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DS1225AB Datasheet 64k Nonvolatile Sram

Manufacturer: Maxim Integrated (now Analog Devices)

Overview: 19-5625; Rev 11/10 www.maxim-ic.com.

General Description

A0-A12 - Address Inputs DQ0-DQ7 - Data In/Data Out CE - Chip Enable WE - Write Enable OE VCC GND NC - 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.

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 of 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).
  • Optiona.

More Datasheets from Maxim Integrated (now Analog Devices)

Part Number Description
DS1225AD 64k Nonvolatile SRAM
DS1225Y 64k Nonvolatile SRAM
DS1220AB 16k Nonvolatile SRAM
DS1220AD 16k Nonvolatile SRAM
DS1220Y 16k Nonvolatile SRAM
DS1210 Nonvolatile Controller
DS1217M Nonvolatile Read/Write Cartridge
DS1218 Nonvolatile Controller
DS1243Y 64K NV SRAM
DS1244 256K NV SRAM

DS1225AB Distributor