Renesas 71V424L15PHG8

Overview

71V424L15PHG8 from Renesas Electronics is a 4-Mbit (512K × 8) low-power, high-speed CMOS static RAM operating from a single 3.3 V supply, with 15 ns read/write cycle time, industrial temperature range (–40°C to +85°C), and JEDEC-compliant center power/ground pinout for noise reduction. It serves as main or buffer memory in real-time embedded controllers requiring deterministic access and zero-refresh operation.

For engineers reviewing the 71V424L15PHG8 datasheet, 71V424L15PHG8 pinout, 71V424L15PHG8 application, or 71V424L15PHG8 equivalent, key selection criteria include its TSOP-44 package, 15 ns timing grade, low standby current (45 mA dynamic ISB, 10 mA static ISB1), TTL-compatible I/O, and dual control (CS + OE) architecture for precise bus arbitration.

Technical Context

The 71V424L15PHG8 implements fully static asynchronous logic with no clocks or refresh cycles required. Its address decoder supports 19-bit addressing (A0–A18), and bidirectional I/O0–I/O7 lines operate at TTL voltage levels with guaranteed 5 ns OE-to-output valid delay and 7 ns output disable timing.

It uses CMOS process technology optimized for low power and high reliability, with separate dynamic and full-standby current modes (ISB and ISB1). The device features center VDD/VSS pin placement per JEDEC standard to minimize simultaneous switching noise on shared power rails.

Key Specifications

Pinout & Package

44-pin, 400 mil TSOP Type II (PHG44) package with gull-wing leads, JEDEC-standard pinout featuring center-aligned VDD (pin 22) and VSS (pin 23) for reduced ground bounce.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AS7C34096B-15TIN and IS61LV5128AL-15TLI, the 71V424L15PHG8 offers superior noise immunity via JEDEC center power/ground and lower dynamic standby current-critical for industrial and avionics applications where EMI robustness and power efficiency are co-constrained.

Availability

71V424L15PHG8 is available at Aetrix Electronics and suitable for industrial PLCs, medical imaging subsystems, avionics data loggers, and test equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for 71V424L15PHG8 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 71V424L15PHG8 belongs to Renesas' legacy high-speed SRAM product line, designed specifically for deterministic, low-latency memory interfacing in real-time embedded systems where refresh-free operation and industrial-grade reliability are mandatory.

FAQ

What is the maximum operating frequency supported by the 71V424L15PHG8?

The 71V424L15PHG8 does not operate on a clock; it is an asynchronous SRAM. Its maximum effective throughput is determined by its 15 ns read/write cycle time (tRC), corresponding to a theoretical upper limit of ~66.7 MHz for consecutive random accesses. Real-world sustained bandwidth depends on bus protocol overhead, address setup/hold timing, and controller capabilities-not internal clocking.

Does the 71V424L15PHG8 require a refresh circuit or external clock signal?

No, the 71V424L15PHG8 is a fully static RAM and requires no refresh circuitry or external clock. All internal circuitry is static CMOS, enabling indefinite data retention as long as VDD is maintained within specification (3.0 V to 3.6 V) and ambient temperature remains within –40°C to +85°C. This makes the 71V424L15PHG8 ideal for battery-backed or intermittently powered systems.

What is the function of the NC pins on the 71V424L15PHG8 TSOP package?

The NC (No Connect) pins on the 71V424L15PHG8-pins 3, 4, 19, 20, 21, 24–43-are physically present for mechanical stability and package standardization but have no internal connection. They must remain unconnected in the PCB layout. Routing traces or applying solder to NC pins risks shorting or compromising signal integrity near critical VDD/VSS and I/O lines.

Can the 71V424L15PHG8 be used with a 5 V microcontroller bus?

The 71V424L15PHG8 has TTL-compatible inputs (VIH = 2.0 V min, VIL = 0.8 V max) and outputs (VOH = 2.4 V min, VOL = 0.4 V max at 3.3 V), making it interoperable with 5 V TTL logic *only* when driven through series resistors or bus transceivers that limit voltage overshoot. Direct connection to 5 V outputs violates absolute maximum VIN rating (–0.5 V to VDD+0.5 V = 3.85 V max) and risks latch-up. Use level-shifting or buffering for safe 5 V interface with the 71V424L15PHG8.

Is the 71V424L15PHG8 pin-compatible with earlier IDT-branded versions?

Yes-the 71V424L15PHG8 retains identical pinout, timing, and electrical specifications as the original IDT-branded 71V424L15PHG8. Renesas acquired IDT's memory business and continues manufacturing this part under the Renesas brand with full form-fit-function compatibility, including identical PHG44 TSOP-44 footprint, signal assignments, and DC/AC characteristics per datasheet Rev. 05/04/21.