Renesas 7025L25PFI

Overview

7025L25PFI from IDT (Integrated Device Technology) is a high-speed 8K × 16-bit true dual-port static RAM with independent asynchronous left/right ports, 25 ns maximum read cycle time, 1 mA typical standby current, and industrial temperature range (–40°C to +85°C). It enables simultaneous access to the same memory location and supports master/slave cascading for 32-bit+ bus expansion in real-time embedded control systems.

For engineers reviewing the 7025L25PFI datasheet, 7025L25PFI pinout, 7025L25PFI application, or 7025L25PFI equivalent, key selection considerations include dual-port arbitration timing (tBDD ≤ 30 ns), semaphore flag support (8 flags via A0–A2), battery backup data retention at 2 V, TTL-compatible 5 V ±10% operation, and 100-pin TQFP packaging with verified pin mapping.

Technical Context

The 7025L25PFI implements fully asynchronous dual-port architecture with on-chip port arbitration logic and hardware semaphore signaling-enabling deterministic contention resolution without external logic. Its BUSY flag generation (M/S = H for master output; M/S = L for slave input) and interrupt flag (INTL/INTR) provide real-time inter-processor coordination.

It supports byte-selectable writes (UBL/LBL), separate chip enable per port (CEL/CER), and output enable control (OEL/OER), allowing multiplexed bus compatibility and flexible memory mapping. The device operates in three power states: active (750 mW typ.), standby (1 mW typ. for L-version), and data retention (≤100 µA at VCC = 2 V).

Key Specifications

Pinout & Package

7025L25PFI is housed in a 100-pin TQFP (PNG100) package with exposed thermal pad. Pin functions are strictly segregated per port: left port (L) and right port (R) each have dedicated address (A0L–A12L / A0R–A12R), data I/O (I/O0L–I/O15L / I/O0R–I/O15R), control (CEL/CER, R/WL/R/WR, OEL/OER), and system signals (M/S, BUSYL/BUSYR, INTL/INTR, SEML/SEMR, UBL/UBR, LBL/LBR).

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362V-25AXI and IS61LV51216-25KLI, the 7025L25PFI uniquely delivers 5 V TTL compatibility, hardware semaphore support, and 2 V battery retention in a single industrial-grade package-reducing BOM count and qualification effort for safety-critical dual-CPU systems.

Availability

7025L25PFI is available at Aetrix Electronics and suitable for industrial motion controllers, avionics data acquisition units, and redundant power supply monitors requiring stable component supply across extended product lifecycles.

Supply support for 7025L25PFI 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 7025L25PFI belongs to IDT's legacy dual-port SRAM family, engineered for deterministic real-time inter-processor communication in industrial, military, and aerospace systems where hardware arbitration and data integrity are non-negotiable.

FAQ

What is the guaranteed maximum read cycle time for the 7025L25PFI?

The 7025L25PFI has a guaranteed maximum read cycle time (tRC) of 25 ns across its full industrial temperature range (–40°C to +85°C) and supply voltage (5.0 V ±10%). This specification is production-tested and applies to both ports under worst-case conditions, enabling reliable operation in 40 MHz synchronous control loops without timing margin concerns.

Does the 7025L25PFI support battery backup operation, and what is the minimum retention voltage?

Yes, the 7025L25PFI supports battery backup operation with guaranteed data retention at VCC = 2.0 V. Its low-power L-version draws ≤100 µA in retention mode (ICCDR), allowing years of data hold using a small coin-cell battery-critical for applications like UPS monitoring or flight data recorders where mains power may fail unexpectedly.

How does the Master/Slave (M/S) pin function in the 7025L25PFI?

When M/S = H, the 7025L25PFI operates as a master: BUSY is an output that asserts when port contention occurs. When M/S = L, it operates as a slave: BUSY becomes an input used to block writes until the master releases the resource. This pin enables daisy-chained arbitration across multiple 7025L25PFI devices without external logic.

Can the 7025L25PFI perform simultaneous reads from both ports to the same memory address?

Yes-the 7025L25PFI features true dual-port memory cells that allow fully asynchronous, simultaneous reads from both left and right ports to the exact same address location. No BUSY assertion or arbitration delay occurs in this mode, making it ideal for mirrored data access in lock-step processor architectures.

What package type and pin count does the 7025L25PFI use, and is thermal pad exposed?

The 7025L25PFI uses a 100-pin Thin Quad Flatpack (TQFP) package, designated PNG100, with dimensions 14 mm × 14 mm × 1.4 mm. It includes an exposed thermal pad on the underside for enhanced heat dissipation-requiring proper PCB land pattern and solder paste stencil design per IDT's AN-xxx thermal guidelines to maintain junction temperature within spec.