Renesas IDT71V416VS10PH

Overview

IDT71V416VS from Integrated Device Technology is a 4-Mbit (256K × 16) high-speed CMOS static RAM with 10 ns access time, single 3.3 V supply operation, and JEDEC-standard center-power/ground pinout for noise reduction. It supports byte-wide and word-wide read/write operations via dedicated BHE/BLE controls and is used in embedded controllers, network packet buffers, and FPGA configuration memory subsystems.

For engineers reviewing the IDT71V416VS datasheet, IDT71V416VS pinout, IDT71V416VS application, or IDT71V416VS equivalent, key selection criteria include its 10 ns commercial-grade timing, LVTTL-compatible bidirectional I/O, low-Z output enable response (5 ns), and SOJ-44 package compatibility with legacy board layouts.

Technical Context

The IDT71V416VS implements fully static asynchronous logic with no clocks or refresh required. Its architecture includes independent high-byte (I/O8–I/O15) and low-byte (I/O0–I/O7) write enable paths, dual OE/CS control for fast output gating, and address-access-limited tAA = 10 ns at VDD = 3.0–3.6 V and TA = 0°C to +70°C.

It uses standard CMOS process technology with LVTTL input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V) and guarantees dynamic ICC ≤ 200 mA and standby ISB ≤ 70 mA under full cycling conditions. Input/output capacitance is characterized at 7 pF (CIN) and 8 pF (CI/O) at 1 MHz.

Key Specifications

Pinout & Package

Package: 44-pin, 400-mil plastic SOJ (SO44-1), JEDEC-standard center-power/ground layout for reduced switching noise.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY62167EV30LL-10ZSXI and AS6C4008-10PCN, the IDT71V416VS offers verified SOJ-44 compatibility and lower dynamic current, making it optimal for space-constrained commercial designs requiring proven board-level interoperability without layout change.

Availability

IDT71V416VS is available at Aetrix Electronics and suitable for network packet buffering, FPGA configuration storage, and industrial PLC data logging requiring stable component supply and long-term obsolescence management.

Supply support for IDT71V416VS 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, RF, and high-performance interconnect solutions.

The IDT71V416VS belongs to IDT's legacy 3.3 V parallel SRAM product line, designed for cost-sensitive, high-reliability embedded systems requiring pin-compatible drop-in memory upgrades in commercial temperature environments.

FAQ

What is the maximum operating frequency supported by the IDT71V416VS?

The IDT71V416VS does not operate on a clock signal-it is an asynchronous SRAM. Its performance is defined by timing parameters: tRC = 10 ns read/write cycle time implies effective throughput up to 100 MHz in ideal burst scenarios, but actual system speed depends on bus protocol overhead and controller timing margins. The 10 ns tAA specifies the fastest guaranteed address-to-data delay.

Does the IDT71V416VS require a refresh circuit or external clock?

No, the IDT71V416VS is a fully static RAM and requires neither refresh circuitry nor an external clock. Its internal latches retain data as long as VDD is applied and CS remains asserted. This eliminates timing-critical refresh scheduling and simplifies integration with microcontrollers lacking DRAM controllers.

Can the IDT71V416VS be used with 5 V logic systems?

No-the IDT71V416VS is strictly a 3.3 V device with LVTTL input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V) and absolute max ratings limiting VIN to VDD + 0.5 V. Direct connection to 5 V buses risks damage. Level translation (e.g., TXB0108) is required for interfacing with 5 V microcontrollers or FPGAs.

What is the function of Pin 28 on the IDT71V416VS SOJ package?

Pin 28 on the IDT71V416VS SOJ package is designated NC* (No Connect), meaning it has no internal connection and may be left unconnected or tied to VSS per board layout requirements. The datasheet explicitly states "Pin 28 can either be a NC or connected to Vss", confirming its optional grounding for mechanical stability or noise suppression.

How does the IDT71V416VS handle byte-wide versus word-wide writes?

The IDT71V416VS uses dedicated BHE (high-byte enable) and BLE (low-byte enable) inputs to control write granularity. When only BHE is active, I/O8–I/O15 are written; when only BLE is active, I/O0–I/O7 are written; when both are active, the full 16-bit word is updated. This eliminates need for external byte masking logic and reduces write-cycle overhead in 8-bit peripheral interfaces.