NoBL pipeline — why the bus stays busy
The CY7C1372KV25-167AXC: The NoBL (No Bus Latency) architecture on this 18 Mbit synchronous SRAM eliminates the dead cycle between read and write turns on the bus — the next access starts on the clock edge after the current one completes, rather than waiting for a turnaround cycle. At 167 MHz, that saved cycle is 6 ns per direction change, which compounds on a heavily loaded memory bus. Memory is organized 1M x 18 — the 18-bit word width suits DSP data paths, FIFO buffers, or any design that moves 16-bit payloads plus two parity/control bits per word.
Timing envelope — 3.4 ns access at 167 MHz
At a 167 MHz clock (6 ns period), the part has roughly 2.6 ns of setup/hold margin before the next clock edge — enough for a clean interface with a typical FPGA or ASIC memory controller running at the same frequency, but the PCB trace delay budget needs to stay under 0.5 ns to avoid setup violations. Supply voltage is 2.375 V to 2.625 V — a narrow 250 mV window that demands a clean 2.5 V rail with less than 3% ripple. A standard 2.5 V LDO with 1% accuracy and 10 µF output capacitance covers this, but a switching regulator needs post-filtering to stay inside the band.
Package and temperature grade
Housed in a 100-pin LQFP with a 14x20 mm body — the 0.5 mm pitch requires a 4-layer board for fan-out; two-layer breaks out only the outer rows. The exposed pad on the TQFP variant is not present on the LQFP, so thermal dissipation relies on the leadframe and board copper. Rated for commercial temperature range 0°C to 70°C — this is indoor equipment grade. Not rated for industrial or automotive ambient; if the enclosure sees above 70°C, a wider-temperature variant is needed.
Active lifecycle — sourcing posture
The base product number CY7C1372 covers the 18 Mbit NoBL family — other speed grades and temperature ranges share the same footprint and pinout, so a BOM swap to a different speed bin is a drop-in if the 167 MHz ceiling is not required.