Renesas 71V424S15PHGI

Overview

71V424S15PHGI from Renesas Electronics is a 4-Mbit (512K × 8) high-speed CMOS static RAM with 15 ns read/write cycle time, single 3.3 V supply operation, and industrial temperature range (–40°C to +85°C). It features TTL-compatible bidirectional I/O, JEDEC-standard center-power/ground pinout for noise reduction, and low-power standby modes - used in real-time embedded controllers requiring deterministic memory access without refresh.

For engineers reviewing the 71V424S15PHGI datasheet, 71V424S15PHGI pinout, 71V424S15PHGI application, or 71V424S15PHGI equivalent, key selection criteria include industrial-grade timing consistency, SOJ/TSOP package compatibility, 3.3 V-only interface compliance, and asynchronous static RAM behavior in safety-critical buffering and boot code storage.

Technical Context

The 71V424S15PHGI implements fully static asynchronous logic with no clocks or refresh required. Its architecture includes independent chip select (CS), output enable (OE), and write enable (WE) controls enabling flexible bus arbitration and multi-chip memory expansion.

All address inputs (A0–A18), control signals (CS/OE/WE), and data I/Os (I/O0–I/O7) operate at TTL voltage levels with guaranteed 15 ns access and cycle times across the full industrial temperature range. Power management includes three distinct current states: dynamic active (ICC), dynamic standby (ISB), and static full standby (ISB1).

Key Specifications

Pinout & Package

44-pin, 400 mil TSOP (PHG44) package with JEDEC-standard center-power/ground pin arrangement 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 static RAM applications.

Compared with CY62148EV30LL-15ZSXIT and AS6C4008-15TIN, the 71V424S15PHGI uniquely combines industrial temperature rating, JEDEC-compliant noise-reduction pinout, and equal-access/cycle timing - making it the only option among the three qualified for ruggedized embedded systems requiring guaranteed timing across thermal extremes.

Availability

71V424S15PHGI is available at Aetrix Electronics and suitable for industrial automation, medical diagnostics, avionics display systems, and test instrumentation requiring stable component supply across long production lifecycles.

Supply support for 71V424S15PHGI 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 71V424S15PHGI belongs to Renesas' legacy high-speed CMOS SRAM product line, designed specifically for deterministic, low-latency memory in mission-critical industrial and aerospace systems where refresh-free operation and thermal robustness are mandatory.

FAQ

What is the operating temperature range of the 71V424S15PHGI?

The 71V424S15PHGI is rated for industrial operation from –40°C to +85°C. This specification is validated across all AC and DC electrical parameters in the Renesas datasheet, including access time (tAA ≤ 15 ns), cycle time (tRC ≤ 15 ns), and standby current (ISB1 ≤ 20 mA), ensuring consistent performance in harsh thermal environments typical of factory automation and outdoor electronics.

Does the 71V424S15PHGI require a refresh circuit?

No, the 71V424S15PHGI is a fully static RAM and requires no refresh circuitry. Its internal design uses bistable latching circuits that retain data indefinitely as long as power is applied. This eliminates refresh overhead, simplifies system design, and guarantees deterministic timing - a key advantage over DRAM in real-time control applications.

What package type does the 71V424S15PHGI use?

The 71V424S15PHGI uses a 44-pin, 400 mil TSOP (Thin Small Outline Package) with PHG44 package code. It follows JEDEC standard MO-141BA and features center-placed VDD and VSS pins (pins 22, 31, 21, 30) to minimize ground bounce and power supply noise during high-speed operation.

Can the 71V424S15PHGI interface directly with 3.3 V microcontrollers?

Yes, the 71V424S15PHGI has TTL-compatible inputs and outputs operating from a single 3.3 V supply. Input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V) and output drive strength (VOH ≥ 2.4 V at –4 mA, VOL ≤ 0.4 V at 8 mA) meet standard 3.3 V logic family requirements, enabling direct connection to devices such as ARM Cortex-M series MCUs and Xilinx Spartan FPGAs without level-shifting components.

What is the difference between the 'S' and 'L' suffixes in the 71V424 family?

The 'S' in 71V424S15PHGI denotes Standard Power configuration, with ICC = 160 mA and ISB = 50 mA at 15 ns speed grade. The 'L' variant (e.g., 71V424L15PHGI) offers lower dynamic current (ICC = 145 mA, ISB = 45 mA) but shares identical timing, pinout, and temperature specifications - allowing drop-in substitution where power budget is constrained.