Renesas 7132LA70JI8

Overview

IDT7132LA70JI8 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 operates at 70 ns max access time, supports independent asynchronous read/write on left/right ports, and targets real-time interprocessor communication and video frame buffering in industrial embedded systems.

For engineers reviewing the IDT7132LA70JI8 datasheet, IDT7132LA70JI8 pinout, IDT7132LA70JI8 application, or IDT7132LA70JI8 equivalent, key selection considerations include its 48-pin flatpack package, TTL-compatible 5V ±10% supply, 1 µA full-standby current (ISB3), and master-specific BUSY arbitration timing - critical for deterministic contention resolution in dual-CPU architectures.

Technical Context

The IDT7132LA70JI8 implements hardware-based port arbitration using address and chip-enable inputs to assert BUSYL/BUSYR outputs within 70 ns (tBAA/tBAC), enabling deterministic resolution of simultaneous accesses to identical memory locations. Its open-drain BUSY outputs require 270 Ω pull-up resistors and drive write-inhibit logic on slave devices like IDT7142.

It features separate control, address (A0–A10), and bidirectional I/O (I/O0L–I/O7L / I/O0R–I/O7R) for each port, with CE-driven automatic power-down into ISB3 mode (≤1 µA) when both ports are deselected. The LA variant guarantees 2V data retention during battery backup operation - a capability absent in SA versions.

Key Specifications

Pinout & Package

Package: 48-pin flatpack (FP48), body dimensions 0.75 in × 0.75 in × 0.11 in, hermetic ceramic construction rated for industrial temperature range (−40°C to +85°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT7132LA70JI8, CY7C136-70JC reduces component count only if software coordination replaces hardware arbitration, while IS61LV25616AL-70TQLI trades 5V compatibility and BUSY logic for higher density and lower voltage - neither offers drop-in replacement capability due to architectural and electrical mismatches.

Availability

IDT7132LA70JI8 is available at Aetrix Electronics and suitable for industrial PLCs, avionics sensor fusion modules, and real-time interprocessor communication systems requiring stable component supply, long-term lifecycle support, and MIL-PRF-38535-compliant manufacturing traceability.

Supply support for IDT7132LA70JI8 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, and RF solutions, acquired by Renesas Electronics in 2019.

IDT7132LA70JI8 belongs to the IDT7132/7142 dual-port SRAM family, designed specifically for deterministic, low-latency memory sharing between heterogeneous processors in industrial, military, and communications infrastructure.

FAQ

What is the maximum operating temperature range for IDT7132LA70JI8?

IDT7132LA70JI8 is rated for industrial temperature operation from −40°C to +85°C, validated across all electrical parameters including 70 ns access time, 1 µA ISB3 standby current, and 2V data retention. This range is explicitly specified in the "Recommended Operating Temperature" table and applies to the FP48 flatpack package used in this variant.

Does IDT7132LA70JI8 support true dual-port concurrent read/write operations?

Yes, IDT7132LA70JI8 supports fully independent asynchronous read and write operations on left and right ports simultaneously. Each port has dedicated control (CEL/CER, OEL/OER, R/WL/R/WR), address (A0L–A10L / A0R–A10R), and data (I/O0L–I/O7L / I/O0R–I/O7R) lines, enabling concurrent access to any memory location - subject to BUSY arbitration when addresses match.

How does the BUSY arbitration logic function in IDT7132LA70JI8?

In IDT7132LA70JI8, BUSY arbitration activates when both ports attempt access to identical addresses. The on-chip logic asserts BUSYL or BUSYR (open-drain) within 70 ns (tBAA) based on which port's address and CE signals stabilize first. This signal stalls the later port's write cycle, ensuring deterministic resolution without external logic - a feature exclusive to the MASTER IDT7132 variant.

What is the purpose of the 270 Ω pull-up resistor specified for BUSY pins on IDT7132LA70JI8?

The 270 Ω pull-up resistor is required because BUSYL and BUSYR on IDT7132LA70JI8 are open-drain outputs. Without it, the BUSY signal cannot drive a valid HIGH level to indicate "not busy." The value ensures fast rise time (<10 ns) under capacitive load while limiting current to <20 mA, complying with absolute maximum ratings and enabling reliable wired-OR expansion with multiple masters.

Can IDT7132LA70JI8 retain data during main power loss?

Yes, IDT7132LA70JI8 supports battery backup data retention at VCC = 2.0 V (VDR), drawing ≤4 mA (ICCDR) in retention mode. This allows continuous data hold during AC power interruption or system shutdown, provided a 2V backup source (e.g., lithium coin cell) is connected - a capability confirmed in the "Data Retention Characteristics" section and exclusive to LA-grade parts.