Renesas 7132SA35CB

Overview

IDT7132SA35CB 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 35 ns maximum read cycle time. It operates at 5V ±10%, supports independent asynchronous access on left/right ports, and is used in real-time data buffering for industrial motion controllers requiring deterministic port contention resolution.

For engineers reviewing the IDT7132SA35CB datasheet, IDT7132SA35CB pinout, IDT7132SA35CB application, or IDT7132SA35CB equivalent, key selection criteria include its 35 ns tRC timing, open-drain BUSY outputs requiring 270 Ω pull-up, TTL-compatible I/O, 48-pin flatpack package, and master-only arbitration capability - critical for width-expanded memory systems without external logic.

Technical Context

The IDT7132SA35CB implements hardware-based port arbitration using address and chip-enable inputs to assert BUSYL/BUSYR outputs when simultaneous accesses to identical addresses occur. Its arbitration logic ignores R/W polarity and triggers BUSY before write pulse initiation, enforcing strict timing constraints (tAPS = 5 ns minimum) to prevent data corruption in master/slave configurations.

This device features two fully independent ports with separate control (CEL/CER, OEL/OER, R/WL/R/WR), address (A0L–A10L / A0R–A10R), and bidirectional I/O (I/O0L–I/O7L / I/O0R–I/O7R) sets. The BUSY outputs are open-drain and require external 270 Ω pull-up resistors per datasheet Figure 3; no internal pull-ups are provided.

Key Specifications

Pinout & Package

Package: 48-lead flatpack (FP48), body dimensions ≈ 0.75 in × 0.75 in × 0.11 in. Pin 1 index corner marked; all VCC and GND pins must be connected per datasheet Notes 1–2.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT7132SA35CB, CY7C024AV-35AXC offers double data width but lacks integrated arbitration, increasing BOM count and layout area; IDT7134SA35CB extends capacity while preserving pin-compatible arbitration and timing behavior for seamless scalability.

Availability

IDT7132SA35CB is available at Aetrix Electronics and suitable for industrial motion control, avionics sensor fusion, redundant PLC I/O, and dual-processor shared memory systems requiring stable component supply, long-term lifecycle support, and MIL-PRF-38535-compliant manufacturing traceability.

Supply support for IDT7132SA35CB 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, and RF solutions before its acquisition by Renesas Electronics in 2019. IDT's dual-port SRAMs were engineered for deterministic real-time systems.

IDT7132SA35CB belongs to the IDT7132/7142 family designed specifically for width-expansible memory architectures in industrial automation and military-grade embedded systems where hardware arbitration eliminates software overhead and timing uncertainty.

FAQ

What is the function of BUSYL and BUSYR on the IDT7132SA35CB?

BUSYL and BUSYR are open-drain arbitration status outputs on the IDT7132SA35CB. When asserted low, they indicate that a port access to a contested memory address has been blocked. Each requires a 270 Ω pull-up resistor to VCC per datasheet Figure 3. These signals enable hardware-enforced serialization of concurrent reads/writes without external logic.

Can IDT7132SA35CB operate in battery backup mode?

No. Battery backup operation with 2V data retention is exclusive to LA variants (e.g., IDT7132LA35CB). The IDT7132SA35CB is an SA-series part optimized for speed and standard 5V operation; it does not support sub-4.5V retention voltage and lacks the low-leakage design of LA versions.

Is IDT7132SA35CB pin-compatible with IDT7142SA35CB?

No. IDT7132SA35CB is a MASTER device with BUSY outputs, while IDT7142SA35CB is a SLAVE with BUSY inputs. Their pin functions differ significantly: BUSYL/BUSYR are outputs on IDT7132SA35CB but inputs on IDT7142SA35CB, and arbitration logic exists only in the MASTER. They are complementary, not interchangeable.

What package type is used for IDT7132SA35CB?

IDT7132SA35CB uses a 48-lead flatpack (FP48) package with dimensions approximately 0.75 in × 0.75 in × 0.11 in. This hermetically sealed package meets MIL-PRF-38535 QML requirements for military and industrial applications, and differs from DIP, LCC, or PLCC variants in thermal and mechanical performance.

How does the IDT7132SA35CB handle simultaneous accesses to the same memory location?

IDT7132SA35CB uses on-chip arbitration logic to detect address matches between ports. When contention occurs, it asserts BUSYL or BUSYR low to stall the later-arriving access. The winning port proceeds; the losing port's write is internally gated. Timing parameters like tAPS (5 ns min.) ensure deterministic resolution without data corruption.