Renesas 7132LA35C

Overview

IDT7132LA35C 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, features 35ns max read cycle time, 1mW typical standby power, and operates on single 5V ±10% supply. It is used in real-time embedded systems requiring concurrent memory access-e.g., digital signal processors interfacing with host controllers.

For engineers reviewing the IDT7132LA35C datasheet, IDT7132LA35C pinout, IDT7132LA35C application, or IDT7132LA35C equivalent, key selection considerations include its master-mode arbitration capability, open-drain BUSY outputs requiring 270Ω pull-up, industrial temperature range (–40°C to +85°C), and compatibility with IDT7142 slave devices for 16-bit+ bus expansion.

Technical Context

The IDT7132LA35C implements hardware-based port arbitration using address and chip enable signals-not R/W state-to assert BUSYL/BUSYR outputs when both ports access the same memory location. Its arbitration logic guarantees deterministic priority resolution via tAPS (5ns setup time), preventing simultaneous writes without external logic.

As a low-power (LA) variant, it supports 2V data retention mode with ICCDR ≤ 4mA (typical 100µA), enabling battery backup operation. All I/Os are TTL-compatible, and CE-controlled automatic power-down enables ISB3 ≤ 0.2mA (full standby, CMOS inputs).

Key Specifications

Pinout & Package

48-pin Flatpack (FP48) package: hermetically sealed ceramic body (0.75″ × 0.75″ × 0.11″), side-brazed leads, suitable for high-reliability military and industrial applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT7132LA35C, CY7C136-35JC requires external arbitration circuitry for multi-device systems, while IDT7142LA35C lacks master functionality entirely-making neither a drop-in replacement, but both viable for specific subsystem roles within dual-port memory architectures.

Availability

IDT7132LA35C is available at Aetrix Electronics and suitable for real-time DSP buffering, avionics data acquisition, and industrial motion control applications requiring stable component supply, long-term lifecycle support, and MIL-qualified reliability.

Supply support for IDT7132LA35C 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 fabless semiconductor company specializing in timing, memory interface, and RF solutions before its acquisition by Renesas in 2019; its dual-port SRAM portfolio remains widely deployed in mission-critical systems.

IDT7132LA35C belongs to the IDT7132/7142 family of high-speed dual-port SRAMs designed specifically for real-time embedded systems requiring deterministic, hardware-managed concurrent memory access without software overhead.

FAQ

What is the function of BUSYL and BUSYR on the IDT7132LA35C?

BUSYL and BUSYR are open-drain arbitration status outputs on the IDT7132LA35C. When asserted LOW, they indicate that the opposite port has accessed the same memory address, blocking writes on the contending side. Each requires a 270Ω pull-up resistor to 5V. These signals enable hardware-coordinated access without CPU intervention, and are essential for reliable master/slave expansion with IDT7142 devices.

Does the IDT7132LA35C support battery backup operation?

Yes, the IDT7132LA35C supports battery backup operation with data retention down to 2.0V (VDR), a feature exclusive to LA-grade parts. In retention mode, ICCDR is typically 100µA (max 4mA), allowing operation from small coin cells. This capability is not present in SA variants and requires CE and all inputs held at valid CMOS levels (≥ VCC − 0.2V or ≤ 0.2V) during backup.

Can the IDT7132LA35C operate as a standalone dual-port RAM without a slave device?

Yes, the IDT7132LA35C functions fully as a standalone 2K × 8 dual-port SRAM with independent left/right ports, arbitration, and BUSY signaling. Its "MASTER" designation reflects capability-not requirement-for expansion. It is commonly used alone in applications like dual-processor communication or real-time buffering where hardware arbitration adds value without needing width expansion.

What package types are available for the IDT7132LA35C?

The IDT7132LA35C is offered in 48-pin Flatpack (FP48), 48-pin LCC (LC48), 48-pin side-braze DIP (SB48), and 52-pin PLCC (PLG52). The FP48 variant-used in the IDT7132LA35C-is a hermetically sealed ceramic package with 0.75″ × 0.75″ footprint, rated for industrial temperature (–40°C to +85°C) and compliant with MIL-PRF-38535 QML for high-reliability applications.

How does the IDT7132LA35C handle simultaneous access to the same memory location?

The IDT7132LA35C uses on-chip arbitration logic to detect simultaneous access to identical addresses via CEL/CER and address lines. It asserts BUSYL or BUSYR LOW to stall the later-arriving write, ensuring only one port completes the operation. Priority is resolved deterministically by tAPS (5ns arbitration setup time), and the winning port proceeds without delay-guaranteeing data coherency without software locks or external logic.