1225 Datasheet 64k Nonvolatile SRAM

Manufacturer: Dallas

1225 64k nonvolatile sram by Dallas - Datasheet Preview

Datasheet Details

Part number	1225
Manufacturer	Dallas
File Size	182.78 KB
Description	64k Nonvolatile SRAM
Download	1225 Download (PDF)

General Description

A0-A12 DQ0-DQ7 CE WE OE VCC GND NC - Address Inputs - Data In/Data Out - Chip Enable - Write Enable - Output Enable - Power (+5V) - Ground - 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 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.

Overview

www.DataSheet4U.com DS1225AB/AD 64k Nonvolatile SRAM www.dalsemi.

Key Features

10 years minimum data retention in the absence of external power Data is automatically protected during power loss Directly replaces 8k x 8 volatile static RAM or EEPROM Unlimited write cycles Low-power CMOS 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% VCC operating range (DS1225AD) Optional ±5% VCC operating range (DS1225AB) Optional indust.

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