be returned and the host can

then proceed with the next read or write operation.

Read Operations

The READ operation for the CAT1640/41 is initiated in

the same manner as the write operation with one

exception, that R/W bit is set to one. Three different

READ operations are possible: Immediate/Current

Address READ, Selective/Random READ and

Sequential READ.

SCL

SDA 8TH BIT

STOPNO ACKDATA OUT

SLAVE

ADDRESS

KDATA N

BUS ACTIVITY :

MASTER

SDA LINE

Figure 10. Immediate Address Read Timing

CAT1640, CAT1641 Advance Information

Doc. No. 25082, Rev. 00

Figure 11. Selective Read Timing

*=Don’t Care Bit

Immediate/Current Address Read

The CAT1640 and CAT1641 address counter contains

the address of the last byte accessed, incremented by

one. In other words, if the last READ or WRITE access

was to address N, the READ immediately following

would access data from address N+1. For all devices,

N=E=8,192. The counter will wrap around to Zero and

continue to clock out valid data. After the CAT1640 and

CAT1641 receives its slave address information (with

the R/W bit set to one), it issues an acknowledge, then

transmits the 8-bit byte requested. The master device

does not send an acknowledge, but will generate a

STOP condition.

Selective/Random Read

Selective/Random READ operations allow the Master

device to select at random any memory location for a

READ operation. The Master device first performs a

‘dummy’ write operation by sending the START condition,

slave address and byte addresses of the location it

wishes to read. After the CAT1640 and CAT1641

acknowledges, the Master device sends the START

condition and the slave address again, this time with the

R/W bit set to one. The CAT1640 and CAT1641 then

responds with its acknowledge and sends the 8-bit byte

requested. The master device does not send an

acknowledge but will generate a STOP condition.

Sequential Read

The Sequential READ operation can be initiated by

either the Immediate Address READ or Selective READ

operations. After the CAT1640 and CAT1641 sends the

inital 8-bit byte requested, the Master will responds with

an acknowledge which tells the device it requires more

data. The CAT1640 and CAT1641 will continue to output

an 8-bit byte for each acknowledge, thus sending the

STOP condition.

The data being transmitted from the CAT1640 and

CAT1641 is sent sequentially with the data from address

N followed by data from address N+1. The READ

operation address counter increments all of the CAT1640

and CAT1641 address bits so that the entire memory

array can be read during one operation.

BUS ACTIVITY :

MASTER

SDA LINE

DATA n+xDATA n

DATA n+1

DATA n+2

SLAVE

ADDRESS

Figure 12. Sequential Read Timing

A15–A8

SLAVE

ADDRESS

BUS ACTIVITY :

MASTER

SDA LINE

TA7–A0

BYTE ADDRESS SLAVE

ADDRESS

TDATA

***

Advance Information CAT1640, CAT1641

Doc No. 25082, Rev. 00

8-LEAD PDIP (P, L)

PACKAGE OUTLINES

0.180 (4.57) MAX

0.015 (0.38)

—

0.100 (2.54)

BSC

0.014 (0.36)

0.022 (0.56)

0.245 (6.17)

0.295 (7.49)

0.045 (1.14)

0.060 (1.52)

0.110 (2.79)

0.150 (3.81)

0.120 (3.05)

0.150 (3.81)

0.300 (7.62)

0.325 (8.26)

0.310 (7.87)

0.380 (9.65)

Notes:

1. Complies with JEDEC Publication 95 MS001 dimensions; however, some of the dimensions may be more stringent.

2. All linear dimensions are in inches and parenthetically in millimeters.

Dimension D

Pkg Min Max

8L 0.355 (9.02) 0.400 (10.16)

CAT1640, CAT1641 Advance Information

Doc. No. 25082, Rev. 00

8-LEAD SOIC (J, W)

PACKAGE OUTLINES

Notes:

1. Complies with JEDEC publication 95 MS-012 dimensions; however, some dimensions may be more stringent.

2. All linear dimensions are in inches and parenthetically in millimeters.

3. Lead coplanarity is 0.004" (0.102mm) maximum.

Dimension D

Pkg Min Max

8L 0.1890(4.80) 0.1968(5.00)

Advance Information CAT1640, CAT1641

Doc No. 25082, Rev. 00

8-LEAD TSSOP (U, Y)

PACKAGE OUTLINES

CAT1640, CAT1641 Advance Information

Doc. No. 25082, Rev. 00

8-PAD TDFN 4.9X3MM PACKAGE (RD2, ZD2)

PACKAGE OUTLINES

d 0.08 c

f 0.10 c

0.10m C A B

0.15

85A

3.00 + 0.15

2.00 + 0.15

0.10

0.15

0.20

0.25

PIN 1 ID

0.60 + 0.10 (8X)

0.15 c

4.90 + 0.10

(5)

PIN 1 INDEX AREA

3.00 + 0.10

(S)

0.30 + 0.05 (8X)

j1.95 REF. (2x)

0.65 TYP. (6x)

0.75 + 0.05

0.0-0.05

8x 0.20 REF.

NOTE:

1. ALL DIMENSION ARE IN mm. ANGLES IN DEGREES.

2. COPLANARITY APPLIES TO THE EXPOSED PAD AS WELL AS THE TERMINALS.

COPLANARITY SHALL NOT EXCEED 0.08mm.

3. WARPAGE SHALL NOT EXCEED 0.10mm.

4. PACKAGE LENGTH / PACKAGE WIDTH ARE CONSIDERED AS SPECIAL

CHARACTERISTIC(S).

5. REFER TO JEDEC MO-229, FOOTPRINTS ARE COMPATIBLE TO 8 MSOP.

Advance Information CAT1640, CAT1641

Doc No. 25082, Rev. 00

Ordering Information

Note:

(1) The device used in the above example is a CAT1640JI-30TE13 (Supervisory circuit with I2C serial 64k CMOS EEPROM, SOIC, Industrial

Temperature, 3.0-3.15V Reset Threshold Voltage, Tape and Reel).

1640

Temperature Range

I = Industrial (-40˚C to 85˚C)

Prefix Device # Suffix

JI TE13

Product

Number

1640: 64K

Tape & Reel

TE13: 2000/Reel

SOIC: 2000/Reel

TSSOP: 2000/Reel

TDFN: 2000/Reel

Package

P: PDIP

J: SOIC

U: TSSOP

RD2: 8-pad TDFN (4.9mmx3mm)

L: PDIP (Lead free, Halogen free)

W: SOIC, JEDEC (Lead free, Halogen free)

Y: TSSOP (Lead free, Halogen free)

ZD2: TDFN 4.9x3mm (Lead free, Halogen free)

-30

CAT

Reset Threshold

Voltage

45: 4.5-4.75V

42: 4.25-4.5V

30: 3.0-3.15V

28: 2.85-3.0V

25: 2.55-2.7V

Optional

Company ID

1641: 64K

Catalyst Semiconductor, Inc.

Corporate Headquarters

1250 Borregas Avenue

Sunnyvale, CA 94089

Phone: 408.542.1000

Fax: 408.542.1200

www.catalyst-semiconductor.com

Copyrights, Trademarks and Patents

Trademarks and registered trademarks of Catalyst Semiconductor include each of the following:

DPP ™ AE2 ™

Catalyst Semiconductor has been issued U.S. and foreign patents and has patent applications pending that protect its products. For a complete list of patents

issued to Catalyst Semiconductor contact the Company’s corporate office at 408.542.1000.

CATALYST SEMICONDUCTOR MAKES NO WARRANTY, REPRESENTATION OR GUARANTEE, EXPRESS OR IMPLIED, REGARDING THE SUITABILITY OF ITS

PRODUCTS FOR ANY PARTICULAR PURPOSE, NOR THAT THE USE OF ITS PRODUCTS WILL NOT INFRINGE ITS INTELLECTUAL PROPERTY RIGHTS OR THE

RIGHTS OF THIRD PARTIES WITH RESPECT TO ANY PARTICULAR USE OR APPLICATION and SPECIFICALLY DISCLAIMS ANY and ALL LIABILITY ARISING

OUT OF ANY SUCH USE OR APPLICATION, INCLUDING BUT NOT LIMITED TO, CONSEQUENTIAL OR INCIDENTAL DAMAGES.

Catalyst Semiconductor products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or

other applications intended to support or sustain life, or for any other application in which the failure of the Catalyst Semiconductor product could create a

situation where personal injury or death may occur.

Catalyst Semiconductor reserves the right to make changes to or discontinue any product or service described herein without notice. Products with data sheets

labeled "Advance Information" or "Preliminary" and other products described herein may not be in production or offered for sale.

Catalyst Semiconductor advises customers to obtain the current version of the relevant product information before placing orders. Circuit diagrams illustrate

typical semiconductor applications and may not be complete.

Publication #: 25082

Revison: 00

Issue date: 11/22/04

REVISION HISTORY

Date Rev. Reason

11/22/04 00 Initial issue