100 MHz synchronous pipeline for wide-word data buffers
The 71V3577S80BGGI is a 4.5Mbit synchronous SDR SRAM organized 128K x 36, clocked at 100 MHz with an 8 ns access time. That 36-bit word width suits DSP coefficient tables, FIFO buffers, or network packet memory where a single chip provides the full data bus without byte-lane muxing. Operating from 3.135V to 3.465V, it stays within a 3.3V nominal rail with ±5% margin — common in telecom line cards and industrial controller backplanes where the supply is regulated but not tightly post-filtered.
Industrial temperature grade and BGA layout constraints
The 119-ball PBGA (14x22 mm body) demands a 4-layer PCB minimum for fan-out — the 1.0 mm ball pitch is manageable with standard via-in-pad if the via is tented and filled. The synchronous interface registers all inputs on the rising clock edge, so the PCB trace-length matching on the address and control lines matters more than the data bus skew — a 100 MHz clock period gives 10 ns for setup plus hold, which a well-routed 4-layer board handles without series termination on short traces.
Active lifecycle — no design-in deadline
Renesas maintains this as an active catalog SRAM, so the risk of a sudden discontinuation forcing a board respin is low for the typical product lifecycle horizon.