STK14C88C 256-Kbit (32K × 8) nvSRAM
256-Kbit (32K × 8) nvSRAM Features Functional Description ■ 35 ns access time ■ Internally organized as 32K × 8 ■ Hands-off automatic STORE on power-down with only a small
capacitor ■ STORE to QuantumTrap nonvolatile elements initiated by
software, device pin, or autostore on power-down ■ RECALL to SRAM initiated by software or power-up ■ Infinite read, write, and RECALL cycles ■ 1 million STORE cycles to QuantumTrap ■ 20-year data retention ■ Single 5 V + 10% operation ■ Industrial and Military temperatures ■ 32-pin CDIP package The Cypress STK14C88C is a fast static RAM, with a nonvolatile
element in each memory cell. The memory is organized as 32KB.
The embedded nonvolatile elements incorporate QuantumTrap
technology, producing the world’s most reliable nonvolatile
memory. The SRAM provides infinite read and write cycles, while
independent nonvolatile data resides in the highly reliable
QuantumTrap cell. Data transfers from the SRAM to the
nonvolatile elements (the STORE operation) takes place
automatically at power-down. On power-up, data is restored to
the SRAM (the RECALL operation) from the nonvolatile memory.
Both the STORE and RECALL operations are also available
under software control. Logic Block Diagram
VCC
QuantumTrap
512 X 512 ROW DECODER A5
A6
A7
A8
A9
A 11 …