NVSRAM with 45 ns access — no battery needed
The CY14B101KA-ZS45XI is a 1 Mbit Non-Volatile SRAM from Infineon, organized as 128K x 8 bits. It combines the fast read/write cycles of an SRAM (45 ns access time) with automatic non-volatile storage on power loss, eliminating the battery, supervisor IC, and serial EEPROM that a standard SRAM backup scheme requires. The parallel interface and 2.7V to 3.6V supply range make it a drop-in replacement for battery-backed SRAM sockets in industrial controllers, PLCs, and metering equipment where data retention across power cycles is mandatory.
