Renesas IDT71016S12PH

Overview

IDT71016S12PH 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 dual byte enable (BHE/BLE) for 8-bit subsystem interfacing - used in legacy industrial controllers and embedded memory buffers requiring deterministic asynchronous timing.

For engineers reviewing the IDT71016S12PH datasheet, IDT71016S12PH pinout, IDT71016S12PH application, or IDT71016S12PH equivalent, key selection criteria include its 12 ns commercial-grade access time, 44-pin plastic SOJ package, bidirectional TTL-compatible I/O, and support for word/byte read-write operations without clocks or refresh.

Technical Context

The IDT71016S12PH implements fully static asynchronous circuitry with no clock or refresh required. Its architecture includes independent address decoding for 64K words, separate high- and low-byte I/O buffers controlled by BHE and BLE, and TTL-compatible input thresholds (VIH ≥ 2.2 V, VIL ≤ 0.8 V) ensuring direct interface with 5 V logic families.

Timing is governed by three independent control paths: chip-select–driven (tACS = 12 ns), output-enable–driven (tOE = 7 ns), and address-driven (tAA = 12 ns). All timing parameters are guaranteed over 0°C to +70°C at VCC = 5.0 V ±10%, with standby current as low as 10 mA in CMOS-level deselected mode (ISB1).

Key Specifications

Pinout & Package

44-pin Plastic SOJ (SO44-1) package per JEDEC MS-025, 400-mil body width, gull-wing leads, lead-free compatible (per datasheet revision Feb 2001).

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT71016S12PH, CY62167EV30LL-45ZXC offers higher density but introduces voltage translation and timing degradation, while AS6C1008-12PIN sacrifices bus width and byte-enable flexibility - neither provides functional or mechanical equivalence for legacy 44-pin 16-bit SRAM sockets.

Availability

IDT71016S12PH is available at Aetrix Electronics and suitable for industrial PLCs, legacy x86 BIOS modules, and avionics display subsystems requiring stable component supply and long-lifecycle obsolescence management.

Supply support for IDT71016S12PH 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-performance CMOS SRAM architectures in the 1990s.

IDT71016S12PH belongs to IDT's flagship 71000-series asynchronous SRAM family, designed specifically for deterministic, low-latency memory expansion in 5 V microprocessor and controller systems of the late 1990s.

FAQ

What is the maximum operating frequency supported by the IDT71016S12PH?

The IDT71016S12PH does not operate on a clock signal - it is an asynchronous static RAM. Its performance is defined by timing parameters such as tRC (12 ns read cycle time) and tAA (12 ns address access time), enabling reliable operation in systems with bus frequencies up to ~83 MHz when interfaced with appropriate control logic. The IDT71016S12PH requires no clock input and functions deterministically on address and control edge transitions.

Does the IDT71016S12PH support byte-wide writes without affecting the opposite byte?

Yes. The IDT71016S12PH supports independent byte writes via dedicated BHE (high-byte enable) and BLE (low-byte enable) inputs. Asserting only BLE places I/O0–I/O7 in write mode while holding I/O8–I/O15 in high-impedance - preserving the upper byte. This functionality is verified in the truth table and timing diagrams of the official datasheet for IDT71016S12PH.

Is the IDT71016S12PH RoHS-compliant?

The IDT71016S12PH was manufactured prior to RoHS enforcement (pre-2006) and is not RoHS-compliant. Its plastic SOJ package contains leaded solder terminations, consistent with JEDEC MS-025 standards of the era. For RoHS-compliant alternatives, consult Aetrix Electronics' qualified replacements list referencing IDT71016S12PH form-factor constraints.

Can the IDT71016S12PH be used with a 3.3 V microcontroller interface?

No. The IDT71016S12PH requires a 5.0 V ±10% supply and features TTL-compatible I/O thresholds (VIH ≥ 2.2 V, VIL ≤ 0.8 V), making it incompatible with native 3.3 V logic without level translation. Direct connection risks undervoltage I/O recognition and potential bus contention. Interface to 3.3 V systems requires discrete level shifters or bus buffers rated for bidirectional 5 V ↔ 3.3 V translation.

What is the meaning of "S12" and "PH" in the IDT71016S12PH part number?

In IDT71016S12PH, "S12" denotes the 12 ns access speed grade (tAA), and "PH" specifies the 44-pin plastic SOJ package (SO44-1) per IDT's ordering convention. The "S" prefix indicates commercial temperature range (0°C to +70°C), and "PH" distinguishes it from the TSOP variant ("PI"). This coding is documented in the Ordering Information section of the IDT71016S12PH datasheet.