Renesas 7132SA25J8

Overview

IDT7132SA25J8 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 25 ns maximum read cycle time. It operates at 5V ±10%, supports industrial temperature range (–40°C to +85°C), and is packaged in a 48-pin flatpack for use in real-time embedded systems requiring concurrent memory access from two independent buses.

For engineers reviewing the IDT7132SA25J8 datasheet, IDT7132SA25J8 pinout, IDT7132SA25J8 application, or IDT7132SA25J8 equivalent, key selection criteria include BUSY arbitration timing (tBAA ≤ 25 ns), dual-port power-down control via CE, open-drain BUSY output requiring 270Ω pull-up, and compatibility with IDT7142 SLAVE devices for 16-bit+ width expansion.

Technical Context

The IDT7132SA25J8 implements hardware-based port arbitration using address and chip-enable inputs to assert BUSYL/BUSYR outputs within 25 ns, preventing simultaneous writes to identical addresses. Its dual independent ports feature separate A0–A10, I/O0–I/O7, R/W, OE, and CE controls per side, enabling fully asynchronous read/write operations without external logic.

As a MASTER-only device, it integrates arbitration logic and open-drain BUSY outputs (requiring external 270Ω pull-ups), while IDT7142 serves as SLAVE with BUSY inputs. The device uses CMOS technology, supports TTL-compatible signaling, and enters low-power standby (ISB3 ≤ 1.0 mA) when both CE pins are deasserted at CMOS levels.

Key Specifications

Pinout & Package

Package: 48-pin flatpack (FP48), hermetic ceramic, 0.75 in × 0.75 in × 0.11 in body size, index-marked top view.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C024AV-25AXC and IS61LV25616AL-25TQLI, the IDT7132SA25J8 uniquely delivers 5 V TTL-compatible dual-port operation with integrated hardware arbitration and industrial temperature support in a compact 48-pin flatpack - essential for legacy military and industrial control designs requiring guaranteed write coherency.

Availability

IDT7132SA25J8 is available at Aetrix Electronics and suitable for real-time digital signal processing, FPGA co-processor interfacing, military radar front-end buffering, industrial PLC motion control, and avionics data acquisition requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for IDT7132SA25J8 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, RF, and sensor solutions before its acquisition by Renesas Electronics in 2019.

The IDT7132SA25J8 belongs to IDT's legacy high-speed dual-port SRAM product line, engineered specifically for deterministic real-time systems where concurrent memory access and hardware-enforced write coherency are mandatory - such as radar, test equipment, and industrial automation.

FAQ

What is the function of the BUSY pins on the IDT7132SA25J8?

The BUSYL and BUSYR pins on the IDT7132SA25J8 are open-drain arbitration outputs that signal port contention when both ports attempt simultaneous access to the same memory address. They require external 270Ω pull-up resistors to VCC and are used to stall the lower-priority write operation. This hardware mechanism ensures deterministic resolution without software intervention - a core capability of the IDT7132SA25J8 as a MASTER device.

Can the IDT7132SA25J8 operate in battery backup mode?

No, the IDT7132SA25J8 cannot operate in battery backup mode. Only the LA variant (e.g., IDT7132LA25J8) supports 2V data retention. The "SA" suffix denotes standard active power consumption (325 mW typ), while "LA" indicates low-power design with battery backup capability. The IDT7132SA25J8 retains data only while powered by its nominal 5V supply.

Which packages are available for the IDT7132SA25J8?

Per the official IDT datasheet, the IDT7132SA25J8 is offered in 48-pin flatpack (FP48), 48-pin LCC (LC48), 48-pin DIP (PDG48/SB48), and 52-pin PLCC (PLG52) packages. The "J8" suffix specifically denotes the 48-pin flatpack configuration - a hermetic ceramic package with 0.75″ × 0.75″ footprint and 0.11″ height, optimized for high-reliability industrial and military applications.

How does the IDT7132SA25J8 differ from the IDT7142 series?

The IDT7132SA25J8 is a MASTER dual-port SRAM with on-chip arbitration logic and BUSY outputs, whereas IDT7142 devices are SLAVES with BUSY inputs and no arbitration circuitry. The IDT7132SA25J8 can operate stand-alone or coordinate with IDT7142 SLAVES to build 16-bit-or-wider memory systems. Critically, only the IDT7132SA25J8 asserts BUSY signals - IDT7142 uses them to inhibit writes, making the two functionally complementary, not interchangeable.

What is the minimum setup time required for arbitration priority on the IDT7132SA25J8?

The IDT7132SA25J8 requires a minimum arbitration priority setup time (tAPS) of 5 ns, as specified in Table 11a of the datasheet. This parameter ensures deterministic BUSY assertion when address and chip-enable signals stabilize relative to the opposing port. Meeting tAPS guarantees that the earlier-accessing port wins arbitration - failure to satisfy this timing may result in undefined BUSY behavior or data corruption, making it a critical constraint in high-speed synchronous system design using the IDT7132SA25J8.