Datasheet4U.com

U631H256 Datasheet PDF

Simtek U631H256

The U631H256 has two separate modes of operation: SRAM mode and nonvolatile mode. The U631H256 is a fast static RAM (25 ns), with a nonvolatile electrically erasable PROM (EEPROM) element incorporated in each static memory cell. The U631H256 combines the high performance and ease of use of a fast SRAM with nonvolatile data integrity.
Part No. U631H256
Datasheet U631H256 Download
Manufacturer
Simtek
Description SoftStore 32K x 8 nvSRAM
Buy Stock & Price
U631H256 datasheet page 1 preview

FEATURES

‡ High-performance CMOS nonvolatile static RAM 32768 x 8 bits ‡ 25 ns Access Times ‡ 10 ns Output Enable Access Times ‡ Software STORE Initiation ‡ 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 ‡ Unlimited Read and Write to SRAM ‡ Single 5 V ± 10 % Operation ‡ Operating temperature ranges: 0 to 70 °C -40 to 85 °C ‡ QS 9000 Quality Standard ‡ ESD protection > 2000 V (MIL STD 883C M3015.7-HBM) ‡ RoHS compliance and Pb- free Package: SOP28 (330 mil)

DESCRIPTION

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 disabled. The SRAM can be read and written an unlimited number of times, while independent nonvolatile data resides in EEPROM. Data transfers from the SRAM to the EEPROM (the STORE operation), or from the EEPROM to the SRAM (the RECALL operation) are initiated through software sequences.
U631H256 page 2 preview U631H256 page 3 preview