Renesas IDT71016S12YI8

Overview

IDT71016S12YI8 from Integrated Device Technology is a 64K × 16-bit (1 Mbit) high-speed CMOS static RAM with 12 ns access time, 5 V single-supply operation, TTL-compatible I/O, and dual byte enable (BHE/BLE) for selective 8-bit access in embedded control and data acquisition systems.

For engineers reviewing the IDT71016S12YI8 datasheet, IDT71016S12YI8 pinout, IDT71016S12YI8 application, or IDT71016S12YI8 equivalent, key selection criteria include industrial temperature range (–40°C to +85°C), 44-pin SOJ package compatibility, byte-selectable read/write timing, and low standby current (10 mA at CMOS-level chip deselect).

Technical Context

The IDT71016S12YI8 implements fully static asynchronous architecture-no clocks or refresh required-and uses bidirectional TTL-compatible I/O buffers with independent high- and low-byte enables (BHE/BLE) to support 8-bit or 16-bit data bus configurations. Its output enable (OE) path achieves 7 ns propagation delay, enabling fast read cycles without requiring address hold after OE assertion.

Chip select (CS) and write enable (WE) are fully decoded with overlapping timing windows supporting three distinct write control modes: WE-controlled, CS-controlled, and byte-enable-controlled. All DC and AC parameters-including tAA = 12 ns, tRC = 12 ns, and ISB1 = 10 mA-are guaranteed over the full industrial temperature range (–40°C to +85°C) and 4.5 V–5.5 V supply.

Key Specifications

Pinout & Package

Package: 44-pin Plastic SOJ (SO44-1), JEDEC-standard footprint, 400-mil width, lead pitch 0.05 inch.

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 IDT71016S12YI8 uniquely delivers 12 ns 16-bit word access at 5 V in a single SOJ package-critical for maintaining legacy 5 V controller compatibility without sacrificing performance or increasing component count.

Availability

IDT71016S12YI8 is available at Aetrix Electronics and suitable for industrial PLCs, telecom line cards, medical imaging subsystems, and DSP co-processor modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for IDT71016S12YI8 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, Inc. (IDT) was a fabless semiconductor company specializing in timing, memory, interface, and RF solutions before its acquisition by Renesas Electronics in 2019.

The IDT71016 product line was designed for high-reliability, fully static memory applications in industrial automation, telecommunications infrastructure, and test equipment where zero-refresh operation and deterministic timing were mandatory.

FAQ

What is the maximum operating frequency supported by the IDT71016S12YI8?

The IDT71016S12YI8 does not use a clock and therefore has no operating frequency specification. Its performance is defined by timing parameters: minimum read cycle time (tRC) is 12 ns, corresponding to a maximum effective throughput of approximately 83 MHz for consecutive reads. This asynchronous behavior eliminates clock skew concerns in mixed-signal systems.

Does the IDT71016S12YI8 require external refresh circuitry?

No, the IDT71016S12YI8 is a fully static RAM and requires no refresh cycles or external refresh circuitry. Its CMOS latch-based memory cells retain data indefinitely as long as power is applied and CS remains asserted or in CMOS-level standby (ISB1 mode). This simplifies system design for safety-critical and real-time applications.

Can the IDT71016S12YI8 be used with a 3.3 V microcontroller interface?

The IDT71016S12YI8 is specified for 5 V ±10% operation and features TTL-compatible inputs (VIH ≥ 2.2 V, VIL ≤ 0.8 V), but its outputs swing rail-to-rail (0 V to VCC). Direct connection to a 3.3 V microcontroller risks overvoltage damage to input pins. A level-shifting solution or voltage-tolerant I/O buffer is required for safe interoperability.

What is the function of the BHE and BLE pins on the IDT71016S12YI8?

The BHE (Bus High Enable) and BLE (Bus Low Enable) pins on the IDT71016S12YI8 independently control access to the upper (I/O8–I/O15) and lower (I/O0–I/O7) bytes of the 16-bit data bus. When asserted low with CS and WE, they permit byte-selective writes-enabling efficient updates of individual 8-bit fields without reading-modifying-writing the full 16-bit word.

Is the IDT71016S12YI8 still recommended for new designs?

No-the IDT71016S12YI8 was marked "Not recommended for new designs" in August 2000, and that notice was removed in February 2001 per the datasheet revision history. While technically viable and supported through legacy channels, modern designs should evaluate drop-in alternatives with extended longevity, RoHS compliance, and enhanced power efficiency unless backward compatibility is mandatory.