Renesas 71V424S10PHG

Overview

71V424S10PHG 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, TTL-compatible I/O, and JEDEC-standard center-power/ground pinout for noise reduction. It serves as main or buffer memory in embedded controllers, network packet buffers, and real-time data acquisition systems requiring deterministic, clockless read/write cycles.

For engineers reviewing the 71V424S10PHG datasheet, 71V424S10PHG pinout, 71V424S10PHG application, or 71V424S10PHG equivalent, key selection criteria include its 10 ns commercial-grade timing, 44-pin TSOP-II package with 400 mil width, low-power standby current (ISB = 60 mA), and support for asynchronous burst-free operation without refresh or clocks.

Technical Context

The 71V424S10PHG implements fully static asynchronous logic with no clocks or refresh required. Its address decoding and I/O control circuitry enable simultaneous read/write operations via independent Chip Select (CS), Output Enable (OE), and Write Enable (WE) inputs - all compatible with TTL voltage thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V).

It features bidirectional data lines (I/O0–I/O7) with output enable propagation delay as low as 5 ns (tOE), chip select access time of 10 ns (tACS), and fast output disable (tOHZ = 5 ns). The device uses CMOS process technology optimized for 3.3 V operation and supports both commercial (0°C to +70°C) and industrial (–40°C to +85°C) temperature grades.

Key Specifications

Pinout & Package

71V424S10PHG is housed in a 44-pin, 400 mil TSOP-II (PHG44) package with JEDEC-compliant center-power/ground pinout for reduced switching noise and improved signal integrity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY62148EV30LL-10ZSXIT and AS6C4008-10TIN, the 71V424S10PHG provides balanced performance with dedicated OE control, commercial-grade availability, and proven JEDEC pinout compatibility - making it optimal for cost-sensitive, volume production designs requiring timing predictability and broad ecosystem support.

Availability

71V424S10PHG is available at Aetrix Electronics and suitable for network infrastructure, industrial automation, medical imaging, and test equipment requiring stable component supply and long-term manufacturability.

Supply support for 71V424S10PHG 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, and enterprise applications.

The 71V424S10PHG belongs to Renesas' legacy high-speed parallel SRAM product line, designed specifically for deterministic, low-latency memory interfacing in resource-constrained embedded systems without dynamic refresh overhead.

FAQ

What is the maximum operating frequency supported by the 71V424S10PHG?

The 71V424S10PHG does not operate on a clock signal - it is an asynchronous SRAM. Its maximum effective bandwidth is determined by its 10 ns read/write cycle time (tRC), enabling up to 100 million operations per second in ideal conditions. System-level timing depends on bus controller setup/hold margins and PCB trace lengths, not an internal oscillator.

Does the 71V424S10PHG require refresh circuitry or periodic memory maintenance?

No, the 71V424S10PHG is a fully static RAM and requires no refresh cycles or background maintenance. 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 the commercial range (0°C to +70°C). This eliminates timing-critical refresh overhead in real-time systems.

Can the 71V424S10PHG be used with a 5 V microcontroller interface?

Yes - the 71V424S10PHG has TTL-compatible inputs (VIH ≥ 2.0 V, VIL ≤ 0.8 V) and outputs (VOH ≥ 2.4 V at IOH = –4 mA), allowing direct connection to 5 V-tolerant microcontrollers without level shifters. However, VDD must remain at 3.3 V ±10 %; applying 5 V to VDD will damage the 71V424S10PHG.

What is the meaning of "PHG" in the part number 71V424S10PHG?

In 71V424S10PHG, "PHG" denotes the 44-pin TSOP-II package type with 400 mil width (PHG44), as defined in Renesas' ordering nomenclature. It distinguishes this variant from the 36-pin SOJ version (PBG36, marked "YG"). The "PHG" suffix confirms mechanical compatibility with standard TSOP-II footprints and reflow profiles.

How does the 71V424S10PHG handle bus contention during write operations?

The 71V424S10PHG avoids bus contention through strict control pin sequencing: during writes, WE and CS must both be low while OE is high, forcing I/O pins into input mode. Outputs automatically enter high-impedance state (tOHZ = 5 ns) when OE is high or CS is high, preventing conflicts with other devices sharing the same data bus.