Synchronous ZBT SRAM for high-throughput buffer applications
The Renesas 71V3558S133BG is a 4.5 Mbit synchronous SRAM organized 256K x 18, built on ZBT (Zero Bus Turnaround) technology. It clocks at 133 MHz with a 4.2 ns access time.
Active production — no LTB risk
The 71V3558S133BG carries an Active lifecycle status. No last-time-buy notice or end-of-life announcement is on record.
Commercial temperature grade — indoor equipment only
Rated 0°C to 70°C, this SRAM is suited for controlled indoor environments: central-office telecom, data-center switches, test equipment, and server-class cache. Not rated for outdoor base stations, motor drives, or automotive under-hood use. The 119-PBGA package requires a multi-layer PCB with via-in-pad or microvia breakout for the fine-pitch balls.
