Renesas 7132SA100J

Overview

IDT7132SA100J 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 100 ns maximum read/write cycle time. It operates on a single 5V ±10% supply, supports industrial temperature range (–40°C to +85°C), and is packaged in a 48-pin PLCC. 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 IDT7132SA100J datasheet, IDT7132SA100J pinout, IDT7132SA100J application, or IDT7132SA100J equivalent, key selection considerations include its master-side BUSY arbitration timing (tBAA ≤ 100 ns), dual independent port access without external logic, 5V TTL compatibility, low-power standby current (ISB3 = 1.0 mA typ.), and support for battery-backed data retention only in LA variants - not applicable to this SA-grade part.

Technical Context

The IDT7132SA100J implements hardware-based port arbitration using address- and chip-enable–driven BUSY assertion, where tBAA (BUSY access time from address) and tBAC (from CE) are both guaranteed ≤100 ns. Its open-drain BUSYL/BUSYR outputs require 270 Ω pull-up resistors and serve exclusively as write-inhibit signals for slave devices in width-expanded configurations.

It features fully independent left/right ports with separate A0–A10, I/O0–I/O7, CE/OE/R/W control lines per side, enabling asynchronous concurrent read/write operations. The device enters low-power standby (ISB3 ≤ 1.0 mA) when both CE pins are high, and supports no-battery-retention operation - distinguishing it from LA variants.

Key Specifications

Pinout & Package

Package: 48-pin PLCC (PLG52), body size ≈ 0.75 in × 0.75 in × 0.17 in. Pin 1 index corner marked; all VCC pins must be connected to 5V supply, all GND pins to ground.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C136-100JC, IDT7132SA100J delivers integrated arbitration and true master capability, eliminating design risk from external timing-critical logic; versus IDT7142SA100J, it provides the essential BUSY generation and arbitration control needed to initiate and coordinate multi-device memory expansion.

Availability

IDT7132SA100J is available at Aetrix Electronics and suitable for real-time motion control, avionics data acquisition, and industrial PLC I/O mapping requiring stable component supply across extended product lifecycles.

Supply support for IDT7132SA100J 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, RF, and sensor solutions for communications, computing, and industrial markets.

IDT7132SA100J belongs to the IDT7132/7142 dual-port SRAM family, designed specifically for deterministic, low-latency memory sharing between heterogeneous processors, FPGAs, and ASICs in hard real-time systems.

FAQ

What is the function of BUSYL and BUSYR on the IDT7132SA100J?

BUSYL and BUSYR are open-drain outputs on the IDT7132SA100J that signal port contention when both ports attempt simultaneous access to the same memory location. They require 270 Ω pull-up resistors and are used to inhibit writes on IDT7142 SLAVE devices in width-expanded configurations. These pins are not inputs - unlike on IDT7142 - and do not affect internal write operations on the IDT7132SA100J itself.

Does the IDT7132SA100J support battery backup data retention?

No, the IDT7132SA100J does not support battery backup data retention. That feature is exclusive to LA-grade variants (e.g., IDT7132LA100J), which guarantee 2V data retention. The "SA" suffix denotes standard active power characteristics only, with no low-voltage retention capability. For battery-backed operation, IDT7132LA100J must be selected instead.

Can the IDT7132SA100J operate as a standalone dual-port RAM without IDT7142 slaves?

Yes, the IDT7132SA100J can operate as a standalone 8-bit dual-port SRAM with full functionality - independent left/right port access, on-chip arbitration, and BUSY signaling - without any IDT7142 devices. Its MASTER designation reflects capability, not dependency; the IDT7142 is optional and used only when expanding data bus width beyond 8 bits.

What package type is used for the IDT7132SA100J?

The IDT7132SA100J is supplied in a 48-pin plastic leaded chip carrier (PLCC), designated PLG52 in IDT documentation. Its body measures approximately 0.75 in × 0.75 in × 0.17 in. This package is distinct from DIP, LCC, and flatpack variants also offered in the 7132SA/LA family - the "J" suffix confirms the PLCC configuration.

How does the IDT7132SA100J handle simultaneous read/write to the same address?

The IDT7132SA100J uses hardware arbitration to resolve simultaneous accesses: the port whose address and CE signals stabilize first wins, while the other port asserts BUSYL or BUSYR to indicate contention. Writes on the losing side are internally gated - no data corruption occurs. The tAPS (arbitration priority setup) parameter of 5 ns ensures deterministic resolution without external intervention.