8 Mbit in a 512K x 16 organization — bus-width decision for the system architect
The CY62157DV30LL-45ZSXI is an 8 Mbit asynchronous SRAM organized as 512K words by 16 bits. The 16-bit data bus means a single chip fills a 16-bit memory interface without byte-lane ganging — the address bus needs 19 lines (A0–A18) to map the full 512K word space. Both the access time and the write cycle time (word, page) are specified at 45 ns. At a 45 ns access, the memory controller has roughly 22 ns of setup margin on a 20 MHz bus after accounting for PCB trace delay and output hold — tight enough that the layout engineer should route the data lines with matched length to the SRAM footprint.
Industrial temperature grade and TSOP II footprint — deployment envelope for the BOM engineer
The 44-TSOP II package (0.400-inch body width, 10.16 mm) is a surface-mount form factor common in embedded systems, but the 0.400-inch width is narrower than the 0.525-inch wide-body TSOP-44 — a layout that expects the wider package will have clearance issues on the outer pins. The MoBL series is Infineon's low-power asynchronous SRAM family, optimized for standby current in battery-backed real-time-clock and configuration-store applications.
Active lifecycle and compliance — sourcing posture for the procurement desk
The product status is Active, meaning Infineon continues to manufacture the CY62157DV30LL-45ZSXI without a last-time-buy or end-of-life notice. ROHS3 compliant — no exemption-based restrictions for EU markets.