Renesas 7132LA20J8

Overview

IDT7132LA20J8 from Integrated Device Technology (IDT) is a high-speed 2K × 8 dual-port static RAM configured as a MASTER device with on-chip arbitration logic, BUSY output flag, and battery-backed data retention at 2V. It supports independent asynchronous read/write access on left and right ports, operates at 5V ±10%, and delivers 20ns max read cycle time for real-time inter-processor communication in embedded control systems.

For engineers reviewing the IDT7132LA20J8 datasheet, IDT7132LA20J8 pinout, IDT7132LA20J8 application, or IDT7132LA20J8 equivalent, key selection considerations include its master arbitration capability, 2V data retention, open-drain BUSY outputs requiring 270Ω pull-up, industrial temperature range (–40°C to +85°C), and compatibility with 48-pin flatpack (J8) packaging.

Technical Context

The IDT7132LA20J8 implements hardware-based port arbitration using address and chip-enable inputs to assert BUSYL/BUSYR outputs-open-drain signals that stall conflicting writes when both ports access the same memory location. Its arbitration logic ignores R/W polarity and triggers based solely on timing alignment of CE and address transitions.

This device features two fully independent I/O buses (I/O_0L–I/O_7L and I/O_0R–I/O_7R), separate control sets (CEL/OEL/R/WL and CER/OER/R/WR), and dedicated 11-bit address buses (A_0L–A_10L, A_0R–A_10R). Power management includes TTL-compatible CE-controlled standby modes with ISB3 ≤ 0.2mA (full CMOS-level standby).

Key Specifications

Pinout & Package

Package: 48-pin flatpack (J8), body size ≈ 0.75 in × 0.75 in × 0.11 in, hermetically sealed for industrial reliability.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-port SRAM applications.

Compared with CY7C133-20JC and IDT7142LA20J8, the IDT7132LA20J8 uniquely integrates master arbitration, open-drain BUSY outputs, and 2V data retention-making it irreplaceable in applications requiring autonomous contention resolution and battery-backed state preservation.

Availability

IDT7132LA20J8 is available at Aetrix Electronics and suitable for industrial automation, aerospace avionics, and real-time embedded control systems requiring stable component supply, long-term lifecycle support, and MIL-PRF-38535-compliant reliability.

Supply support for IDT7132LA20J8 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) is a fabless semiconductor company specializing in timing, memory interface, RF, and power management solutions for communications, computing, and industrial markets.

The IDT7132/7142 family was designed specifically for high-reliability dual-processor architectures requiring deterministic memory access, hardware arbitration, and seamless width expansion-targeting military, industrial, and telecom infrastructure applications.

FAQ

What is the function of the BUSY pins on the IDT7132LA20J8?

The BUSYL and BUSYR pins on the IDT7132LA20J8 are open-drain arbitration outputs that go low when port contention occurs-i.e., when both left and right ports attempt simultaneous access to the same memory address. These signals must be pulled up with 270Ω resistors and are used to stall the contending port's write operation. The IDT7132LA20J8 is the only device in the 7132/7142 family with active BUSY outputs; SLAVE devices like IDT7142 use BUSY as an input.

Does the IDT7132LA20J8 support battery backup operation?

Yes, the IDT7132LA20J8 supports battery backup operation with guaranteed data retention at VCC = 2.0 V (per Table 6). This LA-series feature allows the device to retain stored data during main power loss without external refresh circuitry. The retention current is specified at ≤4000 µA (military/industrial) and ≤1500 µA (commercial), enabling long-duration backup with small coin-cell batteries.

What package type does the IDT7132LA20J8 use, and what are its mechanical dimensions?

The IDT7132LA20J8 uses a 48-pin flatpack (J8) package with body dimensions approximately 0.75 in × 0.75 in × 0.11 in. This hermetically sealed ceramic package meets MIL-PRF-38535 QML requirements for high-reliability applications and provides superior thermal and moisture resistance compared to plastic DIP or PLCC variants.

Can the IDT7132LA20J8 operate in standalone mode without a SLAVE device?

Yes, the IDT7132LA20J8 functions fully as a standalone 8-bit dual-port SRAM. Its on-chip arbitration logic, BUSY outputs, and independent left/right control buses allow autonomous operation. The SLAVE IDT7142 is optional and used only when expanding data bus width beyond 8 bits (e.g., 16-bit or wider systems), where the IDT7132LA20J8 serves as the MASTER arbitrator.

What is the maximum operating temperature range for the IDT7132LA20J8?

The IDT7132LA20J8 is rated for industrial temperature operation from –40°C to +85°C. This range is explicitly confirmed in the "Recommended Operating Temperature and Supply Voltage" table (page 4) and applies to the LA speed grade. It is not rated for commercial (0°C to +70°C) or military (–55°C to +125°C) grades unless specifically ordered with those suffixes.