Renesas IDT71016S20PHI8

Overview

IDT71016S20PHI8 from Integrated Device Technology is a 64K × 16-bit (1 Mbit) high-speed CMOS static RAM with 20 ns read/write cycle time, TTL-compatible I/O, and dual byte enable (BHE/BLE) for 8-bit sub-word access. It operates from a single 5.0 V ±10% supply, supports industrial temperature range (–40°C to +85°C), and is used in real-time control buffers, legacy industrial PLCs, and embedded system boot memory where asynchronous, no-refresh operation is required.

For engineers reviewing the IDT71016S20PHI8 datasheet, IDT71016S20PHI8 pinout, IDT71016S20PHI8 application, or IDT71016S20PHI8 equivalent, key selection criteria include verified 20 ns tRC/tWC timing, SOJ-44 package compatibility, industrial-grade standby current (ISB = 45 mA), and byte-selectable I/O architecture for 8-bit microprocessor bus interfacing.

Technical Context

The IDT71016S20PHI8 implements fully static asynchronous logic with no clocks or refresh cycles, relying on address-stable read/write timing governed by tAA (20 ns max), tRC (20 ns max), and tWP (12 ns min). Its dual-byte enable architecture allows independent access to high (I/O8–I/O15) and low (I/O0–I/O7) data bytes under separate BHE/BLE control.

Input and output signals are TTL-compatible (VIH ≥ 2.2 V, VOL ≤ 0.4 V @ 8 mA), with bidirectional I/O buffers supporting high-impedance tri-state during deselect (CS = VIH) or OE = VIH. Standby power is minimized via CMOS-level chip disable (ISB1 = 10 mA at f = 0).

Key Specifications

Pinout & Package

Package: 44-pin Plastic SOJ (SO44-1), JEDEC standard, 400-mil body width, gull-wing leads, 0.050″ pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY62167EV30LL-20ZSXI and AS6C1008-20ZIN, the IDT71016S20PHI8 uniquely delivers industrial-grade 5 V operation with true dual-byte enable in SOJ-44 - critical for maintaining legacy 8-bit peripheral compatibility without bus contention or voltage translation.

Availability

IDT71016S20PHI8 is available at Aetrix Electronics and suitable for industrial PLC data buffers, legacy microprocessor boot memory, and communications protocol stack buffers requiring stable component supply across extended product lifecycles.

Supply support for IDT71016S20PHI8 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), founded in 1980 and acquired by Renesas in 2019, specialized in high-performance timing, memory, and interface ICs for computing and communications infrastructure.

The IDT71016S20PHI8 belongs to IDT's legacy high-speed CMOS SRAM product line, designed specifically for deterministic, no-refresh memory in industrial control, test equipment, and embedded systems requiring 5 V TTL compatibility and industrial temperature resilience.

FAQ

What is the operating voltage range for the IDT71016S20PHI8?

The IDT71016S20PHI8 operates from a single 5.0 V supply with a specified range of 4.5 V to 5.5 V (±10%). This ensures compatibility with standard 5 V TTL and CMOS logic families without external regulation or level shifting. All DC and AC parameters-including tRC, ICC, and VOL-are guaranteed across this voltage range at industrial temperatures. The IDT71016S20PHI8 does not support 3.3 V operation.

Does the IDT71016S20PHI8 require a clock or refresh signal?

No, the IDT71016S20PHI8 uses fully static CMOS circuitry and requires no clock, refresh cycles, or periodic access to retain data. Data remains valid indefinitely as long as VCC is maintained within specification and ambient temperature stays within the industrial range (–40°C to +85°C). This eliminates timing overhead and makes the IDT71016S20PHI8 ideal for deterministic real-time systems.

What is the function of BHE and BLE pins on the IDT71016S20PHI8?

BHE (High Byte Enable) and BLE (Low Byte Enable) are active-low inputs that independently control access to the upper (I/O8–I/O15) and lower (I/O0–I/O7) data bytes. When only BHE is asserted, only the high byte is read/written; when only BLE is asserted, only the low byte is accessed. This enables efficient 8-bit operations on a 16-bit bus, reducing bus traffic and power consumption in mixed-width architectures using the IDT71016S20PHI8.

Is the IDT71016S20PHI8 pin-compatible with other speed grades in the same family?

Yes, all IDT71016 speed variants-including IDT71016S12PHI8, IDT71016S15PHI8, and IDT71016S20PHI8-share identical pinout, package (SOJ-44), and functional logic. The only difference is guaranteed AC timing: tRC/tAA values are 12 ns, 15 ns, or 20 ns respectively. A board designed for IDT71016S20PHI8 can accept faster grades without layout changes, though timing margins must be re-verified for the target system clock.

What package type is used for the IDT71016S20PHI8?

The IDT71016S20PHI8 is packaged in a 44-pin Plastic SOJ (Small Outline J-lead), JEDEC standard SO44-1, with 400-mil body width and 0.050″ lead pitch. This surface-mount package features gull-wing leads and is distinct from TSOP variants (e.g., IDT71016S20PHI8's sibling IDT71016S20PGI8 uses SO44-2). The SOJ package provides robust mechanical retention in vibration-prone industrial environments.