Renesas 71V424S10PHGI

Overview

71V424S10PHGI from Renesas Electronics is a 4-Mbit (512K × 8) high-speed CMOS static RAM with 10 ns access time, single 3.3 V supply operation, industrial temperature range (–40°C to +85°C), and JEDEC-compliant center-power/ground pinout. It serves as a fast, asynchronous, fully static memory buffer in real-time control systems requiring deterministic read/write latency without refresh.

For engineers reviewing the 71V424S10PHGI datasheet, 71V424S10PHGI pinout, 71V424S10PHGI application, or 71V424S10PHGI equivalent, key selection criteria include its 10 ns tAA/tRC timing, TSOP-44 industrial-grade packaging, TTL-compatible bidirectional I/Os, low 60 mA ISB standby current, and dual-control write enable (WE) and chip select (CS) architecture.

Technical Context

The 71V424S10PHGI implements fully static asynchronous logic with no clocks or refresh cycles required. Its address decoder drives a 4,194,304-bit memory array organized as 512K × 8, supporting concurrent address, data, and control transitions under strict AC timing constraints.

It features separate WE and CS inputs enabling both WE-controlled and CS-controlled write cycles, with guaranteed tWP ≥ 8 ns and tDW ≥ 6 ns. Output enable (OE) provides sub-5 ns output activation (tOE ≤ 5 ns), and the device maintains high-Z states during deselect (tCHZ ≤ 5 ns) or write disable (tWHZ ≤ 6 ns).

Key Specifications

Pinout & Package

44-pin, 400 mil TSOP Type II package (PHG44) with JEDEC-standard center-power/ground layout for noise reduction. Pin 1 marked by notch or dot; top view shown in datasheet drawing 3622 drw 11.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed SRAM applications.

Compared with CY62148EV30LL-10ZSXI and AS6C4008-10TIN, the 71V424S10PHGI uniquely combines TSOP-44 industrial qualification, JEDEC noise-optimized pinout, and 60 mA ISB-enabling drop-in replacement in existing PHG44 layouts without thermal or timing compromise.

Availability

71V424S10PHGI is available at Aetrix Electronics and suitable for industrial PLCs, telecom line cards, medical imaging subsystems, and automotive ADAS modules requiring stable component supply across extended product lifecycles.

Supply support for 71V424S10PHGI 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 Corporation is a global semiconductor leader delivering microcontrollers, analog, power, and memory solutions for automotive, industrial, infrastructure, and IoT applications.

The 71V424S10PHGI belongs to Renesas' legacy high-speed SRAM product line, engineered specifically for deterministic, low-latency memory interfacing in real-time embedded systems where refresh-free operation and industrial reliability are mandatory.

FAQ

What is the maximum clock frequency supported by the 71V424S10PHGI?

The 71V424S10PHGI is an asynchronous SRAM and does not use a clock signal. Its performance is defined by timing parameters such as tRC (10 ns read cycle time), enabling effective operation in systems with up to 100 MHz bus bandwidth when interfaced with appropriate address/data setup/hold margins. The 71V424S10PHGI relies on control signals (CS, WE, OE) rather than a system clock for synchronization.

Does the 71V424S10PHGI require refresh circuitry?

No, the 71V424S10PHGI is a fully static RAM and requires no refresh cycles. Its CMOS latch-based memory cells retain data indefinitely as long as VDD remains within specification (3.0 V to 3.6 V) and temperature stays within –40°C to +85°C. This eliminates refresh overhead in microcontroller or FPGA-based designs, simplifying firmware and timing-critical applications.

Can the 71V424S10PHGI operate at 3.0 V supply voltage?

Yes, the 71V424S10PHGI is fully specified down to 3.0 V VDD across the industrial temperature range. DC parameters including VOL (≤0.4 V), VOH (≥2.4 V), and ICC (≤180 mA dynamic) are guaranteed at VDD = 3.0 V, making it suitable for brown-out resilient systems and battery-backed operation where rail voltage may dip near minimum spec.

What is the meaning of "PHGI" in the part number 71V424S10PHGI?

In 71V424S10PHGI, "PHG" denotes the 44-pin TSOP Type II package (PHG44), and "I" indicates industrial temperature grade (–40°C to +85°C). The "S" identifies the standard power variant (vs. "L" for low power), and "10" specifies the 10 ns speed grade. Thus, 71V424S10PHGI is the industrial-grade, standard-power, 10 ns TSOP-44 version of the IDT71V424 family.

Is the 71V424S10PHGI pin-compatible with other members of the 71V424 family?

Yes, all 71V424 variants-including 71V424S10PHGI, 71V424L12PHG, and 71V424S15YGI-share identical 44-pin TSOP (PHG44) and 36-pin SOJ (PBG36) pinouts. Signal assignments (A0–A18, CS, WE, OE, I/O0–I/O7, VDD, VSS) and NC pin locations are fixed across speed grades and power variants, enabling hardware-compatible upgrades or substitutions within the same package type.