Renesas 71V65603S133PFG

Overview

71V65603S133PFG from Renesas Electronics is a 3.3V synchronous ZBT™ SRAM with 256K × 36-bit organization (9,437,184 bits), 133 MHz clock frequency (7.5 ns cycle time), zero bus turnaround architecture, and pipelined outputs. It supports 4-word burst (linear/interleaved), individual byte write control (BW1–BW4), and operates across industrial temperature range (–40°C to +85°C). Used in high-speed networking buffers and packet-switching ASIC/FPGA interfaces.

For engineers reviewing the 71V65603S133PFG datasheet, 71V65603S133PFG pinout, 71V65603S133PFG application, or 71V65603S133PFG equivalent, key selection criteria include ZBT™ timing compliance, TQFP-100 package compatibility, 3.3V I/O and core supply requirements, burst counter behavior under ADV/LD control, and industrial-grade thermal performance.

Technical Context

This SRAM implements a fully synchronous, clock-edge-triggered architecture where address, control, and data registers are sampled on the rising edge of CLK. All operations-including load, burst, deselect, and suspend-are governed by precise timing relationships defined relative to CLK, with two-cycle latency between address/control assertion and data transfer.

The device integrates an on-chip burst counter controlled by ADV/LD and LBO pins, enabling deterministic 4-word sequences without external logic. Internally synchronized OE eliminates need for external timing control, while three chip enables (CE1, CE2, CE2) support depth expansion and hierarchical memory mapping in multi-bank systems.

Key Specifications

Pinout & Package

71V65603S133PFG is packaged in a JEDEC-standard 100-pin plastic thin quad flatpack (TQFP), 14 mm × 20 mm body size, with 0.5 mm pitch. Pin 1 is located at top-left corner when notch is oriented upward.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous SRAM applications.

Compared with CY7C1362KV18-133BZC and AS7C3256A-133JCIN, the 71V65603S133PFG delivers true ZBT™ timing compliance, industrial temperature operation, and native 36-bit data width-making it optimal for high-reliability, high-throughput embedded memory subsystems where bus efficiency and thermal resilience are critical.

Availability

71V65603S133PFG is available at Aetrix Electronics and suitable for high-speed network buffers, telecom line card memory, and FPGA-based protocol accelerators requiring stable component supply, long-term lifecycle support, and industrial-grade reliability.

Supply support for 71V65603S133PFG includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Renesas Electronics is a global semiconductor leader specializing in microcontrollers, analog, power, and memory solutions for automotive, industrial, and infrastructure markets.

The 71V65603S133PFG belongs to Renesas' ZBT™ SRAM product line, engineered specifically for high-bandwidth, low-latency applications in networking equipment, base stations, and real-time control systems demanding deterministic timing and industrial environmental resilience.

FAQ

What is the memory organization and total capacity of the 71V65603S133PFG?

The 71V65603S133PFG is organized as 256K × 36 bits, delivering a total capacity of 9,437,184 bits (9.4 Mbit). This configuration provides a 36-bit wide data bus optimized for high-throughput applications such as packet buffering and FPGA co-processing, where parallel data movement reduces controller overhead and improves system-level bandwidth efficiency.

Does the 71V65603S133PFG support burst read and write operations?

Yes, the 71V65603S133PFG supports 4-word burst operations in both read and write modes. The burst sequence-linear or interleaved-is selected via the LBO pin, and the counter advances synchronously on each rising CLK edge when ADV/LD is high. Burst capability reduces address bus activity by 75% per transaction, directly improving effective bandwidth in streaming applications.

What is the significance of the ZBTTM feature in the 71V65603S133PFG?

ZBTTM (Zero Bus Turnaround) eliminates idle cycles between consecutive read and write operations. In the 71V65603S133PFG, this means the bus transitions instantly from write completion to read initiation-or vice versa-without insertion of no-operation cycles. This architecture sustains maximum bus utilization at 133 MHz, making it essential for latency-sensitive networking and real-time control systems.

How does the 71V65603S133PFG handle power management?

The 71V65603S133PFG incorporates asynchronous sleep mode via the ZZ pin: asserting ZZ high gates the internal clock and reduces power consumption to its lowest level while maintaining data retention. Additionally, CEN provides synchronous clock suspension, and the device guarantees data retention across the full industrial temperature range (–40°C to +85°C) during sleep.

What package type and pin count does the 71V65603S133PFG use?

The 71V65603S133PFG uses a JEDEC-standard 100-pin plastic thin quad flatpack (TQFP) with 0.5 mm pitch and 14 mm × 20 mm body dimensions. This package supports automated assembly, thermal dissipation up to 2.0 W, and is compatible with IPC-7351B footprint standards-ensuring manufacturability in high-volume industrial and telecom PCB production.