Renesas 71V65603S100BQG

Overview

71V65603S100BQG from Renesas Electronics is a 256K × 36-bit (9.44 Mbit), 3.3V synchronous ZBT™ SRAM with zero bus turnaround, 150 MHz operation (3.8 ns clock-to-data access), pipelined outputs, and 4-word burst capability. It serves as high-speed on-chip or system-level cache memory in network packet buffers, telecom switching fabrics, and FPGA co-processor data buffers.

For engineers reviewing the 71V65603S100BQG datasheet, 71V65603S100BQG pinout, 71V65603S100BQG application, or 71V65603S100BQG equivalent, key selection criteria include ZBT™ timing compliance, TQFP-100 package compatibility, industrial temperature support (–40°C to +85°C), and burst-mode control via ADV/LD and LBO pins.

Technical Context

The 71V65603S100BQG implements a fully synchronous, clock-edge-triggered architecture with dual-register pipeline stages for address/control and data I/O paths. All inputs except OE and ZZ are sampled on the rising edge of CLK, with two-cycle latency between address/control load and data transfer.

It integrates an on-chip burst counter, linear/interleaved burst sequencing controlled by static LBO, individual byte write enables (BW1–BW4), and three chip enables (CE1, CE2, CE2) supporting depth expansion. The device supports power-down mode via asynchronous ZZ input and internally synchronized output buffer enable eliminates external OE timing constraints.

Key Specifications

Pinout & Package

71V65603S100BQG is packaged in a 100-pin plastic thin quad flatpack (TQFP), JEDEC MO-140AC, 14 mm × 20 mm body, 0.5 mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV33-133AXC and AS7C3256B-15JC, the 71V65603S100BQG uniquely delivers true ZBT™ operation and integrated burst sequencing-enabling higher effective bandwidth and reduced controller complexity in telecom and networking designs.

Availability

71V65603S100BQG is available at Aetrix Electronics and suitable for network packet buffers, telecom switch fabrics, and FPGA co-processor caches requiring stable component supply across extended industrial temperature ranges.

Supply support for 71V65603S100BQG 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 delivering microcontrollers, analog, power, and memory solutions for automotive, industrial, and infrastructure markets.

The 71V65603S100BQG belongs to Renesas' high-speed ZBT™ SRAM product line, engineered specifically for zero-latency bus turnaround in packet-switching, baseband processing, and real-time control systems.

FAQ

What is the memory organization and total capacity of the 71V65603S100BQG?

The 71V65603S100BQG is organized as 256K × 36 bits, delivering a total capacity of 9,437,184 bits (9.44 Mbit). This configuration provides a 36-bit-wide data bus ideal for applications requiring high-throughput parallel data transfer, such as network packet buffering and FPGA co-processing. Its architecture supports direct connection to 36-bit processor or ASIC data paths without width conversion logic.

Does the 71V65603S100BQG support burst read and write operations, and how is burst mode controlled?

Yes, the 71V65603S100BQG supports 4-word burst operations in both read and write modes. Burst sequencing is controlled by the ADV/LD pin (to load address or advance counter) and the LBO pin (to select linear or interleaved order). A single address load initiates four consecutive data transfers, reducing address bus activity and improving effective bandwidth-critical for high-speed packet processing applications.

What is the significance of the ZBTTM feature in the 71V65603S100BQG, and how does it improve system performance?

ZBTTM (Zero Bus Turnaround) eliminates idle cycles between successive read and write operations, allowing immediate back-to-back transfers without bus contention or turnaround overhead. In the 71V65603S100BQG, this enables sustained 150 MHz throughput in mixed-access patterns-directly increasing effective bandwidth in telecom switch fabrics and network processors where bus efficiency dictates overall system latency.

Can the 71V65603S100BQG operate in industrial temperature conditions, and what are its supply voltage requirements?

Yes, the 71V65603S100BQG is qualified for industrial temperature operation from –40°C to +85°C. It requires two regulated supplies: VDD = 3.3 V ±5% for core logic and VDDQ = 3.3 V ±5% for I/O circuits. Separate VDD and VDDQ rails maintain signal integrity and reduce noise coupling, making it suitable for harsh-environment applications like base station equipment and factory automation controllers.

How does the 71V65603S100BQG handle power management, and what is the role of the ZZ pin?

The 71V65603S100BQG implements low-power operation via the asynchronous ZZ (sleep mode) pin. When ZZ is driven HIGH, the internal clock is gated and the device enters a low-power state while retaining memory contents. This reduces standby current significantly-enabling energy-efficient operation during idle periods in motion controllers or wireless infrastructure units without data loss or initialization delay.