Renesas IDT71016S12PHI8

Overview

IDT71016S12PHI8 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, and dual byte enable (BHE/BLE) for selective 8-bit data access. It operates from a single 5.0 V ±10% supply, supports commercial and industrial temperature ranges (–40°C to +85°C), and is used in embedded controllers, network interface buffers, and real-time data acquisition systems requiring deterministic, clockless memory access.

For engineers reviewing the IDT71016S12PHI8 datasheet, IDT71016S12PHI8 pinout, IDT71016S12PHI8 application, or IDT71016S12PHI8 equivalent, key selection criteria include its 12 ns tAA, bidirectional TTL-compatible I/O0–I/O15, low-power standby current (10 mA at CMOS-level chip deselect), and JEDEC-standard 44-pin Plastic SOJ package compatibility with legacy SRAM-based designs.

Technical Context

The IDT71016S12PHI8 implements fully static asynchronous circuitry-no clocks or refresh required-and uses address-controlled read/write cycles with independent chip select (CS), output enable (OE), write enable (WE), and byte enable (BHE/BLE) logic. Its architecture enables word, high-byte, or low-byte read/write operations without external latching.

Timing is governed by three distinct control paths: CS-controlled, OE-controlled, and BHE/BLE-controlled cycles, each with validated setup/hold and transition-to-valid delays (e.g., tCLZ = 4 ns, tOE = 7 ns). All inputs meet TTL voltage thresholds (VIH ≥ 2.2 V, VIL ≤ 0.8 V), and outputs drive ±4 mA/±8 mA loads while maintaining VOL ≤ 0.4 V and VOH ≥ 2.4 V under worst-case VCC min.

Key Specifications

Pinout & Package

Package: 44-pin Plastic SOJ (SO44-1), JEDEC-standard 400-mil body, lead pitch 0.050", compliant with MIL-STD-883 Class B.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY62167EV30LL-45ZSXI and AS6C1008-12PIN, the IDT71016S12PHI8 delivers true 5 V TTL-compatible 16-bit parallel access at 12 ns without voltage translation or bus widening, making it uniquely suited for drop-in replacement in legacy industrial and telecom hardware.

Availability

IDT71016S12PHI8 is available at Aetrix Electronics and suitable for industrial PLCs, legacy network interface cards, medical imaging subsystems, and avionics display controllers requiring stable component supply across extended product lifecycles.

Supply support for IDT71016S12PHI8 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 solutions before its acquisition by Renesas in 2019. It pioneered high-performance CMOS SRAMs for real-time embedded systems.

The IDT71016S12PHI8 belongs to IDT's legacy high-speed parallel SRAM product line, designed specifically for deterministic, low-latency memory access in 5 V microprocessor and DSP-based systems where refresh-free operation and TTL compatibility were critical.

FAQ

What is the maximum operating frequency supported by the IDT71016S12PHI8?

The IDT71016S12PHI8 does not operate on a clock; it is an asynchronous SRAM. Its maximum effective throughput is determined by its 12 ns read cycle time (tRC), enabling up to 83.3 MHz sustained random-access bandwidth. This value is derived directly from the datasheet's tRC = 12 ns specification under industrial conditions and reflects guaranteed performance without refresh or synchronization overhead.

Does the IDT71016S12PHI8 require external pull-up resistors on its I/O lines?

No, the IDT71016S12PHI8 does not require external pull-up resistors on I/O0–I/O15. Its outputs are actively driven to valid TTL logic levels (VOH ≥ 2.4 V, VOL ≤ 0.4 V) with specified sink/source capability (8 mA/–4 mA), and inputs meet standard TTL thresholds (VIH ≥ 2.2 V, VIL ≤ 0.8 V), eliminating the need for passive termination in properly terminated 5 V systems.

Can the IDT71016S12PHI8 be used in a 3.3 V system?

No, the IDT71016S12PHI8 is strictly a 5 V device with absolute maximum VCC = 5.5 V and minimum operating VCC = 4.5 V. Applying 3.3 V will result in non-functional operation, as its internal CMOS logic thresholds and I/O drive strength are designed for 5 V rail compliance. Use only in verified 5 V environments.

How does the byte enable functionality work on the IDT71016S12PHI8?

The IDT71016S12PHI8 uses active-low BHE (high byte enable) and BLE (low byte enable) to gate I/O8–I/O15 and I/O0–I/O7 independently. When BHE = L and BLE = H, only high-byte data appears on I/O8–I/O15; when BHE = H and BLE = L, only low-byte data appears on I/O0–I/O7. Both low enables full 16-bit access-matching Intel 80x86 bus protocols.

Is the IDT71016S12PHI8 still recommended for new designs?

No-the IDT71016S12PHI8 was marked "Not recommended for new designs" in August 2000, though that notice was removed in February 2001. It remains available for legacy support and obsolescence management, but Aetrix Electronics advises evaluating modern low-power alternatives for new projects requiring long-term supply assurance.