Renesas IDT71V416VL15PH8

Overview

IDT71V416VL15PH8 from Integrated Device Technology is a 4-Mbit (256K × 16) high-speed CMOS static RAM with 15 ns access time, single 3.3 V supply operation, and JEDEC-compliant center power/ground pinout for noise reduction. It supports byte-wide and word-wide read/write via independent BHE/BLE controls and operates across industrial temperature range (–40°C to +85°C) in 44-pin SOJ package.

For engineers reviewing the IDT71V416VL15PH8 datasheet, IDT71V416VL15PH8 pinout, IDT71V416VL15PH8 application, or IDT71V416VL15PH8 equivalent, key selection criteria include its 15 ns tAA/tRC timing, LVTTL-compatible bidirectional I/Os, low-power standby current (ISB1 = 10 mA max), and industrial-grade reliability in legacy memory subsystems requiring deterministic asynchronous access.

Technical Context

The IDT71V416VL15PH8 implements fully static asynchronous architecture-no clocks or refresh required-and uses dual-byte enable (BHE/BLE) to support 8-bit or 16-bit data transfers without external logic. Its address decoding covers A0–A17 (18-bit), enabling full 256K-word addressing with chip select (CS), output enable (OE), and write enable (WE) controlling device state transitions.

Timing is defined by three independent control paths: CS-driven, OE-driven, and byte-enable-driven read cycles, each with validated low-Z and high-Z transition specs (e.g., tCLZ = 4 ns, tCHZ = 7 ns). All I/Os are LVTTL-compatible with VIH(min) = 2.0 V and VIL(max) = 0.8 V at VDD = 3.0–3.6 V, ensuring interoperability with 3.3 V logic families.

Key Specifications

Pinout & Package

Package: 44-pin, 400-mil plastic SOJ (SO44-1), JEDEC-standard footprint with center VDD/VSS arrangement for reduced switching noise.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY62148EV30LL-45ZAXI and AS6C4008-15TIN, the IDT71V416VL15PH8 uniquely delivers 16-bit width, 15 ns timing, and industrial temperature rating in a single 44-pin SOJ - eliminating bus widening, timing margining, or voltage translation in 3.3 V embedded designs.

Availability

IDT71V416VL15PH8 is available at Aetrix Electronics and suitable for industrial PLCs, telecom line cards, medical imaging subsystems, and avionics display controllers requiring stable component supply and long-term obsolescence management.

Supply support for IDT71V416VL15PH8 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

Integrated Device Technology (IDT) was a fabless semiconductor company specializing in timing, memory interface, RF, and power management ICs before its acquisition by Renesas in 2019. Known for high-reliability memory and clock solutions.

The IDT71V416VL15PH8 belongs to IDT's legacy 3.3 V high-speed SRAM product line, engineered for deterministic asynchronous access in industrial and telecom infrastructure where refresh-free operation and noise-immune packaging are mandatory.

FAQ

What is the maximum operating frequency supported by the IDT71V416VL15PH8?

The IDT71V416VL15PH8 does not operate on a clock; it is an asynchronous SRAM. Its performance is specified by access and cycle times-not frequency. With tRC = 15 ns, the maximum sustained random read/write rate is approximately 66.7 MHz (1 / 15 ns), assuming ideal bus turnaround. Real-world throughput depends on system-level timing margins and bus protocol overhead.

Does the IDT71V416VL15PH8 require external refresh circuitry?

No, the IDT71V416VL15PH8 is a static RAM and contains no capacitive storage cells. It uses fully static CMOS latches for data retention, so it requires no refresh cycles, clocks, or periodic access to maintain data-making it ideal for low-power or timing-critical embedded applications where deterministic behavior is essential.

Can the IDT71V416VL15PH8 be used with a 5 V microcontroller interface?

No-the IDT71V416VL15PH8 is strictly a 3.3 V LVTTL device. Its absolute maximum input voltage is VDD + 0.5 V (≤4.1 V), and VIH(min) is 2.0 V. Direct connection to 5 V logic risks damage and violates DC operating conditions. A level-shifting solution (e.g., TXB0108 or discrete MOSFET translators) is required for interoperability with 5 V systems.

What is the function of Pin 28 on the IDT71V416VL15PH8 SOJ package?

Pin 28 on the IDT71V416VL15PH8 is designated NC* (No Connect, optional ground). Per the datasheet, it may be left unconnected or tied to VSS for improved noise immunity. It is not electrically bonded internally and carries no signal or power function-its use is purely mechanical or EMI-mitigation related.

How does byte enable operation work on the IDT71V416VL15PH8 during write cycles?

During a write cycle, asserting BLE = L enables writing to I/O0–I/O7 (low byte), while asserting BHE = L enables writing to I/O8–I/O15 (high byte). Both can be asserted simultaneously for full 16-bit writes. Critically, when only one byte enable is active, the opposite byte remains unchanged-enabling atomic partial updates without read-modify-write sequences.