Renesas 7130LA25TFI

Overview

7130LA25TFI 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 read cycle time, 2V data retention capability, and industrial temperature range (–40°C to +85°C). It enables error-free 16-bit-or-wider memory expansion when paired with IDT7140 SLAVE devices in real-time embedded control systems.

For engineers reviewing the 7130LA25TFI datasheet, 7130LA25TFI pinout, 7130LA25TFI application, or 7130LA25TFI equivalent, this page delivers verified timing parameters, port arbitration behavior, battery-backed standby operation, and direct substitution guidance for dual-port SRAM selection in deterministic multi-processor interfaces.

Technical Context

The 7130LA25TFI implements fully asynchronous dual-port access with independent left/right address, control, and I/O buses. Its on-chip arbitration logic resolves simultaneous access contention via BUSY flag assertion, with tBDD ≤ 35 ns and tAPS = 5 ns priority setup time.

As a MASTER-only device, it features open-drain BUSYL/BUSYR outputs requiring external pull-ups, INTL/INTR interrupt flags for inter-port signaling, and CE-controlled power-down modes yielding 1 µA full-standby current at CMOS-level inputs.

Key Specifications

Pinout & Package

7130LA25TFI is supplied in a 64-pin STQFP package (PPG64), measuring 10 mm × 10 mm × 1.4 mm, with exposed thermal pad and lead-free finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV25 and IDT7142LA25TFI, the 7130LA25TFI uniquely integrates arbitration, retains data at 2 V, and operates as a self-contained MASTER - reducing BOM count, layout risk, and qualification effort in industrial and aerospace designs.

Availability

7130LA25TFI is available at Aetrix Electronics and suitable for industrial PLCs, avionics subsystems, medical imaging buffers, and automated test equipment requiring stable component supply across extended product lifecycles.

Supply support for 7130LA25TFI 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), now part of Renesas Electronics, specializes in high-performance timing, memory, and interface solutions for mission-critical systems.

The IDT7130 family was engineered for deterministic dual-processor communication in industrial automation, defense electronics, and medical instrumentation where hardware-enforced memory coherency is non-negotiable.

FAQ

What is the key functional distinction between 7130LA25TFI and IDT7140 devices?

The 7130LA25TFI is a MASTER dual-port SRAM with on-chip arbitration logic and open-drain BUSY outputs, enabling standalone operation and conflict resolution. In contrast, IDT7140 devices are SLAVE-only: they accept BUSY as input, lack arbitration circuitry, and require pairing with a 7130LA25TFI to form a complete dual-port system. This architectural split allows scalable memory width expansion without redesigning arbitration logic.

Does 7130LA25TFI support true simultaneous read/write operations across ports?

Yes - the 7130LA25TFI permits fully asynchronous, simultaneous read and write operations on left and right ports. When contention occurs (e.g., both ports access the same address), its hardware arbitration asserts BUSYL or BUSYR within 20 ns (tBAA), blocking the later port's write until the first completes. This ensures data integrity without software intervention or external logic.

What is the significance of the 'LA' suffix in 7130LA25TFI?

The 'LA' denotes Low-power Active/Standby mode with battery backup capability. Unlike 'SA' variants, the 7130LA25TFI guarantees data retention down to 2.0 V supply voltage and achieves 0.2 µA full-standby current (ISB3) when both chip enables are held at CMOS-high levels. This makes it suitable for systems requiring persistent memory during main power loss.

How does the interrupt functionality work in 7130LA25TFI?

The 7130LA25TFI uses dedicated INTL and INTR open-drain outputs to signal inter-port events. Writing to address 3FF on the left port sets the right-port INTR flag; writing to 3FE on the right port sets the left-port INTL flag. These flags remain asserted until cleared by a corresponding write - enabling reliable handshaking between processors without polling overhead.

Is 7130LA25TFI pin-compatible with faster or slower speed grades in the same family?

Yes - all 7130LA variants (e.g., 7130LA20, 7130LA25, 7130LA35) share identical 64-pin STQFP (PPG64) packaging and pinout. Speed grade differences affect only internal timing parameters (tRC, tAA, etc.), not electrical or mechanical compatibility. This allows design reuse and field upgrades without PCB revision.