描述 Description

The UL634H256 has two separate modes of operation: SRAM mode and nonvolatile mode. In SRAM mode, the memory operates as an ordinary static RAM. In nonvolatile operation, data is transferred in parallel from SRAM to EEPROM or from EEPROM to SRAM. In this mode SRAM functions are disab

led.

特性 Features

High-performance CMOS non-volatile static RAM 32768 x 8 bits

35 and 45 ns Access Times

15 and 20 ns Output Enable Access Times

ICC = 8 mA typ. at 200 ns Cycle Time

Automatic STORE to EEPROM on Power Down using external capacitor

Software initiated STORE

Automatic STORE Timing

106 STORE cycles to EEPROM

100 years data retention in EEPROM

Automatic RECALL on Power Up

Software RECALL Initiation

Unlimited RECALL cycles from EEPROM

Wide voltage range: 2.7 ... 3.6 V (3.0 ... 3.6 V for 35 ns type)

Operating temperature range:

0 to 70 °C

-40 to 85 °C

-40 to 125 °C

QS 9000 Quality Standard

ESD protection > 2000 V (MIL STD 883C M3015.7-HBM)

RoHS compliance and Pb- free

Package: SOP32 (300 mil)