Infineon 4Mbit 45ns NVRAM, 44-Pin TSOP, CY14B104LA-ZS45XI / 1949074

The Cypress CY14B104LA/CY14B104NA is a fast static RAM (SRAM), with a non-volatile element in each memory cell. The memory is organized as 512K bytes of 8 bits each or 256K words of 16-bits each. The embedded non-volatile elements incorporate QuantumTrap technology, producing reliable non-volatile memory. The SRAM provides infinite read and write cycles, while independent non-volatile data resides in the highly reliable QuantumTrap cell. Data transfers from the SRAM to the non-volatile elements (the STORE operation) takes place automatically at power-down. On power-up, data is restored to the SRAM (the RECALL operation) from the non-volatile memory. Both the STORE and RECALL operations are also available under software control.