Renesas 7132LA35CB

Overview

IDT7132LA35CB 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 battery-backed data retention at 2V. It supports independent asynchronous read/write access on left and right ports, features 35ns max read cycle time, 1mW typical standby power, and operates on a single 5V ±10% supply. It is used in real-time embedded systems requiring concurrent memory access, such as digital signal processors interfacing with host controllers.

For engineers reviewing the IDT7132LA35CB datasheet, IDT7132LA35CB pinout, IDT7132LA35CB application, or IDT7132LA35CB equivalent, key selection considerations include its master arbitration capability, open-drain BUSY outputs requiring 270Ω pull-up resistors, industrial temperature range (–40°C to +85°C), 48-pin flatpack package, and compatibility with IDT7142 slave devices for 16-bit+ width expansion.

Technical Context

The IDT7132LA35CB 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, requiring tAPS ≥5ns setup to ensure deterministic priority resolution.

This device integrates two fully independent TTL-compatible ports-each with dedicated A0–A10, I/O0–I/O7, CE/OE/R/W, and BUSY signals-enabling full-speed concurrent access without external logic. The LA variant adds 2V data retention mode with ICCDR ≤4mA and tCDR = 0ns, enabling nonvolatile operation during main power loss.

Key Specifications

Pinout & Package

Package: 48-lead flatpack (FP48), body size ≈ 0.75 in × 0.75 in × 0.11 in, hermetically sealed, suitable for high-reliability industrial applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C133-35JC, IDT7132LA35CB delivers autonomous hardware arbitration and battery retention, reducing firmware complexity and enabling fail-safe operation; versus IDT7142LA35CB, it provides full MASTER functionality essential for standalone dual-port use cases.

Availability

IDT7132LA35CB is available at Aetrix Electronics and suitable for digital signal processing buffers, real-time industrial controllers, and avionics data loggers requiring stable component supply, long-term obsolescence support, and guaranteed industrial temperature performance.

Supply support for IDT7132LA35CB 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 pioneered high-performance dual-port SRAM architectures for real-time systems.

IDT7132LA35CB belongs to the IDT7132/7142 family of dual-port SRAMs designed specifically for applications demanding concurrent, deterministic memory access - including telecom infrastructure, test equipment, and safety-critical embedded control.

FAQ

What is the primary functional distinction between IDT7132LA35CB and IDT7142LA35CB?

IDT7132LA35CB is a MASTER dual-port SRAM with on-chip arbitration logic and open-drain BUSY outputs, enabling autonomous contention resolution. IDT7142LA35CB is a SLAVE device with BUSY inputs only and no arbitration circuitry - it must be paired with an IDT7132LA35CB to form a width-expanded memory system. The IDT7132LA35CB can operate independently; the IDT7142LA35CB cannot.

Does IDT7132LA35CB require external pull-up resistors on BUSY pins, and what value is specified?

Yes, IDT7132LA35CB's BUSYL and BUSYR pins are open-drain outputs and require external pull-up resistors to VCC. The datasheet specifies a 270Ω resistor for proper logic-level definition and timing compliance, especially critical in master/slave arrays where BUSY signals are wired-OR'd.

What is the minimum supply voltage required to maintain data retention in IDT7132LA35CB?

IDT7132LA35CB guarantees data retention at VCC = 2.0V, as confirmed in the Data Retention Characteristics table. Below 2.0V, leakage behavior is undefined and retention is not assured. This 2V capability enables reliable battery backup operation during main power failure.

Can IDT7132LA35CB operate across the full industrial temperature range of –40°C to +85°C at 35ns speed?

Yes, IDT7132LA35CB is explicitly rated for industrial temperature operation (–40°C to +85°C) at the 35ns speed grade, as stated in the "Features" section and confirmed in the "Recommended Operating Temperature" table. No derating or speed reduction is required within this range.

How does the arbitration priority setup time (tAPS) affect system timing design with IDT7132LA35CB?

IDT7132LA35CB requires tAPS ≥5ns - the earlier port's address and CE must stabilize at least 5ns before the later port's corresponding signals to ensure deterministic BUSY assertion. Failure to meet tAPS may result in unpredictable BUSY assignment, risking data corruption during simultaneous accesses to identical addresses.