Renesas 70V27L25PFI8

Overview

IDT70V27L25PFI8 from Integrated Device Technology is a high-speed 3.3V 32K × 16 dual-port static RAM with true simultaneous access to the same memory location from independent left and right ports, 25ns maximum read cycle time (tRC), 500mW typical active power, and 660μW typical standby power. It supports full on-chip semaphore signaling and BUSY/INT flag arbitration for real-time multi-processor communication in industrial control systems.

For engineers reviewing the IDT70V27L25PFI8 datasheet, IDT70V27L25PFI8 pinout, IDT70V27L25PFI8 application, or IDT70V27L25PFI8 equivalent, key selection criteria include its 100-pin TQFP package, LVTTL-compatible 3.3V operation, industrial temperature range (−40°C to +85°C), and master/slave cascading capability for 32-bit+ bus expansion without external logic.

Technical Context

The IDT70V27L25PFI8 implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port, enabling concurrent read/write operations without contention detection logic. Its on-chip arbitration logic resolves port-to-port conflicts via BUSY flag assertion based on address match or chip enable timing, with tAPS = 5ns priority setup time.

It integrates dedicated semaphore registers (8 flags, addressed by A0–A2) accessible via CE = VIH / SEM = VIL mode, supporting atomic read-modify-write sequences across ports. The device uses CMOS high-performance fabrication and supports TTL- and CMOS-level input thresholds with VIL ≤ 0.8V and VIH ≥ 2.0V at VDD = 3.3V ± 0.3V.

Key Specifications

Pinout & Package

Package: 100-pin Thin Quad Flatpack (TQFP), body size 14 mm × 14 mm × 1.4 mm, lead finish SnPb (EOL as of June 15, 2018).

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-25AC and R1EX24032AS0C-25, IDT70V27L25PFI8 uniquely delivers industrial-grade reliability, integrated hardware semaphores, and true master/slave cascading - making it the only drop-in solution for deterministic real-time multi-processor systems requiring guaranteed arbitration and −40°C startup.

Availability

IDT70V27L25PFI8 is available at Aetrix Electronics and suitable for industrial PLCs, real-time multi-core communication systems, redundant controller failover architectures, and automated test equipment requiring stable component supply across extended product lifecycles.

Supply support for IDT70V27L25PFI8 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, and RF solutions for communications, computing, and industrial markets.

IDT70V27L25PFI8 belongs to the IDT70V27 family of high-speed dual-port SRAMs designed specifically for deterministic inter-processor communication in real-time embedded systems requiring hardware-enforced synchronization and low-latency memory sharing.

FAQ

What is the maximum operating speed of the IDT70V27L25PFI8?

The IDT70V27L25PFI8 has a maximum read cycle time (tRC) of 25 ns, corresponding to a theoretical maximum operating frequency of 40 MHz. This speed is guaranteed over the full industrial temperature range (−40°C to +85°C) and 3.3V ± 0.3V supply, with all AC parameters including tAA, tACE, and tAOE specified at 25 ns max under worst-case conditions.

Does the IDT70V27L25PFI8 support true simultaneous access to the same memory location?

Yes, the IDT70V27L25PFI8 implements true dual-ported memory cells that allow independent, asynchronous read or write operations to the exact same memory address from left and right ports. When contention occurs, on-chip arbitration logic asserts BUSY to block the later-accessing port, ensuring data integrity without external logic.

How does the semaphore function work on the IDT70V27L25PFI8?

The IDT70V27L25PFI8 provides eight hardware semaphore flags accessed via A0–A2 address lines when CE = VIH and SEM = VIL. Each flag can be atomically written via I/O0 and read across all 16 I/O pins, enabling lock-free resource management between processors. The tSOP pulse width is 15 ns min, ensuring fast synchronization.

What is the power consumption profile of the IDT70V27L25PFI8 in standby mode?

In full standby mode (ISB3), with both ports disabled using CMOS-level inputs (CE > VDD − 0.2V), the IDT70V27L25PFI8 consumes only 0.2 mA typical - equivalent to 660 μW at 3.3V. This ultra-low quiescent current enables energy-efficient operation in battery-backed or thermally constrained industrial systems.

Can multiple IDT70V27L25PFI8 devices be cascaded for wider data buses?

Yes, the IDT70V27L25PFI8 supports master/slave cascading via the M/S pin: set M/S = VIH for BUSY output (Master) or M/S = VIL for BUSY input (Slave). This allows seamless expansion to 32-bit or wider data paths using multiple devices without external glue logic, maintaining full-speed operation.