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Renesas Electronics 71V3556S166PFGI — Discrete Semiconductors

Renesas 71V3556S166PFGI ZBT SRAM, 166 MHz, 4.5 Mbit

MPN71V3556S166PFGI
End of Life

Renesas Electronics 71V3556S166PFGI ZBT SRAM, 4.5 Mbit, 166 MHz, 3.5 ns, 128K x 36, 3.3 V, industrial temp, 100-TQFP.

$5.74Ref. price · indicative, final on quote
Renesas Electronics 71V3556S166PFGI datasheet (PDF)
Packaging100-LQFP
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

71V3556S166PFGI specifications
ParameterValue
Memory typeVolatile
MountingSurface Mount
Supply voltage3.135V ~ 3.465V
Clock frequency166 MHz
Memory interfaceParallel
Operating temperature-40°C ~ 85°C (TA)
PackageBulk
TechnologySRAM - Synchronous, SDR (ZBT)
Access time3.5 ns
Memory size4.5Mbit
Memory formatSRAM
Case100-LQFP
Memory organization128K x 36

Product details

166 MHz ZBT SRAM for high-throughput data paths

The 71V3556S166PFGI is a 4.5 Mbit synchronous SRAM using Zero Bus Turnaround (ZBT) architecture, meaning the memory bus never inserts idle cycles between read and write operations — a critical feature for packet buffers and FIFO emulation in networking gear where every clock cycle carries data. Organized as 128K words by 36 bits, the wide data bus maps directly to a 36-bit FPGA or ASIC interface without external muxing. The 166 MHz clock rate delivers a peak bandwidth of 5.97 Gbit/s (166 MHz × 36 bits), which is the actual throughput a designer budgets into the pipeline timing closure.

The 100-TQFP (14x14 mm) package has a 0.5 mm pitch that routes cleanly on a 4-layer PCB with standard via fan-out.

Active lifecycle — no end-of-life pressure for new designs

Because the part is active, sourcing is straightforward through authorized distribution channels.