Renesas 7130LA25PF8

Overview

7130LA25PF8 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, 25 ns maximum access time, 1 mA typical standby current, and battery backup data retention down to 2 V. It enables error-free 16-bit-or-wider memory expansion when paired with IDT7140 SLAVE devices in real-time industrial control systems.

For engineers reviewing the 7130LA25PF8 datasheet, 7130LA25PF8 pinout, 7130LA25PF8 application, or 7130LA25PF8 equivalent, key selection criteria include its dual-port asynchronous operation, BUSY/INT flag signaling for port-to-port coordination, 2V data retention capability, TTL-compatible 5V ±10% supply, and industrial temperature range (–40°C to +85°C).

Technical Context

The 7130LA25PF8 implements fully independent left/right ports with separate address, data, and control lines (A0L–A9L/I/O0L–I/O7L/CEL/OEL/R/WL/BUSYL/INTL and A0R–A9R/I/O0R–I/O7R/CER/OER/R/WR/BUSYR/INTR), enabling concurrent read/write access without external logic. Its on-chip arbitration logic resolves contention via BUSY output assertion and priority timing (tAPS = 5 ns min).

It supports three power modes: active (ICC = 110 mA typ.), TTL-level standby (ISB1 = 25 mA max at 25 ns), and full CMOS-level standby (ISB3 = 0.2 µA typ.), with data retention at 2 V (ICCDR ≤ 4000 µA). The BUSY outputs are open-drain and require external pull-up resistors.

Key Specifications

Pinout & Package

7130LA25PF8 is housed in a 48-pin ceramic flatpack (FP48), measuring approximately 0.75 in × 0.75 in × 0.11 in, with side-brazed leads and hermetic sealing suitable for military and industrial applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C131-25JC and IDT7140LA25PF8, the 7130LA25PF8 uniquely integrates arbitration, BUSY/INT signaling, and 2V data retention in a single MASTER device - making it irreplaceable for self-contained dual-processor buffering where deterministic contention resolution and power-fail resilience are required.

Availability

7130LA25PF8 is available at Aetrix Electronics and suitable for real-time motion control, redundant safety controllers, industrial data loggers, and dual-processor communication buffers requiring stable component supply across extended product lifecycles.

Supply support for 7130LA25PF8 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 timing, memory, and interface solutions, now part of Renesas Electronics.

The IDT7130/7140 family was designed specifically for deterministic, low-latency dual-processor and real-time control applications requiring hardware-managed port arbitration and battery-backed memory retention.

FAQ

What is the function of the BUSY outputs on the 7130LA25PF8?

The BUSYL and BUSYR pins on the 7130LA25PF8 are open-drain arbitration flags that go low when the corresponding port attempts to access an address currently being written to by the opposite port. This signal blocks writes on the contending side until the conflict resolves, ensuring data coherency without software intervention. External pull-up resistors are required per datasheet Note 2, and the 7130LA25PF8 is the only device in the family with BUSY outputs - SLAVE devices use them as inputs.

Does the 7130LA25PF8 support true simultaneous read/write operations?

Yes, the 7130LA25PF8 supports fully asynchronous, independent read and write operations on its left and right ports - provided no address contention occurs. When both ports access different addresses, operations proceed concurrently with no timing penalty. Contention triggers BUSY assertion, which delays the later-arriving write until completion, preserving data integrity. This behavior is hardware-enforced and requires no external logic.

What is the significance of the "LA" suffix in 7130LA25PF8?

"LA" denotes the Low-Power, Battery-Backup variant of the IDT7130. Unlike the "SA" (Standard Active) version, the 7130LA25PF8 guarantees data retention at 2.0 V supply (VDR = 2.0 V) with ICCDR ≤ 4000 µA at industrial temperature, enabling operation from backup batteries or supercapacitors during main power loss. It also achieves lower standby current (1 mA typical vs. 5 mA for SA) due to optimized CMOS design.

Can the 7130LA25PF8 be used without external pull-up resistors on BUSY and INT pins?

No - the BUSYL, BUSYR, INTL, and INTR pins on the 7130LA25PF8 are open-drain outputs and will not drive logic-high levels without external pull-up resistors. Per datasheet Notes 1 and 2, these pins require pull-ups to VCC (typically 4.7 kΩ–10 kΩ) to generate valid HIGH signals for arbitration and interrupt signaling. Omitting pull-ups results in undefined or floating states, causing unreliable contention detection and missed interrupts.

How does the 7130LA25PF8 differ from the IDT7140LA25PF8?

The 7130LA25PF8 is the MASTER dual-port SRAM with on-chip arbitration logic, BUSY/INT outputs, and standalone operation capability. The IDT7140LA25PF8 is the SLAVE device: it has identical speed, retention, and package but lacks arbitration logic, uses BUSY/INT as inputs only, and cannot operate alone - it must be paired with a 7130LA25PF8 to form a 16-bit-or-wider memory system. Their pinouts differ in control signal roles, and they are not pin-compatible replacements.