Renesas 71V632S7PFG8

Overview

The 71V632S7PFG8 from IDT is a 3.3V synchronous SRAM organized as 64K × 32 (2,097,152 bits), featuring pipelined outputs, single-cycle deselect, and burst counter logic. It supports 100 MHz operation with 5.5 ns clock access time, operates across commercial and industrial temperature ranges (0°C to +70°C / –40°C to +85°C), and interfaces directly with Pentium™ and PowerPC™ processors for secondary cache applications.

For engineers reviewing the 71V632S7PFG8 datasheet, 71V632S7PFG8 pinout, 71V632S7PFG8 application, or 71V632S7PFG8 equivalent, key selection considerations include its JEDEC-standard 100-pin TQFP package, 3.3V-only supply, LBO-controlled burst mode (linear/interleaved), self-timed write with global/byte write enables, and power-down control via ZZ input.

Technical Context

This device implements a synchronous pipelined architecture where address, data, and control signals are registered on the rising edge of CLK. Internal registers for address, data, and control decouple timing from external bus skew, enabling deterministic 3-1-1-1 burst read performance up to 100 MHz.

Burst sequencing is managed by an internal binary counter synchronized to CLK, with LBO selecting between linear (LBO = VSS) or interleaved (LBO = VDD) address order. Write cycles are self-timed using GW, BWE, and BW1–BW4 inputs, allowing flexible byte-level writes without external timing control.

Key Specifications

Pinout & Package

Package: 100-pin thin quad flatpack (TQFP), JEDEC standard, 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 CY7C1370D-133AXC and AS7C32098B-10JIN, the 71V632S7PFG8 uniquely delivers 100 MHz pipelined burst operation in a 3.3 V-only, TQFP-packaged device with LBO-configurable addressing-making it optimal for legacy Pentium/PowerPC cache designs where pin compatibility and burst protocol fidelity are critical.

Availability

The 71V632S7PFG8 is available at Aetrix Electronics and suitable for desktop CPU cache modules, industrial PLC data buffers, notebook memory subsystems, and networking packet FIFOs requiring stable component supply across extended lifecycles.

Supply support for 71V632S7PFG8 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

IDT (Integrated Device Technology) is a fabless semiconductor company specializing in timing, memory interface, and RF solutions, now part of Renesas Electronics.

The 71V632S7PFG8 belongs to IDT's high-speed synchronous SRAM product line, designed specifically for secondary cache and high-bandwidth buffer applications in x86 and PowerPC-based computing platforms.

FAQ

What is the maximum operating frequency supported by the 71V632S7PFG8?

The 71V632S7PFG8 supports a maximum operating frequency of 100 MHz, corresponding to a 5.5 ns clock access time. This speed grade is validated across both commercial (0°C to +70°C) and industrial (–40°C to +85°C) temperature ranges, and is specified under 3.3 V ±5% supply conditions with proper signal integrity and load conditions.

Does the 71V632S7PFG8 support true pipelined burst reads?

Yes, the 71V632S7PFG8 implements a true pipelined burst architecture. The first output data appears one clock cycle after address assertion (tCD = 5.5 ns), followed by three additional words on subsequent rising clock edges-achieving a 3-1-1-1 burst pattern essential for Pentium and PowerPC secondary cache operation.

How does the LBO pin affect burst address sequencing in the 71V632S7PFG8?

The LBO pin on the 71V632S7PFG8 selects between two burst address modes: when tied to VSS, it enables linear burst (0,1,2,3); when tied to VDD, it enables interleaved burst (0,2,1,3). This matches the native cache line ordering of PowerPC (linear) and Pentium (interleaved) processors, ensuring correct data alignment without software remapping.

Can the 71V632S7PFG8 perform byte-level writes without external timing control?

Yes, the 71V632S7PFG8 supports fully self-timed byte writes using the BWE and BW1–BW4 inputs. Each BWx controls one 8-bit byte lane, and the internal write timing logic automatically terminates the cycle once all enabled bytes are latched-eliminating the need for external wait-state generators or complex timing handshaking.

Is the 71V632S7PFG8 still recommended for new designs?

No-the 71V632S7PFG8 is marked OBSOLETE and NOT RECOMMENDED FOR NEW DESIGNS per the official IDT documentation. However, Aetrix Electronics maintains active inventory and supply chain support for legacy systems requiring long-term availability, including BOM continuity management and lifecycle coordination.