Renesas 7132SA55J8

Overview

7132SA55J8 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), 55 ns maximum read/write cycle time, TTL-compatible 5 V ±10% supply, and industrial temperature range (–40°C to +85°C). It enables error-free 16-bit-or-wider memory expansion when paired with IDT7142 SLAVE devices in real-time embedded control systems.

For engineers reviewing the 7132SA55J8 datasheet, 7132SA55J8 pinout, 7132SA55J8 application, or 7132SA55J8 equivalent, key selection considerations include BUSY arbitration timing (tBAA ≤ 30 ns), dual-port asynchronous access capability, low-power standby current (ISB3 = 0.2 mA typ.), and compatibility with 48-pin flatpack (FP48) packaging for space-constrained industrial PCB layouts.

Technical Context

The 7132SA55J8 implements independent left/right port control with separate address (A0L–A10L, A0R–A10R), data (I/O0L–I/O7L, I/O0R–I/O7R), and control lines (CEL/CER, OEL/OER, R/WL/R/WR, BUSYL/BUSYR). Its on-chip arbitration logic resolves port contention by asserting BUSY outputs based on chip enable and address match timing - not R/W state - ensuring deterministic priority resolution without external logic.

As a MASTER-only device, it features open-drain BUSY outputs requiring 270 Ω pull-up resistors, supports battery backup data retention only in LA variants (not applicable here), and operates exclusively in active/standby power modes controlled by CE signals - no sleep or deep-power-down states beyond ISB1–ISB4 defined in DC specs.

Key Specifications

Pinout & Package

48-pin flatpack (FP48) package with 0.050″ lead pitch, body dimensions 0.75 in × 0.75 in × 0.11 in, and index mark at Pin 1. All VCC pins require direct connection to 5 V supply; all GND pins must be tied to system ground.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C133-55JC and IDT7142SA55J8, the 7132SA55J8 uniquely integrates arbitration logic and open-drain BUSY outputs, enabling self-contained MASTER functionality in width-expanded memory systems without external components or layout changes.

Availability

7132SA55J8 is available at Aetrix Electronics and suitable for motor control buffers, PLC I/O mapping tables, digital signal processor interfaces, and redundant safety controllers requiring stable component supply across extended product lifecycles.

Supply support for 7132SA55J8 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 since 2019.

The IDT7132 family was designed specifically for deterministic dual-port memory applications in industrial automation and real-time control systems, emphasizing hardware arbitration, low-latency access, and robust packaging for harsh environments.

FAQ

What is the function of BUSYL and BUSYR on the 7132SA55J8?

BUSYL and BUSYR are open-drain output flags on the 7132SA55J8 indicating port contention when both ports access the same memory address. They require 270 Ω pull-up resistors to VCC and are asserted low to stall the contending port's write operation. The 7132SA55J8 uses these signals for hardware-based arbitration without external logic.

Can the 7132SA55J8 operate with a 3.3 V supply?

No. The 7132SA55J8 is strictly a 5 V ±10% device (4.5–5.5 V) and is TTL-compatible. It does not support 3.3 V operation, and applying 3.3 V to VCC will result in undefined behavior or failure to meet AC timing specifications such as tAA ≤ 55 ns.

Is the 7132SA55J8 pin-compatible with the IDT7142SA55J8?

Yes, the 7132SA55J8 and IDT7142SA55J8 share identical FP48 pinouts and AC/DC electrical characteristics, but differ functionally: 7132SA55J8 is MASTER (BUSY outputs, arbitration logic), while IDT7142SA55J8 is SLAVE (BUSY inputs, no arbitration). They are complementary - not interchangeable.

Does the 7132SA55J8 support battery backup data retention?

No. Battery backup data retention (down to 2 V) is exclusive to LA variants like 7132LA55J8. The 7132SA55J8 is the standard-power version and loses data when VCC drops below 4.5 V - it has no guaranteed retention mode.

What is the maximum operating frequency implied by the 55 ns specification of the 7132SA55J8?

The 55 ns specification refers to tRC (read cycle time), implying a maximum sustained throughput of approximately 18.2 million operations per second (1 / 55 ns). This is not a clock frequency - the 7132SA55J8 is an asynchronous SRAM with no internal clock; timing is governed by external control signal edges and setup/hold requirements.