Renesas 71V65603S100BGI8

Overview

71V65603S100BGI8 from Renesas Electronics is a 3.3V, 9-Mbit synchronous ZBT™ SRAM with 256K × 36 organization, 150 MHz clock speed (3.8 ns clock-to-data access), zero bus turnaround architecture, and pipelined outputs - designed for high-bandwidth memory subsystems in network switches, packet buffers, and telecom line cards.

For engineers reviewing the 71V65603S100BGI8 datasheet, 71V65603S100BGI8 pinout, 71V65603S100BGI8 application, or 71V65603S100BGI8 equivalent, this page delivers verified timing behavior, burst-mode control logic, industrial-grade thermal specs (–40°C to +85°C), JEDEC-standard TQFP-100 packaging, and byte-write enable mapping critical for DDR-adjacent buffer design and FPGA co-processor interfacing.

Technical Context

The 71V65603S100BGI8 implements a fully synchronous, positive-edge-triggered interface with dual-cycle latency: address/control registration on cycle N, data transfer on cycle N+2. Its ZBT™ architecture eliminates dead cycles between read/write transitions via internal burst counter and ADV/LD-controlled address loading or incrementing.

It supports 4-word linear or interleaved bursts (selected by static LBO pin), individual byte write enables (BW1–BW4), three chip enables (CE1/CE2/CE2) for depth expansion, and asynchronous OE/ZZ controls for output tri-state and sleep mode - all operating under 3.3V ±5% core (VDD) and I/O (VDDQ) supplies.

Key Specifications

Pinout & Package

71V65603S100BGI8 is packaged in a JEDEC-standard 100-pin plastic thin quad flatpack (TQFP), 14 mm × 20 mm body, with 0.5 mm pitch and exposed thermal pad (G suffix indicates green/RoHS-compliant variant).

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV33-133AXC and AS7C3256B-15JCIN, the 71V65603S100BGI8 delivers superior throughput in burst-intensive applications due to its ZBT™ architecture and 150 MHz clock, while maintaining pin-compatible TQFP-100 packaging for drop-in replacement in existing layouts requiring zero-turnaround performance.

Availability

71V65603S100BGI8 is available at Aetrix Electronics and suitable for network packet buffers, telecom line cards, FPGA co-processor caches, and high-speed protocol analyzers requiring stable component supply across industrial temperature ranges and long production lifecycles.

Supply support for 71V65603S100BGI8 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 71V65603S100BGI8 belongs to Renesas' high-performance ZBT™ SRAM product line, engineered specifically for zero-latency memory subsystems in carrier-grade networking and real-time signal processing equipment.

FAQ

What is the maximum clock frequency supported by the 71V65603S100BGI8?

The 71V65603S100BGI8 supports a maximum clock frequency of 150 MHz, delivering a 3.8 ns clock-to-data access time. This specification is guaranteed over the full industrial temperature range (–40°C to +85°C) and 3.3V ±5% supply conditions, making it suitable for high-speed packet buffering and real-time telecom applications where deterministic timing is critical.

Does the 71V65603S100BGI8 support burst read and write operations?

Yes, the 71V65603S100BGI8 supports 4-word burst operations in both linear and interleaved sequences, controlled by the LBO pin. Burst mode is initiated using the ADV/LD signal: LOW loads a new address, HIGH advances the internal counter. The 71V65603S100BGI8 executes burst reads/writes with no dead cycles between successive transfers, leveraging its ZBT™ architecture for continuous bus utilization.

What is the function of the ADV/LD pin on the 71V65603S100BGI8?

The ADV/LD pin on the 71V65603S100BGI8 serves a dual role: when sampled LOW at the rising CLK edge, it loads a new external address into the internal address register; when sampled HIGH, it advances the internal burst counter. This synchronous control enables seamless transition between single-address and burst-mode operations without external address generation logic - a key enabler for efficient FPGA or ASIC memory controllers interfacing with the 71V65603S100BGI8.

How does the ZBT™ feature improve system performance in the 71V65603S100BGI8?

The ZBT™ (Zero Bus Turnaround) feature in the 71V65603S100BGI8 eliminates idle cycles normally required when switching between read and write operations. By allowing immediate back-to-back read/write transfers on the same bus, it sustains 100% bus utilization at 150 MHz - directly increasing effective memory bandwidth in applications like network packet buffers and protocol analyzers where mixed-access patterns dominate.

What package type and footprint does the 71V65603S100BGI8 use?

The 71V65603S100BGI8 uses a JEDEC-standard 100-pin thin quad flatpack (TQFP) package, 14 mm × 20 mm body size with 0.5 mm lead pitch. The 'BGI8' suffix confirms RoHS-compliant green packaging and industrial temperature grading. This footprint is widely supported in PCB design libraries and compatible with standard reflow soldering processes, easing integration into telecom and industrial hardware platforms.