Renesas 7025L45PFI

Overview

7025L45PFI from IDT (Integrated Device Technology) is a high-speed 8K × 16-bit true dual-port static RAM with independent left/right ports, 45 ns maximum read cycle time, industrial temperature range (–40°C to +85°C), and 1 mW typical standby power. It supports simultaneous asynchronous access, on-chip semaphore arbitration, and battery backup data retention at 2 V - used in real-time embedded systems requiring deterministic inter-processor communication.

For engineers reviewing the 7025L45PFI datasheet, 7025L45PFI pinout, 7025L45PFI application, or 7025L45PFI equivalent, key selection criteria include dual-port arbitration timing (tAPS = 5 ns), BUSY flag behavior under M/S = VIH, 100-pin TQFP package compatibility, and low-power operation for battery-backed control memory in avionics and industrial PLCs.

Technical Context

The 7025L45PFI implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port. Its on-chip arbitration logic resolves contention via hardware BUSY flag assertion and priority setup (tAPS = 5 ns), enabling deterministic port-to-port synchronization without external logic.

It integrates full semaphore signaling (8 flags addressed by A0–A2), interrupt flag generation (INTL/INTR), and master/slave cascading capability via M/S pin - allowing expansion to 32-bit+ word widths while maintaining full-speed error-free operation in multi-CPU systems.

Key Specifications

Pinout & Package

7025L45PFI is packaged in a 100-pin Thin Quad Flatpack (TQFP), body size 14 mm × 14 mm × 1.4 mm, lead pitch 0.5 mm, RoHS-compliant and green-part qualified.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV33-45AXI and AS7C38099B-45TIN, the 7025L45PFI uniquely delivers 2V data retention, hardware semaphore registers, and master/slave cascading in a single 5 V device - reducing system-level design effort and improving reliability in safety-critical dual-CPU architectures.

Availability

7025L45PFI is available at Aetrix Electronics and suitable for avionics flight control, industrial PLC memory buffering, and radar signal processing requiring stable component supply across extended product lifecycles.

Supply support for 7025L45PFI 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 since 2019.

The IDT7025 product line was designed specifically for deterministic, low-latency inter-processor communication in real-time embedded systems - emphasizing hardware arbitration, dual-port concurrency, and industrial-grade reliability.

FAQ

What is the maximum operating temperature range for the 7025L45PFI?

The 7025L45PFI is rated for industrial temperature operation from –40°C to +85°C. This range is fully specified and tested per the datasheet, with all AC and DC parameters guaranteed across this span without derating. The device uses CMOS process technology optimized for thermal stability in uncontrolled environments such as factory floors or vehicle-mounted control units.

Does the 7025L45PFI support battery backup operation, and what voltage is required?

Yes, the 7025L45PFI supports battery backup operation with guaranteed data retention at 2.0 V (VDR). In retention mode, it draws ≤4000 µA (typical 100 µA) from the backup source. This feature is exclusive to the "L" (low-power) variant and is validated across the full industrial temperature range - enabling safe state preservation during main power failure.

How does the M/S pin affect BUSY flag behavior on the 7025L45PFI?

When M/S = H (high), the 7025L45PFI operates as a master: BUSYR is an output that asserts when the right port attempts to write to an address currently being written by the left port. When M/S = L (low), it operates as a slave: BUSYR becomes an input used to receive arbitration signals from a master device - enabling hierarchical multi-chip memory expansion without external logic.

What is the purpose of the semaphore function in the 7025L45PFI, and how is it accessed?

The 7025L45PFI includes eight hardware semaphore flags used for atomic resource locking between processors. They are accessed via the same I/O0–I/O15 pins using SEM = L, with address bits A0–A2 selecting the flag. Write to I/O0 sets the flag; read returns its state across all 16 bits. This eliminates software race conditions and removes need for external lock registers in multi-CPU designs.

Is the 7025L45PFI pin-compatible with other members of the IDT7025 family, such as the 7025S45PFI?

Yes, the 7025L45PFI is pin-compatible with all 100-pin TQFP variants in the IDT7025 family, including the 7025S45PFI. Both share identical pinout, package dimensions, and signal definitions. The only functional difference is power consumption: the "L" version offers 0.2 mA typical ISB3 vs. 1.0 mA for the "S" version, and enables 2V data retention - all other timing, logic, and interface behavior is identical.