Device identity and memory architecture
The CY621472E30LL-45ZSXIT is a 4 Mbit MoBL® SRAM from Infineon, organized as 256K x 16 bits with a parallel interface. The 45 ns access time and 45 ns write cycle time (word, page) set the bus timing for read and write operations — the address-to-data valid window is 45 ns max, so the controller must meet this setup/hold window at the memory interface. Operating from a 2.2 V supply rail, the device targets low-power standby and battery-backed applications where the system bus runs at 3.3 V or lower.
Housed in a 44-pin TSOP II package (surface mount), the 0.8 mm pitch and standard JEDEC footprint map directly onto a two-layer PCB without via-in-pad.
Lifecycle status and supply posture
Infineon lists the CY621472E30LL-45ZSXIT as an active product — the manufacturer continues to support new designs and production.