DS1330AB データシートの表示（PDF） - Dallas Semiconductor -> Maxim Integrated

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DS1330AB

256k Nonvolatile SRAM with Battery Monitor

Dallas Semiconductor -> Maxim Integrated 

DS1330Y/AB

256k Nonvolatile SRAM

with Battery Monitor

www.maxim-ic.com

FEATURES

§ 10 years minimum data retention in the

absence of external power

§ Data is automatically protected during power loss

§ Power supply monitor resets processor when

VCC power loss occurs and holds processor in

reset during VCC ramp-up

§ Battery monitor checks remaining capacity

daily

§ Read and write access times as fast as 70ns

§ Unlimited write cycle endurance

§ Typical standby current 50mA

§ Upgrade for 32k x 8 SRAM, EEPROM or

Flash

§ Lithium battery is electrically disconnected to

retain freshness until power is applied for the

first time

§ Full ±10% VCC operating range (DS1330Y)

or optional ±5% VCC operating range

(DS1330AB)

§ Optional industrial temperature range of

-40°C to +85°C, designated IND

§ PowerCap Module (PCM) package

- Directly surface-mountable module

- Replaceable snap-on PowerCap provides

lithium backup battery

- Standardized pinout for all nonvolatile (NV)

SRAM products

- Detachment feature on PowerCap allows easy

removal using a regular screwdriver

PIN ASSIGNMENT

BW

1

NC

2

NC

3

RST

4

VCC

5

WE

6

OE

7

CE

8

DQ7

9

DQ6

10

DQ5

11

DQ4

12

DQ3

13

GND VBAT

DQ2

14

DQ1

15

DQ0

16

GND

17

34

NC

33

NC

32

A14

31

A13

30

A12

29

A11

28

A10

27

A9

26

A8

25

A7

24

A6

23

A5

22

A4

21

A3

20

A2

19

A1

18

A0

34-Pin POWERCAP MODULE (PCM)

(USES DS9034PC POWERCAP)

PIN DESCRIPTION

A0 – A14

- Address Inputs

DQ0 – DQ7

- Data In/Data Out

CE

- Chip Enable

WE

- Write Enable

OE

- Output Enable

RST

- Reset Output

BW

- Battery Warning

VCC

GND

- Power (+5V)

- Ground

NC

- No Connect

DESCRIPTION

The DS1330 256k NV SRAMs are 262,144-bit, fully static, NV SRAMs organized as 32,768 words by 8

bits. Each NV SRAM has a self-contained lithium energy source and control circuitry which constantly

monitors VCC for an out-of-tolerance 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 DS1330 devices have dedicated circuitry for monitoring the status of VCC and the status

of the internal lithium battery. DS1330 devices in the PowerCap module package are directly surface

mountable and are normally paired with a DS9034PC PowerCap to form a complete NV SRAM module.

The devices can be used in place of 32k x 8 SRAM, EEPROM, or Flash components.

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