Datasheet > 1225

1225

更新时间： 2022-11-24 21:41:48

品牌	Logo	应用领域
达拉斯 - DALLAS		静态存储器
页数	文件大小	规格书
10页	149K
描述
64k Nonvolatile SRAM

阅读下载

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

1225 数据手册

DS1225AB/AD

64k Nonvolatile SRAM

www.dalsemi.com

FEATURES

PIN ASSIGNMENT

ꢀ 10 years minimum data retention in the

absence of external power

VCC

A12

ꢀ Data is automatically protected during power

loss

ꢀ Directly replaces 8k x 8 volatile static RAM

or EEPROM

ꢀ Unlimited write cycles

ꢀ Low-power CMOS

A11

A10

DQ7

DQ6

ꢀ JEDEC standard 28-pin DIP package

ꢀ Read and write access times as fast as 70 ns

ꢀ Lithium energy source is electrically

disconnected to retain freshness until power

is applied for the first time

ꢀ Full ±10% V_CCoperating range (DS1225AD)

ꢀ Optional ±5% V_CCoperating range

(DS1225AB)

DQ0

DQ1

DQ2

GND

DQ5

DQ4

DQ3

28-Pin ENCAPSULATED PACKAGE

720-mil EXTENDED

PIN DESCRIPTION

A0-A12

DQ0-DQ7

ꢀ Optional industrial temperature range of

-40°C to +85°C, designated IND

- Address Inputs

- Data In/Data Out

- Chip Enable

- Write Enable

- Output Enable

- Power (+5V)

- Ground

V_CC

GND

- No Connect

DESCRIPTION

The DS1225AB and DS1225AD are 65,536-bit, fully static, nonvolatile SRAMs organized as 8192 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. The NV SRAMs can be used in place of existing 8k x 8 SRAMs directly conforming to

the popular bytewide 28-pin DIP standard. The devices also match the pinout of the 2764 EPROM and

the 2864 EEPROM, allowing direct substitution while enhancing performance. There is no limit on the

number of write cycles that can be executed and no additional support circuitry is required for

microprocessor interfacing.

1 of 10

111899

12 3 4 5 6 7...10

下载PDF

与1225相关器件

型号	品牌	描述	获取价格	数据表
1225001-01	QUALTEK	Qualtek Electronics Corp. WCI DIVISION	获取价格
1225002-01	QUALTEK	Qualtek Electronics Corp. WCI DIVISION	获取价格
1225003-01	QUALTEK	Qualtek Electronics Corp. WCI DIVISION	获取价格
1225004-03	QUALTEK	Qualtek Electronics Corp. WCI DIVISION	获取价格
1225005-03	QUALTEK	Qualtek Electronics Corp. WCI DIVISION	获取价格
1225006-03	QUALTEK	Qualtek Electronics Corp. WCI DIVISION	获取价格