Renesas IDT71V416VS15Y8

Overview

IDT71V416VS15Y8 from Integrated Device Technology is a 256K × 16-bit (4 Mbit), 3.3V CMOS static RAM with 15 ns access time, JEDEC-compliant center power/ground pinout, and LVTTL-compatible bidirectional I/O. It operates across industrial temperature range (–40°C to +85°C), supports byte-wide or full-word read/write via BHE/BLE, and targets high-speed buffering in telecom line cards and industrial controllers.

For engineers reviewing the IDT71V416VS15Y8 datasheet, IDT71V416VS15Y8 pinout, IDT71V416VS15Y8 application, or IDT71V416VS15Y8 equivalent, key selection criteria include its 15 ns tAA/tRC timing, SOJ-44 package with VDD/VSS symmetry, low-power standby current (ISB1 ≤ 20 mA), and dual-byte enable architecture for x8/x16 bus flexibility.

Technical Context

The IDT71V416VS15Y8 implements fully static asynchronous circuitry-no clocks or refresh required-and uses dedicated OE, CS, WE, BHE, and BLE control inputs to manage output enable, chip select, write strobe, and high/low byte selection independently. Its memory array is organized as 262,144 words × 16 bits with address lines A0–A17.

All I/Os are LVTTL-compatible with VIH ≥ 2.0 V, VIL ≤ 0.8 V, VOH ≥ 2.4 V at –4 mA, and VOL ≤ 0.4 V at 8 mA. The device guarantees tCLZ ≤ 4 ns and tOE ≤ 7 ns under industrial conditions, enabling reliable interfacing with FPGA or microcontroller data buses operating up to 66 MHz.

Key Specifications

Pinout & Package

44-pin plastic SOJ (SO44-1) package with JEDEC-standard center VDD/VSS arrangement for noise reduction. Pin 28 is NC or connectable to VSS per design option.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT71V416VS15Y8, CY7C1041DV33-15ZXC offers identical timing but mandates TSOP-II placement, while IS61LV25616AL-15TQLI requires pinout and control logic redesign-neither is drop-in, but both satisfy core 256K×16/15ns functional requirements.

Availability

IDT71V416VS15Y8 is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and medical imaging systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for IDT71V416VS15Y8 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), now part of Renesas Electronics, is a fabless semiconductor company specializing in timing, memory, interface, and RF solutions for communications and computing markets.

IDT71V416VS15Y8 belongs to IDT's legacy high-speed CMOS SRAM product line, engineered for deterministic low-latency data buffering in industrial and telecom equipment where asynchronous operation and JEDEC-compliant noise control are mandatory.

FAQ

What is the maximum operating frequency supported by the IDT71V416VS15Y8?

The IDT71V416VS15Y8 does not operate on a clock; it is an asynchronous SRAM. Its maximum effective throughput is determined by cycle time: tRC = 15 ns, supporting up to ~66 MHz sustained random access. This value reflects worst-case industrial temperature performance and assumes proper address setup/hold timing per datasheet AC specs.

Can the IDT71V416VS15Y8 be used with a 5V microcontroller interface?

No-the IDT71V416VS15Y8 is strictly a 3.3V-only device with absolute maximum input voltage of VDD + 0.5 V. Direct connection to 5V logic violates VIH/VIL limits and risks permanent damage. Level-shifting circuitry or a 3.3V-compatible controller is required for safe integration.

Does the IDT71V416VS15Y8 require external refresh circuitry?

No. The IDT71V416VS15Y8 is a fully static CMOS SRAM using asynchronous logic-no clocks, timers, or refresh cycles are needed. Data retention is indefinite as long as VDD remains within 3.0 V–3.6 V and ambient temperature stays within –40°C to +85°C.

What is the function of Pin 28 on the IDT71V416VS15Y8 SOJ package?

Pin 28 on the IDT71V416VS15Y8 is designated NC (No Connect) but may optionally be tied to VSS per board-level noise mitigation strategy. This flexibility is documented in the datasheet top-view diagram and does not affect internal functionality when left floating.

How does byte enable (BHE/BLE) operation work on the IDT71V416VS15Y8?

BHE controls I/O8–I/O15 (high byte); BLE controls I/O0–I/O7 (low byte). When only one is active low with CS and WE asserted, only that 8-bit subset is written. During reads, both must be low for full 16-bit output; otherwise, the disabled byte presents high-impedance. This enables true 8-bit sub-word access without read-modify-write overhead.