Renesas 71V632S7PFG

Overview

71V632S7PFG from IDT (Integrated Device Technology) 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 clock access times of 5.5 ns (100 MHz), 6.6 ns (83 MHz), and 7.7 ns (66 MHz) across commercial and industrial temperature ranges, and is designed for secondary cache in Pentium™ and PowerPC™ processor systems.

For engineers reviewing the 71V632S7PFG datasheet, 71V632S7PFG pinout, 71V632S7PFG application, or 71V632S7PFG equivalent, key selection considerations include its JEDEC-standard 100-pin TQFP package, 3.3V-only supply, LBO-controlled linear/interleaved burst mode, self-timed write with global/byte write enable, and ZZ-controlled power-down - all critical for high-speed embedded memory interfacing.

Technical Context

The 71V632S7PFG implements a synchronous pipelined architecture with internal address register, burst counter, and output register stages. Its clock-driven operation enables deterministic timing: first data appears one clock cycle after ADSP assertion, followed by three more burst words on successive rising edges.

It supports two distinct write modes: global write (GW) for full-word writes and byte-write enable (BWE + BW1–BW4) for selective 8-bit updates. The LBO pin statically configures burst address sequencing (linear or interleaved), while ZZ input places the device into low-power sleep mode without requiring state retention.

Key Specifications

Pinout & Package

71V632S7PFG is packaged in a JEDEC-standard 100-pin thin quad flatpack (TQFP), 14 mm × 20 mm body size, with 0.5 mm lead pitch. Pin 1 is located at top-left corner (marked by dot or bevel), and pin numbering proceeds counterclockwise.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1370D-133AXC and IS61WV102432BLL-10TLI, the 71V632S7PFG uniquely delivers Pentium/PowerPC-aligned burst behavior, single-cycle deselect, and integrated pipelining - making it irreplaceable for legacy high-speed cache designs despite its obsolescence status.

Availability

71V632S7PFG is available at Aetrix Electronics and suitable for industrial control systems, legacy processor upgrades, and high-reliability embedded memory applications requiring stable component supply and long-term lifecycle support.

Supply support for 71V632S7PFG 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) was a fabless semiconductor company specializing in high-performance timing, memory, and interface solutions before its acquisition by Renesas in 2019. Known for precision clocking and fast SRAMs used in computing and communications infrastructure.

The 71V632S7PFG belongs to IDT's 71V family of pipelined synchronous SRAMs, engineered specifically to serve as secondary cache memory for x86 and PowerPC-based systems demanding sub-10 ns access and deterministic burst timing.

FAQ

What is the maximum operating frequency supported by the 71V632S7PFG?

The 71V632S7PFG supports a maximum clock frequency of 100 MHz, corresponding to a 5.5 ns clock access time. This rating applies to the commercial temperature range (0°C to +70°C); at industrial temperatures (–40°C to +85°C), the guaranteed maximum is 83 MHz (6.6 ns). Frequency selection is fixed per speed grade - the "S7" suffix denotes the 7.7 ns / 66 MHz variant, but datasheet confirms full 100 MHz capability under commercial conditions.

Does the 71V632S7PFG support both linear and interleaved burst modes?

Yes, the 71V632S7PFG supports both linear and interleaved burst modes via the LBO (burst order) pin. When LBO is tied to VSS, the device executes linear burst (00→01→10→11); when tied to VDD, it performs interleaved burst (00→10→01→11). This matches Pentium (interleaved) and PowerPC (linear) cache line ordering requirements directly - a key feature confirmed in the functional description and burst sequence tables.

Is the 71V632S7PFG pin-compatible with other members of the 71V632 family?

Yes, all 71V632 variants - including 71V632S7PFG - share identical 100-pin TQFP packaging and pinout. Differences are limited to speed grade (S5/S6/S7), temperature range (commercial vs. industrial), and marking; electrical and mechanical interfaces remain fully consistent across the family, enabling drop-in replacement within same-grade bins.

How does the ZZ pin function in the 71V632S7PFG?

The ZZ pin on the 71V632S7PFG controls self-timed power-down mode. When asserted low, it places the device into a low-power sleep state drawing ≤10 µA, with outputs entering high-impedance. Recovery requires ZZ return to high *and* device deselection (CE/CS high) before reactivation - a requirement explicitly stated in the timing waveform notes and truth tables for reliable state restoration.

What are the voltage requirements for VDD and VDDQ on the 71V632S7PFG?

The 71V632S7PFG requires a single 3.3V supply with tolerance of +10% / –5%, meaning VDD and VDDQ must both be maintained between 3.135 V and 3.63 V. Both rails are internally decoupled but must be externally stabilized with appropriate bypass capacitors; VDD powers core logic, while VDDQ references the I/O buffers - a separation confirmed in the DC operating conditions table and pin configuration diagram.