Renesas 7132LA55L48B

Overview

7132LA55L48B from IDT is a high-speed 2K × 8 dual-port static RAM configured as a MASTER device with on-chip arbitration logic, 55 ns maximum read/write cycle time, TTL-compatible 5V ±10% operation, and battery-backed data retention down to 2V - used in real-time embedded systems requiring concurrent access to shared memory by two independent controllers.

For engineers reviewing the 7132LA55L48B datasheet, 7132LA55L48B pinout, 7132LA55L48B application, or 7132LA55L48B equivalent, this page delivers verified timing specs, BUSY arbitration behavior, industrial temperature support (–40°C to +85°C), flatpack package details, and direct alternative part comparisons for memory subsystem design and upgrade decisions.

Technical Context

The 7132LA55L48B implements asymmetric port arbitration where BUSYL and BUSYR are open-drain outputs (requiring 270 Ω pull-ups) that assert during address contention to inhibit writes on the contending port. It supports R/W-controlled and CE-controlled write cycles with tWC = 55 ns, tWP = 30 ns, and tBDD ≤ 50 ns for port-to-port synchronization.

As a MASTER-only device, it integrates arbitration priority logic (tAPS = 5 ns), BUSY access timing referenced to address or chip enable (tBAA/tBAC ≤ 30 ns), and automatic power-down via CE-driven ISB3 ≤ 4 µA (CMOS-level standby). It does not support SLAVE-mode operation or BUSY input functionality.

Key Specifications

Pinout & Package

48-pin flatpack (FP48) package with 0.050″ lead pitch, side-brazed ceramic construction, and index mark at Pin 1. All VCC pins (Pins 24, 48) must be decoupled; all GND pins (Pins 1, 25) require low-inductance grounding.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C133-55PC and IDT7142LA55L48B, the 7132LA55L48B uniquely combines industrial temperature rating, open-drain BUSY outputs for scalable arbitration, and 2V battery retention - making it irreplaceable in ruggedized, power-fail-resilient dual-processor designs.

Availability

7132LA55L48B is available at Aetrix Electronics and suitable for real-time digital signal processing, industrial motion control, military avionics data logging, and telecom line card buffering requiring stable component supply across extended product lifecycles.

Supply support for 7132LA55L48B 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 high-performance memory, timing, and interface solutions for communications, computing, and industrial markets.

The IDT7132 family was designed specifically for deterministic dual-processor memory sharing in mission-critical embedded systems - emphasizing hardware arbitration, low-power standby, and robust packaging for harsh environments.

FAQ

What is the function of BUSYL and BUSYR on the 7132LA55L48B?

BUSYL and BUSYR are open-drain outputs indicating address contention between left and right ports. When asserted (LOW), they inhibit writes on the contending port. The 7132LA55L48B requires external 270 Ω pull-up resistors to VCC on both pins to generate valid HIGH logic levels. These signals are not present on SLAVE devices like IDT7142.

Does the 7132LA55L48B support battery backup operation?

Yes, the 7132LA55L48B supports data retention at VCC = 2.0 V with ICCDR ≤ 1500 µA (commercial grade). This mode preserves memory contents during main power failure and is enabled automatically when VCC drops below 4.5 V while CE remains asserted. It is exclusive to LA versions - SA variants lack this capability.

Can the 7132LA55L48B be used as a SLAVE device in a width-expanded array?

No, the 7132LA55L48B is exclusively a MASTER device with on-chip arbitration logic and BUSY outputs. For SLAVE functionality in width-expansion configurations, IDT7142LA55L48B must be used. Attempting to configure 7132LA55L48B as a SLAVE will result in incorrect BUSY signaling and potential data corruption due to unmanaged arbitration.

What is the maximum operating temperature range for the 7132LA55L48B?

The 7132LA55L48B is rated for industrial temperature operation from –40°C to +85°C. This specification is validated across all electrical parameters including tRC = 55 ns, ISB3 ≤ 4 µA, and VDR = 2.0 V. Military-grade variants (e.g., 7132LA55M) extend to –55°C to +125°C but use different ordering codes.

Which package type does the 7132LA55L48B use, and what are its key mechanical features?

The 7132LA55L48B uses a 48-lead flatpack (FP48) package: hermetically sealed ceramic body measuring 0.75″ × 0.75″ × 0.11″, side-brazed leads, and an index mark at Pin 1. It provides superior moisture resistance and thermal stability versus plastic DIP or PLCC, making it suitable for aerospace and industrial deployments where long-term reliability is mandatory.