Renesas IDT71016S12YI

Overview

IDT71016S12YI 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 5 V supply operation, and industrial temperature range (–40°C to +85°C). It supports byte-wide or word-wide read/write via independent BHE/BLE controls and is used in real-time embedded controllers requiring deterministic memory access without refresh.

For engineers reviewing the IDT71016S12YI datasheet, IDT71016S12YI pinout, IDT71016S12YI application, or IDT71016S12YI equivalent, key selection criteria include access time consistency across CS/OE/WE control paths, low-Z output enable timing (7 ns), industrial-grade standby current (60 mA at f_MAX), and SOJ-44 package compatibility with legacy board layouts.

Technical Context

The IDT71016S12YI implements fully static asynchronous architecture with no clocks or refresh required. Its dual-byte enable (BHE/BLE) and separate OE/CS/WE inputs allow flexible bus interface modes - including word, high-byte, low-byte, and output-disabled states - all validated under industrial voltage (4.5–5.5 V) and temperature conditions.

Timing is characterized using JEDEC-standard AC test loads (255 Ω / 30 pF for t_OE, t_CLZ, etc.), with guaranteed t_AA = 12 ns, t_RC = 12 ns, and t_OE = 7 ns at V_CC = 5.0 V ±10%. All I/Os meet TTL voltage thresholds (V_IL ≤ 0.8 V, V_IH ≥ 2.2 V) and drive ±8 mA outputs.

Key Specifications

Pinout & Package

Package: 44-pin Plastic SOJ (SO44-1), JEDEC standard, 400-mil width, lead pitch 0.05 inch. Pin 1 marked by notch or dot; top-view orientation per datasheet drawing SO44-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY62167EV30LL-12ZSXIT and AS6C1008-12ZIN, the IDT71016S12YI uniquely delivers 16-bit bus width, industrial-grade 5 V operation, and hardware byte enable in a legacy SOJ-44 package-making it irreplaceable in fielded 5 V systems where PCB layout and timing margins are fixed.

Availability

IDT71016S12YI is available at Aetrix Electronics and suitable for industrial PLCs, telecom line cards, legacy bus adapters, and DSP-based instrumentation requiring stable component supply across extended lifecycle programs.

Supply support for IDT71016S12YI 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 high-performance timing, memory, and interface ICs before its acquisition by Renesas in 2019. Known for reliability in industrial and telecom markets.

IDT71016S12YI belongs to IDT's legacy high-speed CMOS SRAM product line, designed specifically for deterministic, low-latency memory interfacing in 5 V embedded control systems where refresh-free operation and industrial temperature resilience are mandatory.

FAQ

What is the maximum operating frequency supported by the IDT71016S12YI?

The IDT71016S12YI does not use a clock and therefore has no operating frequency specification. Its performance is defined by timing parameters: t_RC = 12 ns minimum cycle time implies a theoretical maximum bus transaction rate of 83.3 MHz, but actual throughput depends on system-level address/data setup/hold and control signal propagation delays. The device remains fully static-no minimum or maximum clock is required.

Does the IDT71016S12YI require external refresh circuitry?

No, the IDT71016S12YI is a fully static RAM and requires no refresh circuitry. Its CMOS latch-based memory cells retain data indefinitely as long as V_CC is applied within specification (4.5–5.5 V) and ambient temperature stays within –40°C to +85°C. This eliminates refresh overhead in microcontroller or FPGA-based systems, simplifying design and guaranteeing zero-latency access.

Can the IDT71016S12YI be used with a 3.3 V microcontroller?

The IDT71016S12YI is specified for 5 V operation only (V_CC = 4.5–5.5 V) and has TTL-compatible input thresholds (V_IH ≥ 2.2 V, V_IL ≤ 0.8 V). While its inputs may accept 3.3 V logic HIGH, its outputs swing to ~3.5 V (VOH at –4 mA), which may fall below the VIH requirement of many 3.3 V receivers. Level-shifting or buffer ICs are required for reliable interfacing with 3.3 V systems.

What is the function of the BHE and BLE pins on the IDT71016S12YI?

BHE (Bus High Enable) and BLE (Bus Low Enable) are active-low byte-select controls on the IDT71016S12YI. When BHE is low and BLE is high, only I/O8–I/O15 (high byte) are driven or latched; when BLE is low and BHE is high, only I/O0–I/O7 (low byte) are active. Both low enables full 16-bit word access. This eliminates external byte-mask logic in 8-bit peripheral interfaces or mixed-width bus architectures.

Is the IDT71016S12YI pin-compatible with other speed grades in the IDT71016 family?

Yes, all IDT71016 variants-including S12, S15, and S20-share identical 44-pin SOJ (SO44-1) and TSOP (SO44-2) packages and pinouts. The only differences are timing specifications (e.g., t_AA = 12 ns for S12, 15 ns for S15). A board designed for IDT71016S12YI can accept slower grades without layout changes, though timing margins must be re-verified for the target speed grade.