Renesas 7130LA55TF8

Overview

7130LA55TF8 from IDT (Integrated Device Technology) is a high-speed 1K × 8 dual-port static RAM with master arbitration logic, 55 ns maximum access time, TTL-compatible 5 V ±10% supply, and battery-backed data retention down to 2 V. It supports fully asynchronous dual-port operation for real-time interprocessor communication in embedded control systems.

For engineers reviewing the 7130LA55TF8 datasheet, 7130LA55TF8 pinout, 7130LA55TF8 application, or 7130LA55TF8 equivalent, this page delivers verified specifications, package mapping, port arbitration timing, BUSY/INT signaling behavior, and industrial-temperature (-40°C to +85°C) operation - critical for deterministic memory coherency in dual-CPU designs.

Technical Context

The 7130LA55TF8 implements on-chip port arbitration logic that resolves simultaneous access to the same memory location via BUSY flag assertion, with tBDD ≤ 55 ns and tAPS = 5 ns priority setup. Its left/right ports operate independently with separate CE/OE/R/W controls, enabling concurrent read/write without external logic.

As a MASTER device, it drives open-drain BUSYL/BUSYR outputs requiring pull-up resistors, while supporting INTL/INTR flags for hardware interrupt-driven synchronization between processors. The LA variant guarantees 2 V data retention with ICCDR ≤ 4000 µA (military/industrial) and ISB3 ≤ 10 µA full standby current.

Key Specifications

Pinout & Package

7130LA55TF8 is packaged in a 64-pin STQFP (Small Thin Quad Flat Package), body size 10 mm × 10 mm × 1.4 mm, lead-free and RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1354V-55AXC and IDT7140LA55TF8, the 7130LA55TF8 uniquely integrates arbitration logic and open-drain BUSY outputs - eliminating external components for conflict resolution while maintaining 55 ns performance and 2 V data retention in industrial temperature operation.

Availability

7130LA55TF8 is available at Aetrix Electronics and suitable for industrial PLC controllers, military avionics data buffers, and telecom line card buffers requiring stable component supply, long-term lifecycle support, and guaranteed industrial-temperature performance.

Supply support for 7130LA55TF8 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 IDT7130 family was designed specifically for deterministic dual-processor memory sharing, emphasizing on-chip arbitration, low-latency access, and robust operation across military, industrial, and commercial temperature grades.

FAQ

What is the maximum operating temperature range for the 7130LA55TF8?

The 7130LA55TF8 is rated for industrial temperature operation from -40°C to +85°C. This range is explicitly confirmed in the "Recommended Operating Temperature and Supply Voltage" table (2689 tbl 03), and applies to all LA-speed variants including the 55 ns version. It is not rated for commercial (0°C to +70°C) or military (-55°C to +125°C) grades unless specified in a different suffix.

Does the 7130LA55TF8 support true dual-port read/write concurrency?

Yes, the 7130LA55TF8 supports fully asynchronous dual-port operation: either port can perform independent read or write cycles simultaneously. However, when both ports access the same memory address, on-chip arbitration asserts BUSYL or BUSYR to inhibit the later-arriving write - ensuring data coherency without external logic. This behavior is defined in Truth Table III and timing diagrams (2689 drw 12–15).

What is the purpose of the open-drain BUSY outputs on the 7130LA55TF8?

The BUSYL and BUSYR pins on the 7130LA55TF8 are open-drain outputs used for port arbitration. When asserted (pulled LOW), they signal that the opposite port is accessing the same memory location, blocking writes on the affected side. External pull-up resistors are mandatory, as noted in Functional Block Diagram Notes (1) and Pin Configurations (2). This design enables wired-OR expansion across multiple dual-port devices.

Can the 7130LA55TF8 retain data at 2 V, and under what conditions?

Yes, the 7130LA55TF8 guarantees data retention at VCC = 2.0 V, as specified in "Data Retention Characteristics (LA Version Only)" (2689 tbl 07). This mode requires CE > VCC − 0.2 V (i.e., chip disable) and applies only to LA variants. Retention current ICCDR is ≤ 4000 µA (military/industrial) at +25°C, enabling battery backup without refresh circuitry.

How does the interrupt functionality work on the 7130LA55TF8?

The 7130LA55TF8 provides hardware interrupt flags INTL and INTR, controlled via dedicated address patterns (e.g., writing to A9–A0 = 3FEh sets INTL). These are active-low, edge-triggered signals used for port-to-port event notification. Timing is characterized in tbl 12a/b: tINS ≤ 25 ns (25 ns version) or ≤ 45 ns (55/100 ns versions), enabling low-latency interprocessor signaling without polling overhead.