36Mbit synchronous SRAM for high-throughput cache and buffer applications
The CY7C1444AV33-167AXCT: It belongs to the Cypress (now Infineon) 1444A family of high-speed synchronous SRAMs designed for networking, telecom, and data-acquisition systems that need deterministic read/write latency at bus speeds above 100 MHz. The parallel interface and 36-bit wide data bus make it a natural fit for 32-bit or 36-bit processor buses, FIFO buffers, and /L3 cache in embedded systems where the memory controller expects a synchronous burst protocol.
167 MHz clock and 3.4 ns access — what they mean for timing closure
At 167 MHz the clock period is 6 ns. The 3.4 ns access time leaves 2.6 ns of the cycle for the memory controller's setup and hold, board trace delay, and output load — a tight but achievable margin on a well-laid-out 4-layer board with matched-length traces between the SRAM and the controller. The synchronous SDR (single data rate) architecture latches addresses on the rising clock edge and outputs data on the next rising edge. This pipelined flow means the controller sees a fixed latency of two clock cycles for a read, simplifying the state machine compared to asynchronous SRAM.
Infineon lists the CY7C1444AV33-167AXCT as Obsolete. No official successor or pin-compatible replacement is recorded on this line. The part is no longer manufactured and is not available through standard authorized distribution channels. The 100-TQFP footprint is common across the 1444A family, but no direct drop-in replacement from Infineon is documented.
100-TQFP package and board integration
Housed in a 100-lead TQFP with a 14x20 mm body (EIAJ standard). The commercial temperature grade (0°C to 70°C) limits deployment to indoor, temperature-controlled environments — not suitable for industrial or automotive enclosures without active cooling.