6.5 ns access, 133 MHz pipeline — synchronous SRAM for high-throughput data buffering
The Infineon (Cypress) CY7C1365C-133BZI is an 8 Mbit synchronous SRAM organized as 256K x 32 bits, clocked at 133 MHz with a 6.5 ns access time. This is a single-data-rate (SDR) synchronous SRAM, meaning it transfers one data word per clock cycle — a fit for networking buffers, cache tag stores, and DSP scratchpad memory where deterministic read/write latency matters more than double-data-rate throughput.
Obsolete — last-time-buy window closed, sourcing through independent distribution
256K x 32 organization — bus width matching and address decoding
The 256K x 32 memory organization means the part presents a 32-bit wide data bus and requires 18 address lines (256K = 2^18). This is a natural fit for 32-bit microcontrollers, DSPs, or FPGAs with a parallel memory controller. The 8 Mbit total density is sized for moderate-depth FIFO buffers, look-up tables, or cache tag storage. The synchronous interface registers all address, data, and control inputs on the rising edge of the 133 MHz clock, which simplifies timing closure in high-speed digital designs compared to asynchronous SRAM.
165-ball FBGA (13x15 mm) — layout and decoupling considerations
The package is a 165-ball fine-pitch ball grid array, 13x15 mm body. This is a surface-mount BGA requiring controlled impedance routing for the 32-bit data bus and the 133 MHz clock trace. Supply decoupling should follow the manufacturer's recommendations for synchronous SRAM — typically one 0.1 µF ceramic per supply pin pair, placed as close to the balls as the board stack-up allows.