128K x 36 synchronous SRAM at 100 MHz
The Renesas 71V546S100PF is a 4.5 Mbit synchronous SRAM organized 128K words by 36 bits, with a Zero Bus Turnaround (ZBT) architecture that eliminates dead cycles between read and write operations on the same port. Clock frequency is 100 MHz with a 5 ns access time — the speed grade that sets the bus timing margin for the memory controller. The parallel interface and 36-bit word width suit systems needing a wide data path — typically network processors, DSP farms, or high-end FPGAs where a single SRAM replaces two 18-bit devices and halves the footprint.
Packaged in a 100-LQFP (100-TQFP, 14x14 mm body) with 0.5 mm pitch — a standard fine-pitch QFP that routes on a four-layer board without micro-vias. The Bulk delivery means parts ship in tubes or trays, not tape-and-reel, which is typical for prototype or low-volume production runs.
Lifecycle and compliance reality
If the BOM requires a drop-in alternative, the 128K x 36 organization and 100 MHz clock limit the pool to other ZBT synchronous SRAMs in the same package — each must be verified against the timing and supply specs.