Renesas 7130SA35C

Overview

7130SA35C from IDT (Integrated Device Technology) is a high-speed 1K × 8 dual-port static RAM configured as a MASTER device with on-chip arbitration logic, 35 ns maximum read cycle time, open-drain BUSY outputs requiring pull-up resistors, and TTL-compatible 5V ±10% operation. It enables full-speed 16-bit-or-wider memory expansion when paired with IDT7140 SLAVE devices in real-time industrial control systems.

For engineers reviewing the 7130SA35C datasheet, 7130SA35C pinout, 7130SA35C application, or 7130SA35C equivalent, key selection criteria include its 35 ns access timing, dual independent asynchronous ports, built-in port arbitration, BUSY/INT flag signaling for inter-port coordination, and industrial temperature range support (–40°C to +85°C).

Technical Context

The 7130SA35C implements fully asynchronous dual-port architecture with separate address, data, and control lines per port (left/right), enabling concurrent read/write operations without external logic. Its on-chip arbitration logic resolves contention via BUSY flag assertion when address matches occur across ports, with tAPS = 5 ns priority setup time ensuring deterministic resolution.

As a MASTER device, it features open-drain BUSYL/BUSYR outputs (requiring external pull-ups) and INTL/INTR flags for port-to-port interrupt signaling. It supports R/W-controlled and CE-controlled write cycles, with tWP = 25 ns minimum write pulse width and tBDD = 35 ns BUSY-disable-to-valid-data delay - critical for synchronized multi-processor memory sharing.

Key Specifications

Pinout & Package

7130SA35C is available in 48-pin ceramic flatpack (FP48) and 48-pin plastic DIP (PDG48/SB48) packages. Pin functions are electrically identical across these variants; mechanical dimensions differ per package code.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C131-35JC and IDT7140SA35C, the 7130SA35C uniquely integrates arbitration and interrupt signaling, eliminating external logic for real-time multi-processor memory sharing - making it irreplaceable in systems requiring hardware-enforced access coordination.

Availability

7130SA35C is available at Aetrix Electronics and suitable for industrial automation, avionics subsystems, military radar processing, and medical imaging equipment requiring stable component supply across extended product lifecycles.

Supply support for 7130SA35C 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 in real-time embedded systems - emphasizing hardware arbitration, low-latency inter-port signaling, and industrial/military reliability.

FAQ

What is the maximum operating temperature range for the 7130SA35C?

The 7130SA35C is rated for industrial temperature operation from –40°C to +85°C, as confirmed in the Recommended Operating Temperature table (2689 tbl 03). This range is validated across all AC and DC electrical specifications, including 35 ns timing parameters and power consumption metrics, making it suitable for enclosed industrial control cabinets and automotive under-hood environments with adequate thermal design.

Does the 7130SA35C require external pull-up resistors on BUSY pins?

Yes, the 7130SA35C requires external pull-up resistors on BUSYL and BUSYR pins. Per Functional Block Diagram Note 1 and Pin Configuration notes, these are open-drain outputs - their logic HIGH state depends on external pull-ups. Typical values range from 4.7 kΩ to 10 kΩ to VCC; insufficient pull-up strength causes slow BUSY rise times, violating tBDA/tBDC timing and risking arbitration failure.

Can the 7130SA35C operate as a standalone dual-port RAM without a SLAVE device?

Yes, the 7130SA35C functions fully as a standalone 8-bit dual-port SRAM. Its MASTER designation refers to its capability to coordinate with IDT7140 SLAVE devices for wider data buses - not a dependency. All dual-port features (independent left/right access, arbitration, BUSY/INT) operate identically whether used alone or in MASTER/SLAVE pairs, as confirmed in the Description section and Truth Table I.

What is the minimum write pulse width (tWP) specification for the 7130SA35C?

The minimum write pulse width (tWP) for the 7130SA35C is 25 ns, as specified in AC Electrical Characteristics Table 10a (2689 tbl 10a) for the X35 speed grade. This parameter applies to both R/W-controlled and CE-controlled write cycles. Violating tWP risks incomplete write operations and data corruption, especially under worst-case voltage/temperature conditions.

How does the 7130SA35C handle simultaneous access to the same memory address from both ports?

The 7130SA35C uses on-chip arbitration logic to resolve simultaneous access: when addresses match, it asserts BUSYL or BUSYR (whichever port met tAPS = 5 ns priority setup first) to block the losing port's write. The winning port completes its operation; the blocked port's write is ignored (Truth Table III). This hardware arbitration prevents data corruption without software intervention or external logic.