Renesas 7130SA55TFI/2703

Overview

7130SA55TFI/2703 from IDT is a high-speed 1K × 8 dual-port static RAM configured as a MASTER device with on-chip arbitration logic, 55 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 expansion when paired with IDT7140 SLAVE devices in real-time embedded control systems.

For engineers reviewing the 7130SA55TFI/2703 datasheet, 7130SA55TFI/2703 pinout, 7130SA55TFI/2703 application, or 7130SA55TFI/2703 equivalent, key selection criteria include BUSY-flag arbitration timing (tBAA ≤ 55 ns), dual-port asynchronous read/write independence, low standby current (ISB1 = 20 mA typ.), and compatibility with 48-pin TQFP packaging for space-constrained industrial controllers.

Technical Context

The 7130SA55TFI/2703 implements fully independent left/right ports with separate address (A0L–A9L, A0R–A9R), data (I/O0L–I/O7L, I/O0R–I/O7R), and control lines (CEL/OEL/R/WL, CER/OER/R/WR), enabling concurrent access without external logic. Its on-chip arbitration resolves port contention via open-drain BUSYL/BUSYR outputs requiring external pull-up resistors.

It supports port-to-port interrupt signaling (INTL/INTR) and BUSY-driven write inhibition during address collisions, with tAPS = 5 ns arbitration priority setup time ensuring deterministic resolution. The device operates in battery-retention–incompatible SA variant, distinguishing it from LA-series parts.

Key Specifications

Pinout & Package

7130SA55TFI/2703 is housed in a 48-pin TQFP (Thin Quad Flat Package) with 0.5 mm pitch, body size 7 mm × 7 mm × 1.4 mm, lead-free and RoHS-compliant construction.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C135-55JC and IDT7140SA55TFI/2703, the 7130SA55TFI/2703 uniquely integrates arbitration logic and MASTER functionality in a single 48-pin TQFP, reducing BOM count and eliminating timing-critical external arbitration design while enabling scalable memory width expansion.

Availability

7130SA55TFI/2703 is available at Aetrix Electronics and suitable for real-time motion controllers, redundant industrial PLCs, avionics data acquisition units, and medical imaging frame buffers requiring stable component supply across extended production lifecycles.

Supply support for 7130SA55TFI/2703 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 semiconductor company specializing in timing, memory interface, and RF solutions, now part of Renesas Electronics since 2019.

The IDT7130/7140 family was engineered for deterministic, low-latency shared memory in hard real-time embedded systems-emphasizing on-chip arbitration, dual-port independence, and industrial reliability without battery backup.

FAQ

What is the function of BUSYL and BUSYR on the 7130SA55TFI/2703?

BUSYL and BUSYR are open-drain arbitration flag outputs unique to the MASTER 7130SA55TFI/2703. When asserted low, they inhibit writes to the corresponding port during address contention. Each requires an external pull-up resistor (typically 4.7 kΩ) to VCC. These signals enable hardware-enforced mutual exclusion without software intervention, ensuring data integrity in concurrent access scenarios.

Can the 7130SA55TFI/2703 operate as a standalone 8-bit memory without a SLAVE device?

Yes, the 7130SA55TFI/2703 functions fully as a stand-alone 1K × 8 dual-port SRAM. Its MASTER capability-including on-chip arbitration, BUSY outputs, and interrupt flags-is operational even without pairing with an IDT7140 SLAVE. The SLAVE device is optional and used only to expand data bus width beyond 8 bits in wider memory systems.

What is the maximum clock frequency supported by the 7130SA55TFI/2703?

The 7130SA55TFI/2703 is an asynchronous SRAM and does not use a clock signal. Its performance is defined by timing parameters such as tRC (55 ns read cycle time) and tWC (55 ns write cycle time). System timing is governed by setup/hold relationships (e.g., tAS = 0 ns, tDH = 0 ns), allowing interface with microcontrollers or FPGAs operating up to ~18 MHz effective bandwidth per port.

Does the 7130SA55TFI/2703 support battery backup for data retention?

No, the 7130SA55TFI/2703 is the SA (Standard Active) variant and does not support battery backup. Data retention capability (down to 2.0 V) is exclusive to the LA (Low-power Active) versions such as 7130LA55TFI/2703. The SA variant draws higher standby current (ISB1 = 20 mA typ.) and lacks the internal circuitry for low-voltage retention mode.

How does interrupt generation work on the 7130SA55TFI/2703?

The 7130SA55TFI/2703 uses dedicated INTL and INTR open-drain outputs to signal inter-port events. Writing to address 3FFH on one port sets the interrupt flag on the opposite port; writing to 3FEH clears it. These signals require external pull-up resistors and are synchronized to the target port's control timing-tINS = 45 ns (max) defines the delay from write completion to flag assertion.