Renesas 71V424L15PHGI8

Overview

71V424L15PHGI8 from Renesas Electronics is a 4-Mbit (512K × 8) low-power, high-speed CMOS static RAM operating from a single 3.3V supply, with 15ns read cycle time, industrial temperature range (–40°C to +85°C), and JEDEC-compliant 44-pin TSOP package - used in real-time control buffers, network packet memory, and FPGA configuration storage.

For engineers reviewing the 71V424L15PHGI8 datasheet, 71V424L15PHGI8 pinout, 71V424L15PHGI8 application, or 71V424L15PHGI8 equivalent, key selection criteria include access time consistency (tAA = tACS = 15ns), TTL-compatible bidirectional I/Os, chip-select–driven standby current (ISB = 45mA max), and industrial-grade reliability without refresh circuitry.

Technical Context

The 71V424L15PHGI8 implements fully static asynchronous operation with no clocks or refresh required, using high-reliability CMOS process technology. Its address decoder drives a 4,194,304-bit memory array with equal access and cycle timing - all control inputs (CS, OE, WE) and data I/Os are TTL-compatible at 3.3V.

It features dual power management modes: dynamic standby (ISB = 45mA @ fMAX) and full static standby (ISB1 = 10mA @ f = 0), enabled by CS > VHC. Pinout follows JEDEC center-power/ground layout (VDD/VSS at pins 23/24 and 37/38) to minimize switching noise in dense PCB layouts.

Key Specifications

Pinout & Package

71V424L15PHGI8 is housed in a 44-pin, 400-mil TSOP Type II (PHG44) package with JEDEC-standard center-power/ground pinout for EMI reduction. Pin 1 is A5 (not index mark); pin 23 = VDD, pin 24 = VSS, pin 37 = VDD, pin 38 = VSS.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY62157EV30LL-15ZXI and AS6C4008-15TIN, the 71V424L15PHGI8 delivers the lowest full-standby current (10mA), fastest output disable (tCHZ = 7ns), and JEDEC-optimized pinout - making it optimal for thermally dense, real-time deterministic systems where power and noise margins are critical.

Availability

71V424L15PHGI8 is available at Aetrix Electronics and suitable for industrial PLC data buffering, network switch packet memory, and FPGA configuration storage requiring stable component supply across extended product lifecycles.

Supply support for 71V424L15PHGI8 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 71V424L15PHGI8 belongs to Renesas' legacy high-speed SRAM product line, designed specifically for deterministic, low-latency, no-refresh memory needs in industrial control, communications, and medical electronics.

FAQ

What is the maximum operating frequency supported by the 71V424L15PHGI8?

The 71V424L15PHGI8 does not operate on a clock; it is an asynchronous SRAM. Its maximum effective throughput is determined by its 15ns read cycle time (tRC), enabling up to 66.7 MHz sustained random access when interfaced with a controller capable of meeting setup/hold timing. No PLL or clock input is required - timing is governed solely by address and control signal transitions.

Does the 71V424L15PHGI8 require refresh circuitry or periodic memory maintenance?

No, the 71V424L15PHGI8 is a fully static RAM and requires no refresh cycles, clocks, or periodic maintenance. Its CMOS latch-based memory cells retain data indefinitely as long as VDD remains within specification (3.0V–3.6V) and ambient temperature stays within –40°C to +85°C. This eliminates hidden software overhead and timing uncertainty associated with DRAM refresh.

Can the 71V424L15PHGI8 be used with 5V logic interfaces?

The 71V424L15PHGI8 inputs are TTL-compatible (VIH ≥ 2.0V, VIL ≤ 0.8V) and tolerate 5V signals only if clamped to VDD + 0.5V per absolute maximum ratings - but its outputs swing only to VOH ≈ 2.4V (min) at 3.3V supply. Direct connection to 5V TTL inputs may fail; level translation or 3.3V-compatible receivers (e.g., 74LVC series) are required for reliable interfacing.

What is the significance of the "L" suffix in 71V424L15PHGI8?

The "L" in 71V424L15PHGI8 denotes the low-power variant of the IDT71V424 family. Compared to the "S" (standard power) version, the "L" variant reduces dynamic operating current (ICC) by ~10–15mA and cuts full-standby current (ISB1) from 20mA down to 10mA - achieved through optimized internal driver sizing and leakage control, without sacrificing speed or voltage tolerance.

How does the JEDEC center power/ground pinout benefit PCB layout for the 71V424L15PHGI8?

The JEDEC center power/ground pinout (VDD/VSS at pins 23/24 and 37/38) in the 71V424L15PHGI8 reduces simultaneous switching noise by balancing supply and return paths across the package. This layout minimizes ground bounce and supply droop during high-frequency I/O transitions, improving signal integrity on dense backplanes and multilayer boards - especially critical in systems with multiple parallel SRAMs sharing a common bus.