DS1330YP-70IND+【PDF 1/10 页】IC NVSRAM 256KBIT 70NS 34PCM

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19-5593; Rev 10/10

DS1330Y/AB

256k Nonvolatile SRAM

with Battery Monitor

www.maxim-ic.com

FEATURES

PIN ASSIGNMENT

10 years minimum data retention in the

RST

V CC

DQ7

DQ6

DQ5

DQ4

GND V BAT

DQ3

DQ2

DQ1

DQ0

GND

absence of external power

Data is automatically protected during power

loss

Power supply monitor resets processor when

V CC power loss occurs and holds processor in

reset during V CC ramp-up

Battery monitor checks remaining capacity

daily

Read and write access times of 70ns

Unlimited write cycle endurance

Typical standby current 50 μ A

Upgrade for 32k x 8 SRAM, EEPROM or

1 34

2 33

3 32

4 31

6 29

7 28

9 26

11 24

13 22

14 21

15 20

17 18

34-Pin POWERCAP MODULE (PCM)

(Uses DS9034PC+ or DS9034PCI+ PowerCap)

A14

A13

A12

A11

A10

Flash

Lithium battery is electrically disconnected to

retain freshness until power is applied for the

first time

Full ± 10% V CC operating range (DS1330Y)

or optional ± 5% V CC operating range

(DS1330AB)

PIN DESCRIPTION

A0 – A14 - Address Inputs

DQ0 – DQ7 - Data In/Data Out

CE - Chip Enable

W E - Write Enable

Optional industrial temperature range of

-40 ° C to +85 ° C, designated IND

PowerCap Module (PCM) package

RS T

- Output Enable

- Reset Output

- Battery Warning

Directly surface-mountable module

Replaceable snap-on PowerCap provides

lithium backup battery

Standardized pinout for all nonvolatile

V CC

GND

- Power (+5V)

- Ground

- No Connect

(NV) SRAM products

Detachment feature on PowerCap allows

easy removal using a regular screwdriver

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 V CC 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 V CC 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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