Renesas 7132SA25J

Overview

7132SA25J 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), and 25 ns maximum read cycle time. It operates at 5V ±10%, supports independent asynchronous access on left/right ports, and enables 16-bit-or-wider memory expansion when paired with IDT7142 SLAVE devices in real-time embedded control systems.

For engineers reviewing the 7132SA25J datasheet, 7132SA25J pinout, 7132SA25J application, or 7132SA25J equivalent, key selection criteria include BUSY arbitration timing (tBAA ≤ 25 ns), dual-port power-down current (ISB3 ≤ 1.0 mA), open-drain BUSY drive capability (16 mA sink), and compatibility with 48-pin flatpack/LCC/DIP packages for space-constrained military and industrial PCB layouts.

Technical Context

The 7132SA25J implements hardware-based port arbitration using address and chip-enable inputs only-ignoring R/W polarity-to assert BUSYL/BUSYR outputs within 25 ns of valid address/CE assertion. Its open-drain BUSY pins require external 270 Ω pull-up resistors and directly inhibit writes on the contending port without software intervention.

It features separate CE, OE, and R/W controls per port, enabling full-speed concurrent read/write operations across independent address spaces. The device enters low-power standby (ISB3 = 1.0 mA typ.) when both CEs are high, and retains full functionality across –40°C to +85°C industrial temperature range with 5.0 V ±10% supply.

Key Specifications

Pinout & Package

7132SA25J is packaged in a 48-pin flatpack (FP48) with 0.75 in × 0.75 in footprint and 0.11 in height, compliant with MIL-PRF-38535 QML for military reliability. All VCC and GND pins must be externally connected per datasheet Note 1–2.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C133-25JC and IDT7142SA25J, the 7132SA25J uniquely delivers integrated arbitration and open-drain BUSY signaling in a single MASTER device, eliminating external logic while enabling scalable, deterministic dual-port memory architectures.

Availability

7132SA25J is available at Aetrix Electronics and suitable for real-time motion control, avionics data buffering, industrial PLC I/O mapping, and military radar signal processing requiring stable component supply across extended temperature and lifecycle requirements.

Supply support for 7132SA25J 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 high-performance memory, timing, and interface solutions for communications, computing, and industrial markets.

The IDT7132/7142 product line was engineered specifically for deterministic dual-port memory applications requiring hardware arbitration, low-latency BUSY signaling, and MIL-qualified reliability in embedded control systems.

FAQ

What is the function of the BUSY pins on the 7132SA25J?

The BUSYL and BUSYR pins on the 7132SA25J are open-drain outputs that signal port contention when both ports attempt simultaneous access to the same memory location. They require external 270 Ω pull-up resistors and assert low to internally inhibit writes on the contending port. This hardware arbitration eliminates race conditions without firmware intervention - a core differentiator of the 7132SA25J versus generic dual-port SRAMs.

Does the 7132SA25J support battery backup operation?

No, the 7132SA25J does not support battery backup. Battery retention (2V data hold) is exclusive to the LA variant (e.g., 7132LA25J). The "SA" suffix denotes standard active-power optimization, with typical active power of 325 mW and standby current of 5 mW - optimized for performance over low-voltage retention.

Can the 7132SA25J operate as a standalone dual-port RAM without a slave device?

Yes, the 7132SA25J functions fully as a standalone 2K × 8 dual-port SRAM with independent left/right address, control, and I/O buses. Its on-chip arbitration logic and BUSY outputs remain fully operational in standalone mode. The SLAVE (7142) pairing is optional and used only when expanding data bus width beyond 8 bits - it is not required for basic dual-port operation.

What package types are available for the 7132SA25J?

The 7132SA25J is offered in 48-pin flatpack (FP48), 48-pin LCC (LC48), and 48-pin DIP (PDG48/SB48) packages. The FP48 variant meets MIL-PRF-38535 QML requirements and is hermetically sealed for high-reliability military and aerospace use. All packages share identical pinout and electrical specifications.

How does the 7132SA25J handle simultaneous read/write operations to the same address?

When both ports access the same address concurrently, the 7132SA25J uses hardware arbitration based on address and chip-enable timing (tAPS = 5 ns setup) to determine priority. The winning port proceeds; the losing port asserts BUSYL or BUSYR low, which internally gates its write signal. Valid data from the winning port appears after tBDD (≤35 ns), ensuring deterministic resolution without data corruption - a guaranteed behavior unique to the 7132SA25J's MASTER architecture.