Renesas 7025L45PF8

Overview

IDT7025L45PF8 from Integrated Device Technology (IDT) is a high-speed 8K × 16-bit true dual-port static RAM with 128 Kbit capacity, 45 ns maximum read cycle time, TTL-compatible 5 V ±10% supply, and industrial temperature range (–40°C to +85°C). It enables simultaneous independent access from two asynchronous ports-used in real-time inter-processor communication, video frame buffers, and military-grade avionics data exchange.

For engineers reviewing the IDT7025L45PF8 datasheet, IDT7025L45PF8 pinout, IDT7025L45PF8 application, or IDT7025L45PF8 equivalent, key selection criteria include dual-port arbitration logic, BUSY/INT semaphore signaling, 2 V battery backup data retention, low standby current (1 µA typ.), and compatibility with MASTER/SLAVE cascading for 32-bit+ bus expansion.

Technical Context

The IDT7025L45PF8 implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port. Its on-chip arbitration logic resolves contention via BUSY flag assertion (M/S = H) or BUSY input (M/S = L), while eight hardware semaphores (addressed by A0–A2) enable inter-port synchronization without external logic.

It supports byte-selectable writes (UBL/LBL), independent output enables (OEL/OER), and interrupt flag generation (INTL/INTR). The device enters ultra-low-power standby (1 µA typ.) when both chip enables are deasserted, retaining data down to 2 V-critical for battery-backed systems requiring nonvolatile operation during main power loss.

Key Specifications

Pinout & Package

Package: 100-pin Thin Quad Flatpack (TQFP), body size 14 mm × 14 mm × 1.4 mm, lead pitch 0.5 mm, RoHS-compliant green variant available.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C136-45VXI and AS7C3256B-45TIN, the IDT7025L45PF8 uniquely integrates hardware semaphore, BUSY arbitration, and MASTER/SLAVE cascading in a 5 V industrial-temp package-making it irreplaceable for legacy or safety-critical dual-processor systems requiring zero-additional-logic shared memory.

Availability

IDT7025L45PF8 is available at Aetrix Electronics and suitable for real-time inter-processor communication, video frame buffering, and military avionics data exchange requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for IDT7025L45PF8 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

Integrated Device Technology (IDT) is a fabless semiconductor company specializing in timing, memory interface, RF, and sensor solutions for communications, computing, and industrial markets.

The IDT7025 product line delivers high-speed dual-port SRAMs optimized for deterministic, low-latency shared-memory architectures in aerospace, defense, and industrial control-designed to eliminate external arbitration logic and simplify system-level timing.

FAQ

What is the maximum read cycle time specified for the IDT7025L45PF8?

The IDT7025L45PF8 has a maximum read cycle time (tRC) of 45 ns across its rated industrial temperature range (–40°C to +85°C) and 5.0 V ±10% supply. This value is production-tested and guaranteed-not derived from characterization only-and applies to both ports under worst-case voltage and temperature conditions.

Does the IDT7025L45PF8 support battery backup operation, and what is the minimum retention voltage?

Yes, the IDT7025L45PF8 supports battery backup operation with guaranteed data retention at VCC = 2.0 V minimum. In this mode, typical standby current drops to 1 µA, enabling multi-year data holdover during main power loss-confirmed in datasheet Table 10 and applicable only to the "L" (low-power) variant like IDT7025L45PF8.

How does the MASTER/SLAVE configuration work on the IDT7025L45PF8, and what pin controls it?

The MASTER/SLAVE configuration is controlled by the M/S pin: when M/S = H, the left port acts as MASTER with BUSYL asserted as an output; when M/S = L, the left port becomes SLAVE with BUSYL configured as an input. This enables daisy-chained arbitration across multiple IDT7025L45PF8 devices for 32-bit+ bus expansion without external logic.

What are the key differences between the IDT7025L45PF8 and the IDT7025S45PF8 variants?

The IDT7025L45PF8 and IDT7025S45PF8 share identical speed (45 ns), pinout, and functionality-but differ in standby power: IDT7025L45PF8 draws 1 µA typical in full standby (ISB3), while IDT7025S45PF8 draws 5 µA typical. Only the "L" version supports 2 V data retention; the "S" version requires ≥4.5 V for retention.

Can the IDT7025L45PF8 perform simultaneous read and write operations to the same memory location?

Yes-the IDT7025L45PF8 supports true simultaneous read and write to the same address via independent ports. When contention occurs, on-chip arbitration asserts BUSY on the later-accessing port. Valid data appears after tBDD delay (30 ns max), ensuring deterministic behavior without data corruption or bus lockup.