Renesas IDT71016S12PHI

Overview

IDT71016S12PHI from Integrated Device Technology is a 64K × 16-bit (1 Mbit) high-speed CMOS static RAM with 12 ns access time, TTL-compatible I/O, single 5V supply operation, and dual byte enable (BHE/ BLE) for flexible 8-bit or 16-bit data bus interfacing - used in legacy industrial controllers, embedded instrumentation, and FPGA configuration memory buffers.

For engineers reviewing the IDT71016S12PHI datasheet, IDT71016S12PHI pinout, IDT71016S12PHI application, or IDT71016S12PHI equivalent, key selection considerations include its 44-pin SOJ package, 12 ns read cycle time, 7 ns output enable delay, low-power standby current (10 mA at CMOS-level chip deselect), and byte-selectable write capability across commercial and industrial temperature ranges.

Technical Context

The IDT71016S12PHI implements fully static asynchronous architecture with no clocks or refresh required. Its address decoding uses row/column architecture over A0–A15 inputs, supporting word, high-byte, and low-byte read/write operations via independent BHE and BLE controls.

Timing is governed by three distinct control paths: CS-controlled, OE-controlled, and WE-controlled cycles, each with validated setup/hold and transition timing (e.g., tAA ≤ 12 ns, tOE ≤ 7 ns, tWP ≥ 9 ns). All I/Os are bidirectional and TTL-compatible with VIL ≤ 0.8 V and VOH ≥ 2.4 V at 5V ±10%.

Key Specifications

Pinout & Package

Package: 44-pin Plastic SOJ (SO44-1), JEDEC standard, 400-mil width, gull-wing leads.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY62167EV30LL-45ZXC and AS6C1008-12PIN, the IDT71016S12PHI uniquely delivers 12 ns 16-bit word access in a single 5V SOJ package with native byte enable - preserving legacy timing margins and minimizing component count in retrofit industrial designs.

Availability

IDT71016S12PHI is available at Aetrix Electronics and suitable for industrial automation, legacy test equipment, and FPGA-based prototyping platforms requiring stable component supply and long-term obsolescence management.

Supply support for IDT71016S12PHI 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 U.S.-based semiconductor company specializing in timing, memory, and interface ICs before its acquisition by Renesas in 2019. It pioneered high-speed SRAM architectures for real-time embedded systems.

The IDT71016S12PHI belongs to IDT's legacy high-speed CMOS SRAM product line, designed specifically for deterministic, low-latency memory interfacing in industrial control, instrumentation, and communications infrastructure where reliability and timing predictability outweigh density or power efficiency.

FAQ

What is the operating temperature range for the IDT71016S12PHI?

The IDT71016S12PHI is rated for industrial temperature operation from −40°C to +85°C. This specification is confirmed in the "Recommended Operating Temperature and Supply Voltage" table (Table 4) and supported by DC/AC electrical characteristics tested across that full range. The 'I' suffix in the part number explicitly denotes industrial grade, and the SOJ package is qualified for thermal cycling within this envelope.

Does the IDT71016S12PHI require a refresh circuit or clock signal?

No, the IDT71016S12PHI is a fully static RAM and requires no refresh circuitry or clock input. Its internal design uses static latches and asynchronous control logic (CS, OE, WE, BHE, BLE), as stated in the Description section: "Fully static asynchronous circuitry is used, requiring no clocks or refresh for operation." This eliminates timing-critical refresh overhead in microcontroller or FPGA-based systems.

Can the IDT71016S12PHI be used with a 3.3V microcontroller interface?

The IDT71016S12PHI is specified for 5.0 V ±10% operation only and features TTL-compatible I/O thresholds (VIH ≥ 2.2 V, VIL ≤ 0.8 V). Direct connection to a 3.3V microcontroller risks violating input high-level voltage requirements and may cause unreliable reads. Level-shifting circuitry is required unless the microcontroller's 3.3V outputs meet the IDT71016S12PHI's VIH minimum under worst-case conditions.

What is the function of the BHE and BLE pins on the IDT71016S12PHI?

BHE (High Byte Enable) and BLE (Low Byte Enable) are independent active-low write controls for the upper (I/O8–I/O15) and lower (I/O0–I/O7) data bytes. When asserted with CS and WE, they allow selective 8-bit writes without affecting the opposite byte - enabling efficient partial-word updates in systems with mixed data widths or endian-sensitive protocols.

Is the IDT71016S12PHI pin-compatible with other speed grades like IDT71016S15PHI or IDT71016S20PHI?

Yes, all IDT71016 speed variants (S12/S15/S20) share identical pinouts, package dimensions, and DC/AC signaling behavior - only timing parameters differ. The S12PHI offers the fastest access (12 ns), while S15PHI and S20PHI relax timing for cost or power trade-offs. PCB layout and firmware remain unchanged across these variants, enabling drop-in timing upgrades or downgrades.