QDR II synchronous SRAM at 167 MHz — what the clock rate means for your memory controller
The CY7C1313BV18-167BZCT is a 18Mbit QDR II synchronous SRAM from Infineon (formerly Cypress), organized 1M x 18 and clocked at 167 MHz. At that clock rate, the read and write data buses each deliver a 167 MHz double-data-rate transfer, so the memory controller must budget for a 3.0 ns cycle time on each port. The 1.7 V to 1.9 V supply rail is tighter than a standard 1.8 V ±5% — the regulator output needs to stay inside that window under load transients, or the SRAM may miss setup/hold windows on the address and control lines.
Commercial temperature grade — indoor-only deployment
Infineon lists the CY7C1313BV18-167BZCT as Obsolete. For sustainment programs — medical, defence, telecom — the only path is independent distribution or broker inventory. The 165-FBGA package (13x15 mm, 1.0 mm ball pitch) means the board footprint is fixed — any substitute must match the ball map and supply voltage.
165-FBGA footprint — layout and rework considerations
The 165-ball FBGA (13x15 mm) uses a 1.0 mm pitch array. The board requires at least four layers to fan out the inner balls; the via-in-pad or microvia approach is typical for signal integrity at 167 MHz. Reballing or replacement demands a hot-air profile that matches the 0.30 mm ball diameter — the moisture sensitivity level (MSL) should be verified from the lot date code to avoid popcorning during reflow.