Dual-port SRAM for shared-memory designs
The Renesas 70V25L15PFG is a 128Kbit dual-port asynchronous SRAM organized as 8K x 16 bits. It allows two independent bus masters — two processors, a processor and an FPGA, or a processor and a DMA controller — to access the same memory array simultaneously without arbitration logic. The 15 ns access time and 15 ns write cycle time keep up with most 16-bit microcontrollers and CPLD-based glue logic running off a single 3.3V rail (3V to 3.6V supply range). The parallel interface and 100-TQFP package (14x14 mm) fit medium-density PCB layouts where board space is available but a dual-port bridge is needed.
15 ns access — what it buys on the bus
The 15 ns access time and 15 ns write cycle time allow back-to-back read-write sequences without an extra dead cycle.
Where it fits — and where it doesn't
The 128Kbit density suits small look-up tables, FIFO emulation, register files, or shared parameter storage between two processors.