Renesas 7130SA25JI

Overview

7130SA25JI from IDT is a high-speed 1K × 8 dual-port static RAM configured as a MASTER device with on-chip arbitration logic, 25 ns maximum access time, TTL-compatible 5V ±10% supply, and industrial temperature range (–40°C to +85°C). It enables full-speed 16-bit-or-wider memory systems when paired with IDT7140 SLAVE devices in real-time digital signal processing applications.

For engineers reviewing the 7130SA25JI datasheet, 7130SA25JI pinout, 7130SA25JI application, or 7130SA25JI equivalent, this page delivers verified timing parameters, port arbitration behavior, BUSY/INT flag operation, and package-specific DC/AC electrical characteristics required for deterministic dual-ported memory integration in embedded control and communications hardware.

Technical Context

The 7130SA25JI implements fully asynchronous dual-port operation with independent left/right address, control, and I/O buses. Its on-chip arbitration logic resolves simultaneous access contention via BUSY output assertion and priority set-up timing (tAPS = 5 ns), ensuring deterministic write inhibition when address matches occur across ports.

It features open-drain BUSY outputs requiring external pull-up resistors, INT flag generation for inter-port communication, and automatic power-down controlled by CE inputs-supporting three standby current modes (ISB1–ISB4) with typ. 1.0 mA full-CMOS standby at 25°C.

Key Specifications

Pinout & Package

7130SA25JI is supplied in a 48-pin ceramic flatpack (FP48) package with 0.75" × 0.75" body size and side-brazed leads. Pin functions are validated per IDT document 2689 drw 03F.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1354V-25AXI and IDT7142SA25JI, the 7130SA25JI uniquely integrates arbitration logic and open-drain BUSY/INT flags in a 5V-compatible 48-pin FP package-enabling drop-in replacement in legacy industrial designs without redesigning contention-handling firmware or hardware.

Availability

7130SA25JI is available at Aetrix Electronics and suitable for real-time digital signal processing, industrial motion control, telecom line card buffering, and avionics data acquisition requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 7130SA25JI 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-ported memory applications requiring hardware arbitration, inter-processor signaling, and industrial/military temperature reliability-targeting embedded control, radar processing, and avionics systems.

FAQ

What is the function of BUSYL and BUSYR on the 7130SA25JI?

BUSYL and BUSYR are open-drain arbitration status outputs on the 7130SA25JI. When asserted low, they indicate that a write operation on the corresponding port is inhibited due to address contention with the opposite port. Each requires an external pull-up resistor (typically 4.7 kΩ) to VCC. These signals enable real-time hardware coordination without software polling, and their timing is characterized by tBAA ≤ 20 ns and tBDD ≤ 35 ns for the 25 ns speed grade.

Does the 7130SA25JI support battery backup operation?

No, the 7130SA25JI does not support battery backup operation. Only the LA-suffixed variants (e.g., 7130LA25JI) provide 2V data retention capability. The "SA" suffix denotes standard active power consumption (550 mW typ.) and excludes the low-leakage design features required for battery-backed retention. For systems requiring data hold during main power loss, the 7130LA25JI or equivalent LA-grade part must be selected instead of the 7130SA25JI.

How does the 7130SA25JI handle simultaneous access to the same memory location from both ports?

The 7130SA25JI uses on-chip arbitration logic to resolve simultaneous access. When addresses match across ports, the port that satisfies the arbitration priority setup time (tAPS = 5 ns) wins; the losing port's BUSY output goes low, inhibiting its write cycle. This hardware-based resolution prevents data corruption without software intervention. The timing relationship is defined by tBDD (BUSY disable to valid data), which is ≤35 ns for the 7130SA25JI, ensuring deterministic recovery after contention.

What package type is used for the 7130SA25JI, and are there lead-free options?

The 7130SA25JI is packaged in a 48-pin ceramic flatpack (FP48) with side-brazed leads and a 0.75" × 0.75" body. Per IDT documentation, green (lead-free/RoHS-compliant) versions are available under separate ordering codes-however, the 7130SA25JI itself is a legacy industrial-grade part specified with traditional SnPb terminations. Lead-free conversion requires verification of the specific ordering suffix (e.g., "-G" or "-LF") and thermal profile compatibility during reflow soldering.

Can the 7130SA25JI be used as a standalone memory without pairing with a SLAVE device?

Yes, the 7130SA25JI functions fully as a standalone 8-bit dual-port SRAM. Its MASTER designation indicates it contains on-chip arbitration logic and BUSY outputs-features unnecessary in single-device configurations but essential when expanding to 16-bit or wider data paths using IDT7140 SLAVE devices. In standalone use, both ports operate independently with full read/write capability, and BUSY/INT pins may be left unconnected or tied inactive (pulled high via resistors) if unused.