Renesas 7025L15PFI

Overview

IDT7025L15PFI from Integrated Device Technology (IDT) is a high-speed 8K × 16 (128 Kbit) true dual-port static RAM with independent asynchronous left/right ports, 15 ns maximum read cycle time, industrial temperature range (–40°C to +85°C), and 1 µA typical standby current. It enables simultaneous read 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 IDT7025L15PFI datasheet, IDT7025L15PFI pinout, IDT7025L15PFI application, or IDT7025L15PFI equivalent, key selection considerations include BUSY-flag arbitration timing (tBAA ≤ 20 ns), semaphore-controlled inter-port synchronization, battery-backed 2V data retention, TTL-compatible 5V ±10% operation, and support for multiplexed bus byte-enable control via UBL/LBL.

Technical Context

The IDT7025L15PFI implements fully asynchronous dual-port architecture with on-chip port arbitration logic and hardware semaphore signaling across eight flags addressed by A0–A2. Its BUSY flag operates in master mode (M/S = H) as output or slave mode (M/S = L) as input to coordinate contention resolution between ports.

It features separate upper-byte (UBL/UBR) and lower-byte (LBL/LBR) controls for multiplexed bus compatibility, and supports interrupt flag generation (INTL/INTR) with programmable set/reset timing. The device uses CMOS high-performance fabrication for low active power (750 mW typ.) and ultra-low standby (1 mW typ. for L-version).

Key Specifications

Pinout & Package

Package: 84-pin Plastic Leaded Chip Carrier (PLCC), body size ≈ 1.12 in × 1.12 in × 0.16 in. Pin 1 corner marked with notch or dot; pin 1 located at top-left when notch faces up.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-15AC and R1EX24002AS0I-15, the IDT7025L15PFI uniquely integrates hardware semaphore logic, master/slave BUSY arbitration, and 2V battery retention - making it the only choice for safety-critical, low-latency inter-processor communication in industrial and avionics systems requiring zero-software-coordination memory sharing.

Availability

IDT7025L15PFI is available at Aetrix Electronics and suitable for motor control systems, industrial PLCs, avionics displays, and medical imaging equipment requiring stable component supply across extended product lifecycles.

Supply support for IDT7025L15PFI 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) was a fabless semiconductor company specializing in timing, memory interface, RF, and sensor solutions before its acquisition by Renesas Electronics in 2019.

The IDT7025L15PFI belongs to IDT's high-speed dual-port SRAM product line, designed specifically for real-time embedded systems requiring deterministic inter-processor communication, hardware arbitration, and industrial-grade reliability.

FAQ

What is the operating temperature range for IDT7025L15PFI?

IDT7025L15PFI is rated for industrial temperature operation from –40°C to +85°C. This specification is guaranteed across all AC and DC electrical parameters in the datasheet, including 15 ns maximum read cycle time and 1 µA typical standby current. The part is not qualified for commercial (0°C to +70°C) or military (–55°C to +125°C) grades.

Does IDT7025L15PFI support battery backup operation?

Yes, IDT7025L15PFI supports battery backup with data retention at VCC = 2.0 V. In this mode, typical data retention current is 100 µA (max 4000 µA over full military temperature range), and the device maintains stored data indefinitely as long as voltage remains ≥2.0 V. This feature is exclusive to the "L" (low-power) version and is not available in the "S" variant.

How does the BUSY flag function in IDT7025L15PFI?

In IDT7025L15PFI, the BUSY flag behavior depends on the M/S pin state: when M/S = HIGH, BUSYL/BUSYR act as outputs indicating port contention; when M/S = LOW, they serve as inputs to accept BUSY signals from a master device. This dual-mode design enables flexible master/slave cascading without external logic, with timing parameters like tBAA (≤20 ns) ensuring rapid arbitration response.

Can IDT7025L15PFI be used in a 32-bit data bus configuration?

Yes, IDT7025L15PFI supports 32-bit expansion via its Master/Slave select (M/S) functionality. Two devices can be cascaded - one configured as master (M/S = H), the other as slave (M/S = L) - to form a 8K × 32-bit memory with full-speed, error-free operation. No external logic is required, and both devices maintain synchronized arbitration using the BUSY signal path.

What is the purpose of the SEM pins in IDT7025L15PFI?

The SEML and SEMR pins in IDT7025L15PFI enable hardware semaphore register access. When SEM = LOW, the device interprets I/O0–I/O15 as semaphore flag data (addressed by A0–A2), allowing atomic read/write operations for inter-port synchronization. This eliminates software-based locking mechanisms and guarantees deterministic, race-free resource sharing between independent processors or DMA engines accessing the IDT7025L15PFI.