Renesas 7132LA100L48B

Overview

IDT7132LA100L48B 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, 100 ns maximum read/write cycle time, 1 mW typical standby power, and battery-backed data retention at 2 V. It enables full-speed, error-free 16-bit-or-wider memory expansion when paired with IDT7142 SLAVE devices in real-time industrial control and military avionics systems.

For engineers reviewing the IDT7132LA100L48B datasheet, IDT7132LA100L48B pinout, IDT7132LA100L48B application, or IDT7132LA100L48B equivalent, key selection criteria include BUSY arbitration timing (tBDD ≤ 65 ns), dual-port independent access capability, 48-pin flatpack package compatibility, and 2 V data retention support - all critical for deterministic memory coherency in safety-critical embedded systems.

Technical Context

The IDT7132LA100L48B implements hardware-based port arbitration using dedicated BUSYL and BUSYR open-drain outputs that assert during address contention, with tAPS = 5 ns priority setup time ensuring deterministic resolution. Its CMOS architecture supports asynchronous, independent read/write operations on left and right ports without external logic.

As a MASTER-only device, it integrates arbitration logic and BUSY flag generation (not present in SLAVE IDT7142), while supporting TTL-compatible 5 V ±10% operation, industrial temperature range (–40°C to +85°C), and automatic power-down via CE control per port - enabling low-power operation in battery-backed instrumentation.

Key Specifications

Pinout & Package

Package: 48-lead flatpack (FP48), body dimensions ≈ 0.75 in × 0.75 in × 0.11 in, hermetic ceramic construction with side-braze terminations.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C136-100AXC and IS61LV25616AL-100TQLI, the IDT7132LA100L48B uniquely delivers on-chip arbitration, 2 V data retention, and MASTER/SLAVE expandability - making it irreplaceable in deterministic, battery-backed, multi-SRAM-width systems where timing predictability and hardware-enforced coherency are mandatory.

Availability

IDT7132LA100L48B is available at Aetrix Electronics and suitable for real-time industrial PLCs, military avionics data buffers, and automated test equipment requiring stable component supply, long-term obsolescence management, and MIL-PRF-38535 QML-compliant sourcing.

Supply support for IDT7132LA100L48B 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), now part of Renesas Electronics, is a semiconductor company specializing in timing, memory interface, and RF solutions for communications, computing, and industrial markets.

The IDT7132LA100L48B belongs to IDT's high-reliability dual-port SRAM product line, designed specifically for deterministic memory coherency in safety-critical embedded systems requiring hardware arbitration and battery backup.

FAQ

What is the function of BUSYL and BUSYR on the IDT7132LA100L48B?

BUSYL and BUSYR are open-drain arbitration outputs that go LOW when address contention occurs between left and right ports. They require 270 Ω pull-up resistors to VCC. On the IDT7132LA100L48B - configured as a MASTER - these signals indicate which port must stall its write operation, enabling deterministic resolution without external logic. This behavior is intrinsic to the IDT7132LA100L48B and differs from SLAVE IDT7142 devices where BUSY is an input.

Does the IDT7132LA100L48B support battery backup operation?

Yes, the IDT7132LA100L48B supports battery backup data retention at 2.0 V (VDR), maintaining stored data indefinitely during main power loss. This is a defining feature of the LA variant, with ICCDR ≤ 4000 µA (military/industrial) and ≤ 1500 µA (commercial) in retention mode. The IDT7132LA100L48B achieves this via optimized CMOS leakage control - a capability not present in SA versions or competing dual-port SRAMs without explicit LA designation.

Can the IDT7132LA100L48B be used as a SLAVE device in a MASTER/SLAVE configuration?

No, the IDT7132LA100L48B is exclusively a MASTER device with on-chip arbitration logic and BUSY output functionality. SLAVE functionality - including BUSY input behavior and absence of arbitration circuitry - is implemented only in the IDT7142 family. Attempting to use IDT7132LA100L48B as a SLAVE will result in incorrect BUSY signaling and potential data corruption. For width expansion, pair IDT7132LA100L48B with IDT7142LA100Lxx devices.

What is the significance of the 'L48B' suffix in IDT7132LA100L48B?

The 'L48B' suffix denotes the 48-lead flatpack (FP48) package with side-braze terminations and industrial temperature qualification (–40°C to +85°C). The 'B' indicates a specific revision or screening level consistent with IDT's military/industrial ordering nomenclature. This package provides hermetic sealing and mechanical robustness required for high-reliability applications - distinct from DIP, LCC, or PLCC variants denoted by other suffixes like 'D', 'L', or 'P'.

How does the IDT7132LA100L48B handle simultaneous access to the same memory location?

The IDT7132LA100L48B uses hardware arbitration logic to detect address matches between ports and asserts BUSYL or BUSYR within tBAA ≤ 50 ns. The port asserting BUSY first gains access; the contending port's write is internally gated. tAPS = 5 ns ensures priority resolution, and tBDD ≤ 65 ns guarantees valid data appears after BUSY deassertion. This deterministic behavior is built into the IDT7132LA100L48B silicon and requires no firmware intervention.