CY14B256KA

CY14B256KA 256 Kbit (32K x 8) nvSRAM with Real Time Clock Features ■ ■ 256 Kbit nvSRAM ❐ 25 ns and 45 ns access times ❐ Internally organized as 32K x 8 (CY14B256KA) ❐ Hands off automatic STORE on power down with only a small capacitor ❐ STORE to QuantumTrap nonvolatile elements is initiated by software, hardware, or AutoStore on power down ❐ RECALL to SRAM initiated on power up or by software ■ High Reliability ❐ Infinite Read, Write, and RECALL cycles ❐ 1 Million STORE cycles to QuantumTrap ❐ 20 year data retention ■ Real Time Clock ❐ Full featured Real Time Clock ❐ Watchdog timer ❐ Clock alarm with programmable interrupts ❐ Capacitor or battery backup for RTC ❐ Backup current of 0.35 uA (Typ) Industry Standard Configurations ❐ Single 3V +20%, -10% operation ❐ Industrial temperature ❐ 48-pin SSOP package ❐ Pb-free and RoHS compliance Functional Description The Cypress CY14B256KA combines a 256 Kbit nonvolatile static RAM with a full featured real time clock in a monolithic integrated circuit. The embedded nonvolatile elements incorporate QuantumTrap technology producing the world’s most reliable nonvolatile memory. The SRAM is read and written an infinite number of times, while independent nonvolatile data resides in the nonvolatile elements. The Real Time Clock function provides an accurate clock with leap year tracking and a programmable, high accuracy oscillator. The alarm function is programmable for periodic minutes, hours, days, or months alarms. There is also a pr...