Device identity and synchronous SRAM pipeline
The CY7C1338G-117AXC is a 4Mbit synchronous SDR SRAM organized 128K x 32, clocked at 117 MHz with a 7.5 ns access time from the clock edge. The parallel interface and 3.15V to 3.6V supply rail place it in the mid-density synchronous SRAM class, typically used as a cache or buffer in networking, telecom, or DSP pipelines where deterministic read/write latency matters.
Package and board-fit for 100-TQFP
Housed in a 100-TQFP (14x20 mm) per the supplier device package, this surface-mount SRAM requires a 0.50 mm pitch layout — the fine-pitch QFP demands careful solder-paste stencil design and X-ray inspection after reflow to catch bridging on the inner rows. The commercial temperature grade (0°C to 70°C) limits deployment to indoor, temperature-controlled environments — not suitable for extended industrial or automotive ambient ranges without thermal management.
Obsolete lifecycle — sourcing through independent channels
No pin-compatible direct replacement from Infineon exists, so a BOM substitution requires a board spin or a functionally equivalent SRAM from a different family.
What the 117 MHz clock and 7.5 ns access mean for timing closure
The 117 MHz clock rate sets the pipeline cycle — the 7.5 ns access time is the delay from the rising clock edge to valid data on the bus, which must be budgeted into the controller's input setup/hold window. At 117 MHz, the cycle time is about 8.5 ns — the 7.5 ns access leaves roughly 1 ns of margin before the next clock edge, which tightens the PCB trace-length matching and on-die variation tolerance.