Renesas 70V27L25PFI/2703

Overview

IDT70V27L25PFI/2703 from Integrated Device Technology is a high-speed 3.3V 32K × 16 dual-port static RAM with true dual-ported memory cells enabling simultaneous access to the same address, 25ns maximum read cycle time (tRC), industrial temperature range (–40°C to +85°C), and 100-pin TQFP package. It serves as a stand-alone or master/slave-configured memory in real-time interprocessor communication systems.

For engineers reviewing the IDT70V27L25PFI/2703 datasheet, IDT70V27L25PFI/2703 pinout, IDT70V27L25PFI/2703 application, or IDT70V27L25PFI/2703 equivalent, key selection considerations include bus-matching byte control (UBL/LBL), on-chip semaphore arbitration, BUSY flag timing for port contention resolution, and low-power standby current of 660μW (typ.) in full CMOS standby mode.

Technical Context

The IDT70V27L25PFI/2703 implements fully asynchronous dual-port architecture with independent left/right address, control, and I/O buses - supporting concurrent read/write operations without external arbitration logic. Its on-chip port arbitration uses address-match and chip-enable timing to assert BUSY flags, with tBDD ≤ 35ns (M/S = VIH) ensuring deterministic resolution of memory contention.

It integrates full hardware semaphore signaling across eight flags addressed by A0–A2, accessible via I/O0 for write and all I/Os for read, with tSOP ≤ 15ns and tSPS = 5ns. The device supports MASTER/SLAVE cascading via M/S pin to expand data width beyond 16 bits while maintaining full-speed operation.

Key Specifications

Pinout & Package

Package: 100-pin TQFP (PN100-1), body size 14 mm × 14 mm × 1.4 mm, lead finish SnPb (EOL - last time buy expired 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-25AXC and R1EX24032AS0C-25, the IDT70V27L25PFI/2703 delivers tighter arbitration timing (tAPS = 5ns), lower standby current (660μA vs. ≥1.2mA), and native MASTER/SLAVE cascading - making it optimal for deterministic real-time interprocessor communication where hardware semaphore integrity is critical.

Availability

IDT70V27L25PFI/2703 is available at Aetrix Electronics and suitable for industrial PLCs, avionics data concentrators, real-time interprocessor communication links, and digital signal processing buffering systems requiring stable component supply and long-term lifecycle support.

Supply support for IDT70V27L25PFI/2703 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 signal conditioning ICs.

The IDT70V27L25PFI/2703 belongs to IDT's high-speed dual-port SRAM product line, designed specifically for deterministic, low-latency interprocessor communication in industrial automation, aerospace, and test equipment where hardware arbitration and sub-50ns timing predictability are mandatory.

FAQ

What is the maximum operating frequency supported by the IDT70V27L25PFI/2703?

The IDT70V27L25PFI/2703 supports a maximum read cycle time (tRC) of 25 ns, corresponding to a theoretical maximum operating frequency of 40 MHz per port under ideal conditions. This assumes proper setup/hold timing compliance, valid address/control transitions, and appropriate load conditions per the AC test specifications (e.g., 30 pF output load). Real-world system clock rates may be lower depending on PCB layout, drive strength, and signal integrity.

Does the IDT70V27L25PFI/2703 support both Master and Slave configurations?

Yes, the IDT70V27L25PFI/2703 supports both Master and Slave configurations via the M/S pin. When M/S = VIH, BUSYL and BUSYR function as push-pull outputs for arbitration signaling; when M/S = VIL, they become inputs that inhibit writes during contention. This enables flexible cascading in multi-device 32-bit+ memory systems without external logic.

How does the semaphore functionality work in the IDT70V27L25PFI/2703?

The IDT70V27L25PFI/2703 implements eight hardware semaphore flags addressed by A0–A2. To access them, SEM must be driven low while CE is high. Writing to I/O0 sets the flag; reading from any I/O pin (I/O0–I/O15) returns the flag value. Timing parameters tSOP ≤ 15 ns and tSPS = 5 ns ensure fast, deterministic flag updates and contention resolution between ports.

What is the standby current consumption of the IDT70V27L25PFI/2703 in full CMOS mode?

In full CMOS standby mode (ISB3), where both ports have all inputs at valid CMOS levels - i.e., CE0/CE1 > VDD – 0.2 V and SEM > VDD – 0.2 V - the IDT70V27L25PFI/2703 consumes 660 μA typical (3 mA max). This ultra-low quiescent current enables extended operation in battery-backed industrial controllers and portable test equipment.

Is the IDT70V27L25PFI/2703 pin-compatible with other members of the IDT70V27 family?

Yes, the IDT70V27L25PFI/2703 shares identical 100-pin TQFP pinout and electrical interface with all speed grades (e.g., IDT70V27L15, IDT70V27L20) and variants (IDT70V27S) in the IDT70V27 family. Speed grade differences affect only timing parameters (e.g., tRC, tAA) - not pin function, voltage levels, or logic behavior - allowing drop-in replacement within the same temperature grade.