Renesas IDT71024S20YI

Overview

IDT71024S20YI from Renesas Electronics is a 128K × 8-bit (1 Mbit) high-speed CMOS static RAM with 20 ns access and cycle times, industrial temperature range (–40°C to +85°C), TTL-compatible I/O, and dual chip select plus output enable control. It operates from a single 5.0 V ±10% supply and is used in real-time data buffering for industrial controllers and legacy embedded systems requiring asynchronous, non-refreshed memory.

For engineers reviewing the IDT71024S20YI datasheet, IDT71024S20YI pinout, IDT71024S20YI application, or IDT71024S20YI equivalent, key selection criteria include guaranteed tAA ≤20 ns at industrial temperature, ISB1 standby current of 10 mA max, SOJ-32 package compatibility, and direct replacement feasibility in legacy 5V SRAM sockets.

Technical Context

The IDT71024S20YI implements fully static asynchronous architecture-no clocks or refresh cycles required-with bidirectional TTL-compatible I/O lines and independent chip select (CS1, CS2) and output enable (OE) controls. Its timing is defined by overlapping active-low CS1 and active-high CS2 for read/write enable, with WE-controlled write cycles and OE-gated output drivers.

It supports three power states: active (ICC = 140 mA max), TTL-level standby (ISB = 40 mA max), and full CMOS-level standby (ISB1 = 10 mA max), all validated across –40°C to +85°C. Input leakage |ILI| ≤5 µA and output leakage |ILO| ≤5 µA ensure stable bus hold during low-power modes.

Key Specifications

Pinout & Package

Package: 32-pin Plastic SOJ (Small Outline J-Lead), available in both 300-mil (PJG32) and 400-mil (PBG32) widths; IDT71024S20YI uses PJG32 per ordering code "TY".

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY62128EV30LL-45ZSXIT and AS6C1008-20PIN, the IDT71024S20YI uniquely delivers 20 ns performance at industrial temperature in a 5V SOJ-32 package-enabling true drop-in replacement in legacy 5V industrial systems without voltage or layout changes.

Availability

IDT71024S20YI is available at Aetrix Electronics and suitable for industrial PLC data buffering, legacy medical instrument memory upgrades, avionics maintenance terminals, and test equipment pattern memory requiring stable component supply across extended product lifecycles.

Supply support for IDT71024S20YI 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

Renesas Electronics Corporation is a global semiconductor leader delivering microcontrollers, analog, power, and memory solutions for automotive, industrial, and IoT applications.

The IDT71024S20YI belongs to Renesas' legacy high-speed parallel SRAM product line, designed specifically for backward-compatible memory upgrades in 5V industrial control and instrumentation systems requiring proven reliability and long-term availability.

FAQ

What is the operating temperature range specified for the IDT71024S20YI?

The IDT71024S20YI is rated for industrial temperature operation from –40°C to +85°C. This specification is guaranteed across all AC and DC parameters in the datasheet, including tAA ≤20 ns, ISB1 ≤10 mA, and VIH/VIL thresholds. The "I" suffix in the part number explicitly denotes industrial grade, and thermal validation covers full parametric performance across this range without derating.

Does the IDT71024S20YI require a refresh circuit or clock signal?

No, the IDT71024S20YI uses fully static CMOS architecture and requires no refresh cycles or clock input. All internal circuitry is asynchronous, enabling direct connection to microcontrollers, FPGAs, or discrete logic without timing controllers. This eliminates refresh overhead and simplifies PCB layout-critical for deterministic real-time systems where jitter or missed refreshes could cause data corruption.

What package type and pin count does the IDT71024S20YI use?

The IDT71024S20YI uses a 32-pin Plastic SOJ (Small Outline J-Lead) package with 300-mil body width (ordering code "TY", package code PJG32). Pinout matches industry-standard 128K×8 SRAM footprints, including address lines A0–A16, bidirectional I/O0–I/O7, dual chip selects (CS1, CS2), output enable (OE), write enable (WE), VCC, and GND-all verified in the official Renesas datasheet Figure "SOJ Top View".

How does the dual chip select (CS1/CS2) architecture of the IDT71024S20YI improve system design?

The IDT71024S20YI's CS1 (active-low) and CS2 (active-high) configuration enables precise hierarchical memory decoding without external logic gates. For example, CS1 can be tied to a high-order address decoder output while CS2 connects to a global enable signal-allowing selective activation across multiple SRAMs on a shared bus. This reduces gate count, improves signal integrity, and avoids timing skew introduced by discrete AND gates in dense memory arrays.

Is the IDT71024S20YI RoHS-compliant and lead-free?

Yes, the IDT71024S20YI is a green, RoHS-compliant device. Per Renesas' ordering information, the "G" suffix indicates compliance with Restriction of Hazardous Substances directives, and the part is manufactured using lead-free terminations and halogen-free molding compounds. This is confirmed in the "Ordering Information" section of the March 2021 datasheet revision, which lists IDT71024S20TYG and IDT71024S20TYGI as green variants.