NoBL synchronous SRAM — 18 Mbit, 100 MHz, 8.5 ns access
Housed in a 100-TQFP (14x20 mm) surface-mount package, the footprint matches the standard 100-LQFP outline used across the CY7C1371 family.
512K x 36 — what the bus width means for the design
The 36-bit data word (512K depth) is the key selection parameter for this part. A 32-bit data bus plus 4 parity/ECC bits is the typical deployment in a 32-bit processor memory system, or as a 36-bit wide buffer in a 10/40 Gbps packet processor. The 100 MHz clock delivers a peak bandwidth of 3.6 Gbps (36 bits × 100 MHz), which matches the line rate of a Gigabit Ethernet MAC with headroom for control-plane traffic.
The Infineon CY7C1371D-100AXIT is listed as Obsolete by the manufacturer. For a BOM that currently specifies this exact part, the procurement path is the independent distribution channel — last-time-buy inventory, new-old-stock, or verified surplus. Any lot received should be date-code and marking checked against Infineon's factory records, since obsolete parts see elevated remarking risk. The Tape & Reel (TR) packaging is the standard shipping form; tube or tray lots are also common in the broker channel.
Pin-compatible family — what to look for in a replacement
The base product number CY7C1371 covers multiple speed and temperature variants in the same 100-TQFP footprint. A buyer searching for a drop-in replacement should look at other CY7C1371D speed grades (e.g., -133, -167) or the CY7C1371B/C revisions — but these are also obsolete. For a new-design fit, a current-generation synchronous SRAM from the Infineon (formerly Cypress) pipeline SRAM family in a compatible 100-pin QFP package would require a PCB layout review; the NoBL bus protocol is proprietary and not matched by standard synchronous SRAMs.