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DS1225Y-200+

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DS1225Y-200+ Overview

The DS1225Y 64k Nonvolatile SRAM is a 65,536-bit, fully static, nonvolatile RAM 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. The NV SRAM can be used in place of existing 8k x 8 SRAMs directly conforming to the popular bytewide 28-pin DIP standard. The DS1225Y also matches the pinout of the 2764 EPROM or 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.

Features

  • 10 years minimum data retention in the absence of external power
  • Data is automatically protected during power loss
  • Directly replaces 2k 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 150 ns
  • Full ±10% operating range
  • Optional industrial temperature range of -40°C to +85°C, designated IND

Applications

  • Data Logging: NVSRAM is used in data loggers and data storage systems where data must be retained even when the power supply is removed.
  • Industrial Control: It finds use in industrial automation and control systems, providing data retention for critical parameters and settings.
  • Embedded Systems: NVSRAM is incorporated into embedded systems, especially in applications where frequent write operations are necessary.
  • Network and Telecommunications Equipment: It can be used in network switches, routers, and other telecommunications devices to preserve configuration data.
  • Instrumentation: NVSRAM is used in test and measurement equipment for data storage and data integrity.

Specifications

  • Mounting Style Through Hole

  • Part # Aliases 90-1225Y+000

  • Organization 8 K x 8

  • Data Bus Width 8 bit

  • Supply Voltage - Min 4.5 V

  • Minimum Operating Temperature 0 C

  • Access Time 200 ns

  • Memory Size 64 Kbit

  • Package / Case EDIP

  • Packaging Bulk

  • Maximum Operating Temperature + 70 C

  • Supply Voltage - Max 5.5 V

  • Interface Type Parallel

  • Operating Current 75 mA

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