Renesas 70V25L15PFG8

Overview

70V25L15PFG8 from Integrated Device Technology (IDT) is a high-speed 4K x 16 true dual-port static RAM with independent left/right asynchronous ports, 15 ns read cycle time (commercial grade), 3.3 V single-supply operation, and integrated semaphore arbitration logic - used in real-time inter-processor communication, video frame buffers, and network packet buffering where simultaneous access to shared memory is required.

For engineers reviewing the 70V25L15PFG8 datasheet, 70V25L15PFG8 pinout, 70V25L15PFG8 application, or 70V25L15PFG8 equivalent, this page delivers verified electrical specs, TQFP-100 package mapping, industrial-grade timing behavior, and validated alternatives for dual-port SRAM migration and system-level coherency design.

Technical Context

The 70V25L15PFG8 implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port, enabling concurrent read/write operations to the same memory location without external arbitration. It supports master/slave cascading via M/S pin for 32-bit+ bus expansion and includes on-chip semaphore logic with eight dedicated flags addressed by A0–A2.

It operates at 3.3 V ±0.3 V across –40°C to +85°C (industrial grade), features LVTTL-compatible I/Os, and uses CMOS process technology to achieve 400 mW typical active power and 660 µW standby power. BUSY/INT signals are non-tri-stated push-pull outputs for deterministic handshake signaling.

Key Specifications

Pinout & Package

70V25L15PFG8 is housed in a 100-pin Thin Quad Flatpack (TQFP, package code PNG100), measuring 14 mm × 14 mm × 1.4 mm, with exposed pad not electrically connected. Pinout follows standard IDT70V25/24 dual-port layout: two full sets of address (A0L–A11L / A0R–A11R), data (I/O0L–I/O15L / I/O0R–I/O15R), and control (CEL/CER, OEL/OER, R/WL/R/WR, UBL/UBR, LBL/LBR, SEML/SEMR, INTL/INTR, BUSYL/BUSYR, M/S) signals - plus dedicated VDD (pins 12, 24, 49, 74, 87) and VSS (pins 13, 25, 50, 75, 88) rails.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV18-167BZI and AS7C34096A-15JCIN, the 70V25L15PFG8 uniquely delivers verified 15 ns dual-port timing with integrated semaphores and industrial temperature support in a compact 100-pin TQFP - making it optimal for deterministic real-time systems where concurrency, low latency, and reliability are non-negotiable.

Availability

70V25L15PFG8 is available at Aetrix Electronics and suitable for telecom infrastructure, industrial motion control, broadcast video processing, and automotive ADAS subsystems requiring stable component supply and long-term lifecycle assurance.

Supply support for 70V25L15PFG8 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 for communications, computing, and industrial markets.

The IDT70V25 family was designed specifically for deterministic, low-latency inter-processor communication in real-time embedded systems - emphasizing true dual-port concurrency, hardware semaphore support, and industrial-grade reliability.

FAQ

What is the maximum operating frequency supported by the 70V25L15PFG8?

The 70V25L15PFG8 supports a 15 ns read cycle time (tRC), corresponding to a maximum sustained operation frequency of approximately 67 MHz on either port. This rating applies under commercial conditions (0°C to +70°C); at industrial temperatures (–40°C to +85°C), timing remains compliant per datasheet AC specifications, with no derating required for 15 ns performance.

Does the 70V25L15PFG8 support true simultaneous read/write to the same memory address?

Yes, the 70V25L15PFG8 implements true dual-port SRAM cells that permit simultaneous reads from the same location on both ports. When both ports attempt a write to the same address, the on-chip arbitration logic uses the BUSY flag and M/S configuration to resolve contention - ensuring deterministic behavior without data corruption.

How many semaphore flags does the 70V25L15PFG8 provide, and how are they accessed?

The 70V25L15PFG8 provides eight hardware semaphore flags, addressed via A0–A2. Access is enabled by setting SEM = VIL while holding UB = LB = VIH (or CE = VIH), allowing atomic read-modify-write operations through I/O0 for lock acquisition and all I/O lines for flag status reads - essential for multi-processor synchronization.

Is the 70V25L15PFG8 pin-compatible with other members of the IDT70V25/24 family?

Yes, the 70V25L15PFG8 shares identical pinout and package (100-pin TQFP) with all IDT70V25/24 variants including 70V25S15PFG8 and 70V24L15PFG8. Differences are limited to internal speed grade (15 ns vs. 35/55 ns) and power optimization (L = low-power), enabling direct substitution in existing layouts without PCB changes.

What is the function of the M/S pin on the 70V25L15PFG8, and how does it affect BUSY behavior?

The M/S pin configures the 70V25L15PFG8 as Master (M/S = VIH) or Slave (M/S = VIL). In Master mode, BUSYL/BUSYR are outputs indicating local port contention; in Slave mode, they become inputs accepting BUSY signals from a Master device - enabling scalable multi-chip memory expansion with automatic arbitration.