DS1350W

3.3V 4096K Nonvolatile SRAM

with Battery Monitor

DS1350W

PRELIMINARY

022598 1/11

FEATURES

external power

CC

power loss occurs and holds processor in reset during

freshness until power is applied for the first time

+85

°C, designated IND

– Directly surface–mountable module

– Replaceable snap–on PowerCap provides lith-

ium backup battery

– Standardized pinout for all nonvolatile SRAM

products

– Detachment feature on PowerCap allows easy

removal using a regular screwdriver

PIN ASSIGNMENT

BW

OE

CE

WE

RST

1

2

3

4

5

6

7

8

9

10

11

12

13

34

33

32

31

30

29

28

27

26

25

24

23

22

14

15

16

17

21

20

19

18

A18

A17

A14

A13

A12

A11

A10

A9

A8

A7

A6

A5

A4

A3

A2

A1

A0

A15

A16

DQ7

DQ6

DQ5

DQ4

DQ3

DQ2

DQ1

DQ0

GND

34–PIN POWERCAP MODULE (PCM)

GND

(USES DS9034PC POWERCAP)

PIN DESCRIPTION

A0–A18

– Address Inputs

DQ0–DQ7

– Data In/Data Out

CE

– Chip Enable

WE

– Write Enable

OE

– Output Enable

RST

– Reset Output

BW

– Battery Warning Output

– Power (+3.3 Volts)

GND

– Ground

NC

– No Connect

DESCRIPTION

The DS1350W 3.3V 4096K Nonvolatile SRAM is a

4,194,304–bit, fully static, nonvolatile SRAM organized

as 524,288 words by eight bits. Each NV SRAM has a

self–contained lithium energy source and control cir-

erance condition. When such a condition occurs, the

lithium energy source is automatically switched on and

write protection is unconditionally enabled to prevent

data corruption. Additionally, the DS1350W has dedi-

status of the internal lithium battery. DS1350W devices

in the PowerCap Module package are directly surface

mountable and are normally paired with a DS9034PC

PowerCap to form a complete Nonvolatile SRAM mod-

ule. The devices can be used in place of 512K x 8

SRAM, EEPROM or Flash components.