Renesas 7132LA55C

Overview

7132LA55C from IDT is a high-speed 2K × 8 dual-port static RAM configured as a MASTER device with on-chip arbitration logic, BUSY output flag (open-drain), 55 ns max read cycle time, TTL-compatible 5V ±10% supply, and battery backup data retention at 2V - used in real-time interprocessor communication and shared-memory systems requiring concurrent asynchronous access.

For engineers reviewing the 7132LA55C datasheet, 7132LA55C pinout, 7132LA55C application, or 7132LA55C equivalent, this page delivers verified timing specs (tRC = 55 ns), standby current (ISB3 = 0.2 mA typ.), BUSY arbitration behavior, 48-pin flatpack package mapping, and validated alternatives for dual-port SRAM replacement in industrial embedded control and military-grade avionics subsystems.

Technical Context

The 7132LA55C implements independent left/right ports with separate address (A0–A10), control (CEL/CER, OEL/OER, R/WL/R/WR), and I/O (I/O0–I/O7) lines, enabling true asynchronous read/write operations without external logic. Its on-chip arbitration logic resolves port contention by asserting BUSYL/BUSYR outputs when address matches occur, with tAPS = 5 ns priority setup time ensuring deterministic resolution.

As a low-power LA variant, it supports 2V data retention during battery backup mode, with full standby current ISB3 = 0.2 mA (typ.) at VCC ≥ 4.8V and CMOS-level inputs. The open-drain BUSY outputs require 270Ω pull-up resistors per datasheet Note 1 and Figure 3, and are active only in MASTER configuration - distinguishing it functionally from SLAVE IDT7142 devices.

Key Specifications

Pinout & Package

7132LA55C is packaged in a 48-lead flatpack (FP48), measuring approximately 0.75 in × 0.75 in × 0.11 in, with all VCC and GND pins requiring direct connection per Pin Configuration notes.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C133-55JC and IDT7142LA55C, the 7132LA55C uniquely integrates arbitration logic and open-drain BUSY outputs in a single MASTER device, enabling simpler PCB layout, lower BOM count, and guaranteed deterministic contention resolution without external components.

Availability

7132LA55C is available at Aetrix Electronics and suitable for real-time interprocessor communication, avionics data buffering, and industrial PLC shared memory requiring stable component supply across extended production lifecycles.

Supply support for 7132LA55C 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 IDT7132/7142 product line was designed specifically for deterministic dual-port memory applications requiring hardware arbitration, low-power battery backup, and industrial/military temperature resilience - targeting avionics, test equipment, and real-time control systems.

FAQ

What is the maximum read cycle time specified for the 7132LA55C?

The 7132LA55C has a maximum read cycle time (tRC) of 55 ns, as confirmed in Table 8a of the datasheet under the "7132X55" speed grade. This parameter defines the minimum interval between successive read operations on the same port and is measured under standard AC test conditions (VCC = 5.0 V ±10%, TA = +25°C). The 7132LA55C part number explicitly denotes the 55 ns speed grade and LA low-power variant.

Does the 7132LA55C support battery backup operation, and what voltage is required?

Yes, the 7132LA55C supports battery backup operation with guaranteed data retention at VCC = 2.0 V, as documented in Table 6 ("Data Retention Characteristics") and the "Battery backup operation -2V data retention (LA only)" feature bullet. This capability is exclusive to LA variants and is validated for industrial temperature range (–40°C to +85°C). The 7132LA55C draws ≤4 µA in data retention mode per datasheet specification.

How does the BUSY arbitration logic function on the 7132LA55C?

The 7132LA55C implements on-chip arbitration logic that asserts BUSYL or BUSYR (open-drain outputs) when both ports attempt access to the same memory address. As a MASTER device, it uses tAPS = 5 ns priority setup time to determine which port wins; the losing port's write is internally gated. BUSY signals require 270Ω pull-up resistors per datasheet Figure 3 and Note 1 - a design requirement unique to the 7132LA55C among its family.

What package type is used for the 7132LA55C, and what are its mechanical dimensions?

The 7132LA55C is supplied in a 48-lead flatpack (FP48) package, with mechanical dimensions of approximately 0.75 in × 0.75 in × 0.11 in, as specified in the "Pin Configurations" section (Note 3). This hermetically sealed package is qualified for industrial and military applications, and differs from the 48-pin DIP, LCC, and 52-pin PLCC options available for other variants in the IDT7132/7142 family.

Can the 7132LA55C be used as a standalone dual-port RAM without a companion SLAVE device?

Yes, the 7132LA55C is fully functional as a standalone 8-bit dual-port SRAM. Its MASTER functionality - including on-chip arbitration and BUSY outputs - operates independently. The SLAVE IDT7142 is only required when expanding data bus width beyond 8 bits (e.g., to 16-bit or wider systems). The 7132LA55C datasheet explicitly states it is "designed to be used as a stand-alone 8-bit Dual-Port RAM" in the Description section.