Renesas 7025L45PF

Overview

IDT7025L45PF from Integrated Device Technology (IDT) is a high-speed 8K × 16-bit true dual-port static RAM with 20 ns maximum access time, TTL-compatible 5V ±10% operation, and industrial temperature range (–40°C to +85°C). It supports simultaneous independent read/write access on left and right ports, features on-chip semaphore logic and BUSY arbitration, and enables 32-bit+ memory expansion via MASTER/SLAVE cascading in real-time control systems.

For engineers reviewing the IDT7025L45PF datasheet, IDT7025L45PF pinout, IDT7025L45PF application, or IDT7025L45PF equivalent, key selection considerations include its 20 ns read cycle time, 1 µA typical standby current (L-version), dual-port arbitration behavior, and 84-pin PGA package compatibility with legacy military/industrial backplane designs.

Technical Context

The IDT7025L45PF implements fully asynchronous dual-port architecture with separate address, data, and control buses per port (A0L–A12L/I/O0L–I/O15L and A0R–A12R/I/O0R–I/O15R), enabling concurrent access without external logic. Its on-chip arbitration uses BUSY flag signaling and M/S pin configuration to resolve contention during simultaneous access to identical addresses.

It integrates full hardware semaphore support-eight flags addressed by A0–A2-with dedicated SEM, INTL/INTR, and BUSYL/BUSYR signals. The device operates in battery backup mode down to 2V for data retention and supports byte-level writes via UBL/LBL controls, making it suitable for deterministic real-time inter-processor communication.

Key Specifications

Pinout & Package

Package: 84-pin ceramic Pin Grid Array (PLG84), body size ≈ 1.15 in × 1.15 in × 0.17 in, hermetic, MIL-PRF-38535 QML-qualified for high-reliability applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1370D-200BAXI and AS7C3256A-20JCIN, the IDT7025L45PF uniquely delivers true asynchronous dual-port operation with integrated arbitration and semaphore logic in a hermetic PGA package-enabling drop-in replacement in legacy MIL-STD-1553 or VMEbus systems without redesigning timing or layout.

Availability

IDT7025L45PF is available at Aetrix Electronics and suitable for real-time digital signal processing, avionics flight control systems, and industrial PLC motion controllers requiring stable component supply across extended product lifecycles.

Supply support for IDT7025L45PF 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), now part of Renesas Electronics, is a fabless semiconductor company specializing in timing, memory interface, RF, and sensor solutions for communications, computing, and industrial markets.

The IDT7025L45PF belongs to IDT's legacy high-reliability dual-port SRAM product line, designed specifically for deterministic inter-processor communication in military, aerospace, and industrial control systems demanding zero-latency arbitration and data coherency.

FAQ

What is the maximum operating temperature range for the IDT7025L45PF?

The IDT7025L45PF is rated for industrial temperature operation from –40°C to +85°C. This specification is confirmed in the "Recommended DC Operating Conditions" table (Table 2683 tbl 05) and applies specifically to the 'L' (low-power) variant in the 84-pin PGA package. It does not support extended military-grade ranges (–55°C to +125°C) unless explicitly ordered as a MIL-PRF-38535 QML-qualified variant.

Does the IDT7025L45PF support battery backup operation, and what voltage is required?

Yes, the IDT7025L45PF supports battery backup data retention at VCC = 2.0 V minimum, as specified in Table 2683 tbl 10. This capability is exclusive to the 'L' version and enables memory state preservation during main power loss. The device draws ≤4000 µA (typical 100 µA) in retention mode across all temperature grades.

How does the M/S pin affect BUSY signal behavior on the IDT7025L45PF?

When M/S = H (high), the IDT7025L45PF operates as Master: BUSYL and BUSYR become outputs that assert during port contention. When M/S = L (low), it operates as Slave: BUSYL and BUSYR become inputs used to detect contention from a Master device. This dual-role configuration is fundamental to cascade-based 32-bit+ memory expansion and is detailed in Figure 2683 drw 01 and Truth Table 2683 tbl 01.

What is the standby current consumption of the IDT7025L45PF in full CMOS standby mode?

In full standby mode (ISB3), where both chip enables are held high and all inputs are at valid CMOS levels (VIN > VCC − 0.2 V or VIN < 0.2 V), the IDT7025L45PF consumes 0.2 µA typical current, as documented in Table 2683 tbl 09a. This ultra-low value enables energy-efficient hold states in battery-backed systems without compromising data integrity.

Can the IDT7025L45PF perform simultaneous read operations on both ports to the same memory address?

Yes, the IDT7025L45PF supports true simultaneous reads to the same memory location on both ports - a defining feature of its "true dual-ported memory cells." This capability is explicitly stated in the Features section (page 1) and requires no arbitration or delay, distinguishing it from pseudo-dual-port or pipelined architectures that serialize concurrent accesses.