Renesas 7132LA25JGI8

Overview

7132LA25JGI8 from IDT is a high-speed 2K × 8 dual-port static RAM configured as a MASTER device with on-chip arbitration logic, BUSY output flag (open-drain), 25 ns maximum read cycle time, 2 V data retention capability, and industrial temperature range (–40°C to +85°C). It enables full-speed 16-bit-or-more memory expansion when paired with IDT7142 SLAVE devices in real-time embedded control systems.

For engineers reviewing the 7132LA25JGI8 datasheet, 7132LA25JGI8 pinout, 7132LA25JGI8 application, or 7132LA25JGI8 equivalent, this part supports deterministic port arbitration, battery-backed data retention, TTL-compatible 5V operation, and synchronous width-expansion without external logic - critical for avionics data buffers, industrial PLC memory co-processors, and dual-CPU inter-processor communication.

Technical Context

The 7132LA25JGI8 implements independent left/right ports with separate address, control, and I/O buses, enabling true asynchronous concurrent access. Its arbitration logic evaluates chip enable (CEL/CER) and address match timing to assert BUSYL/BUSYR outputs within 20 ns, preventing simultaneous writes to identical addresses.

As a low-power LA variant, it draws only 1 mA typical standby current (ISB3) at full CMOS-level disable and retains data at 2 V supply - achieved via optimized CMOS design with integrated power-down circuitry controlled solely by CE inputs per port.

Key Specifications

Pinout & Package

7132LA25JGI8 is packaged in a 48-pin ceramic LCC (LC48) with leadless construction, 0.600-inch body size, and surface-mount compatibility for high-reliability industrial PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C133-25JC, 7132LA25JGI8 delivers hardware arbitration and BUSY signaling in a single package, reducing BOM count and timing uncertainty; versus IDT7142LA25JGI8, it provides the essential MASTER logic needed to initiate and coordinate width expansion - making it irreplaceable in asymmetric dual-port topologies.

Availability

7132LA25JGI8 is available at Aetrix Electronics and suitable for avionics data buffering, industrial PLC memory co-processing, and dual-CPU inter-processor communication requiring stable component supply, long-term lifecycle support, and industrial temperature qualification.

Supply support for 7132LA25JGI8 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

IDT (Integrated Device Technology) is a fabless semiconductor company specializing in timing, memory interface, and RF solutions, now part of Renesas Electronics.

The IDT7132/7142 product line was designed specifically for deterministic dual-processor memory sharing in real-time embedded systems, emphasizing hardware arbitration, low-power retention, and seamless width scalability.

FAQ

What is the function of BUSYL and BUSYR on the 7132LA25JGI8?

BUSYL and BUSYR are open-drain arbitration outputs on the 7132LA25JGI8 that signal port contention when both left and right ports attempt simultaneous access to the same memory location. They require external 270 Ω pull-up resistors to VCC and drive LOW to inhibit writes on the contending port. This hardware mechanism ensures deterministic resolution without software intervention - a core feature distinguishing the 7132LA25JGI8 from standard SRAMs.

Does the 7132LA25JGI8 support battery backup operation?

Yes, the 7132LA25JGI8 supports battery backup operation with guaranteed data retention at 2.0 V minimum supply voltage. In retention mode (CE pins disabled, VCC = 2 V), it draws ≤4 µA typical current (ISB3), preserving all 2K × 8 memory contents during main power loss. This capability is exclusive to LA variants and is verified per datasheet Table 6.

Can the 7132LA25JGI8 operate as a standalone dual-port RAM without a SLAVE device?

Yes, the 7132LA25JGI8 functions fully as a standalone 8-bit dual-port SRAM with independent left/right access, arbitration, and BUSY signaling. Its MASTER capability is optional - used only when expanding data width beyond 8 bits using IDT7142 SLAVE devices. Standalone operation requires no external components beyond standard decoupling capacitors and BUSY pull-ups.

What is the meaning of "JGI8" in the part number 7132LA25JGI8?

The suffix "JGI8" in 7132LA25JGI8 denotes a 48-pin ceramic LCC (Leaded Chip Carrier) package, industrial temperature grade (–40°C to +85°C), and tape-and-reel packaging format. "J" = ceramic LCC, "G" = industrial temp, "I" = Pb-free finish, "8" = tape-and-reel - consistent with IDT's standard ordering nomenclature documented in the datasheet's Ordering Information section.

How does the 7132LA25JGI8 handle simultaneous read and write to the same address?

When both ports access the same address concurrently, the 7132LA25JGI8 uses on-chip arbitration logic to grant access to the port whose address and CE signals stabilize first (tAPS = 5 ns setup). The contending port receives BUSYL or BUSYR asserted LOW, which internally gates its write signal - preventing corruption. Valid data appears on the winning port after tBDD (25 ns max), while the losing port's write is suppressed entirely.