Datasheet > DS1345YB-70-IND

DS1345YB-70-IND

更新时间： 2022-04-23 23:00:11

品牌	Logo	应用领域
美信 - MAXIM		电池静态存储器监控
页数	文件大小	规格书
12页	220K
描述
1024k Nonvolatile SRAM with Battery Monitor

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DS1345YB-70-IND 数据手册

DS1345Y/AB

1024k Nonvolatile SRAM

with Battery Monitor

www.maxim-ic.com

FEATURES

PIN ASSIGNMENT

ꢀꢁ10 years minimum data retention in the

absence of external power

A14

ꢀꢁ Data is automatically protected during power

loss

ꢀꢁPower supply monitor resets processor when

A15

A16

RST

V_CC

A13

A12

A11

A10

V_CCpower loss occurs and holds processor in

DQ7

DQ6

DQ5

DQ4

DQ3

DQ2

DQ1

DQ0

GND

reset during V_CCramp-up

ꢀꢁBattery monitor checks remaining capacity

daily

GND V_BAT

ꢀꢁRead and write access times as fast as 70ns

ꢀꢁUnlimited write cycle endurance

ꢀꢁTypical standby current 50µA

ꢀꢁUpgrade for 128k x 8 SRAM, EEPROM or

Flash

34-Pin PowerCap Module (PCM)

(Uses DS9034PC PowerCap)

ꢀꢁLithium battery is electrically disconnected to

retain freshness until power is applied for the

first time

ꢀꢁFull ±10% V_CCoperating range (DS1345Y)

or optional ±5% V_CCoperating range

(DS1345AB)

ꢀꢁOptional industrial temperature range of

-40°C to +85°C, designated IND

ꢀꢁPowerCap Module (PCM) package

PIN DESCRIPTION

A0 – A16

DQ0 – DQ7

- Address Inputs

- Data In/Data Out

- Chip Enable

- Write Enable

- Output Enable

- Reset Output

RST

V_CC

GND

- Battery Warning Output

- Power (+5V)

- Ground

Directly surface-mountable module

Replaceable snap-on PowerCap provides

lithium backup battery

- No Connect

Standardized pinout for all nonvolatile

(NV) SRAM products

Detachment feature on PowerCap allows

easy removal using a regular screwdriver

DESCRIPTION

The DS1345 1024k NV SRAMs are 1,048,576-bit, fully static, NV SRAMs organized as 131,072 words

by 8 bits. Each NV SRAM has a self-contained lithium energy source and control circuitry which

constantly monitors V_CCfor 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 DS1345 devices have dedicated circuitry for monitoring the status of

V_CCand the status of the internal lithium battery. DS1345 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 128k x 8 SRAM, EEPROM, or Flash components.

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