Renesas 71V424S12PHGI

Overview

71V424S12PHGI from Renesas Electronics is a 4-Mbit (512K × 8) high-speed CMOS static RAM with 12 ns access and cycle times, 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 embedded controllers, network packet buffers, and real-time data acquisition systems.

For engineers reviewing the 71V424S12PHGI datasheet, 71V424S12PHGI pinout, 71V424S12PHGI application, or 71V424S12PHGI equivalent, key selection criteria include its TSOP-44 industrial-grade timing, TTL-compatible bidirectional I/Os, low standby current (55 mA dynamic ISB, 20 mA static ISB1), and absence of refresh or clock requirements.

Technical Context

The 71V424S12PHGI implements fully static asynchronous circuitry-no clocks, no refresh cycles-enabling deterministic read/write timing across its full industrial temperature range. Its dual-control architecture uses independent Chip Select (CS) and Output Enable (OE) inputs to manage device selection and output gating separately, supporting both CS-controlled and OE-controlled read cycles.

It features TTL-compatible input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V), 8-bit bidirectional data bus (I/O0–I/O7), and address decoding for A0–A18 (19 address lines). The device guarantees tAA = 12 ns, tRC = 12 ns, tOE = 6 ns, and tCHZ = 6 ns under VDD = 3.3 V ±10% and TA = –40°C to +85°C conditions.

Key Specifications

Pinout & Package

71V424S12PHGI is housed in a 44-pin, 400-mil TSOP Type II (PHG44) package with JEDEC-standard center-power/ground pinout for noise reduction. Pin 23 is VDD, Pin 24 is VSS, and Pins 1–22 and 25–44 carry address, control, and I/O signals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY62148EV30LL-45ZSXIT and AS6C4008-12ZIN, the 71V424S12PHGI uniquely delivers 12 ns industrial-grade performance in TSOP-44 with JEDEC noise-reduction pinout-making it optimal for space-constrained, thermally demanding embedded systems requiring deterministic timing.

Availability

71V424S12PHGI is available at Aetrix Electronics and suitable for industrial PLCs, network switches, medical imaging subsystems, and avionics display controllers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 71V424S12PHGI 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 trusted embedded solutions for automotive, industrial, infrastructure, and IoT applications.

The IDT71V424 family-now part of Renesas' legacy high-speed memory portfolio-was designed specifically for applications demanding reliable, low-latency, asynchronous SRAM with industrial temperature resilience and noise-immune packaging.

FAQ

What is the maximum guaranteed access time for the 71V424S12PHGI?

The 71V424S12PHGI has a maximum guaranteed address access time (tAA) of 12 ns under industrial temperature conditions (–40°C to +85°C) and VDD = 3.3 V ±10%. This value is production-tested and specified in the AC Electrical Characteristics table of the Renesas datasheet revision 05/04/21. The 71V424S12PHGI achieves this timing without requiring external clocks or refresh cycles due to its fully static architecture.

Does the 71V424S12PHGI require a refresh circuit or clock signal?

No, the 71V424S12PHGI does not require any refresh circuitry or clock signal. It is a fully static asynchronous SRAM, meaning data retention and access are controlled solely by address, CS, OE, and WE signals. This eliminates timing dependencies on system clocks and removes risk of refresh-related data loss-critical for deterministic real-time applications using the 71V424S12PHGI.

What package type and pin count does the 71V424S12PHGI use?

The 71V424S12PHGI uses a 44-pin, 400-mil TSOP Type II package (package code PHG44), as confirmed in the Renesas ordering information table and pin configuration diagrams. Its JEDEC-standard pinout places VDD and VSS at the center (Pins 23 and 24) to minimize switching noise-a key design feature of the 71V424S12PHGI.

Is the 71V424S12PHGI compatible with 3.3 V TTL logic interfaces?

Yes, the 71V424S12PHGI features TTL-compatible inputs and outputs: VIH is guaranteed ≥ 2.0 V, VIL ≤ 0.8 V, VOH ≥ 2.4 V at –4 mA, and VOL ≤ 0.4 V at 8 mA. These specifications ensure direct interoperability with standard 3.3 V microcontrollers, FPGAs, and ASICs without level-shifting components-confirming seamless integration for the 71V424S12PHGI in mixed-signal systems.

What is the standby current consumption of the 71V424S12PHGI in full standby mode?

In full standby mode (CS > VHC, no address transitions, f = 0), the 71V424S12PHGI draws a maximum of 20 mA (ISB1), as specified in Table 08 of the Renesas datasheet. This static current applies across the full industrial temperature range and enables low-power hold states in battery-backed or energy-sensitive applications using the 71V424S12PHGI.