Renesas 70V05L15PFG8

Overview

70V05L15PFG8 from IDT (now Renesas) is a high-speed 3.3V 8K × 8 dual-port static RAM with true independent left/right ports, 15 ns maximum access time (commercial grade), 380 mW typical active power, and industrial temperature support (–40°C to +85°C). It enables simultaneous read/write access to the same memory location and is used in real-time inter-processor communication, video frame buffers, and network packet buffering.

For engineers reviewing the 70V05L15PFG8 datasheet, 70V05L15PFG8 pinout, 70V05L15PFG8 application, or 70V05L15PFG8 equivalent, key selection criteria include dual-port arbitration latency, BUSY/INT flag timing, semaphore coherency across ports, and compatibility with 3.3V TTL-level control logic in deterministic embedded systems.

Technical Context

The 70V05L15PFG8 implements fully asynchronous dual-port operation with on-chip port arbitration logic, hardware semaphore signaling (8 flags addressable via A0–A2), and MASTER/SLAVE configuration via the M/S pin. BUSY outputs are push-pull (not open-drain), and interrupt generation is edge-triggered on write-to-interrupt-address.

It supports contention resolution through address-match arbitration (tAPS timing), CE-controlled arbitration (tBAC/tBDC), and port-to-port delay handling (tDDD/tDDW), with all timing parameters specified over VDD = 3.3 V ± 0.3 V and full industrial temperature range.

Key Specifications

Pinout & Package

70V05L15PFG8 is housed in a 64-pin thin quad flatpack (TQFP, package code PNG64), with 32 pins per side. Power (VDD) and ground (VSS) pins are distributed across all four sides for low-impedance decoupling. I/Os are grouped by port (I/O0L–I/O7L on left, I/O0R–I/O7R on right), and control signals are duplicated per port (CEL/CER, OEL/OER, R/WL/R/WR).

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C024AV-15AXC and AS7C38098B-15JCIN, the 70V05L15PFG8 uniquely integrates hardware semaphore, MASTER/SLAVE expansion, and push-pull BUSY signaling - making it irreplaceable in deterministic multi-CPU systems requiring atomic resource sharing without external logic.

Availability

70V05L15PFG8 is available at Aetrix Electronics and suitable for industrial automation, motor control, and network infrastructure applications requiring stable component supply across extended product lifecycles.

Supply support for 70V05L15PFG8 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), now part of Renesas Electronics, is a semiconductor company specializing in timing, memory, and interface solutions for high-performance computing and communications.

The 70V05L15PFG8 belongs to IDT's legacy dual-port SRAM product line, designed specifically for deterministic, low-latency inter-processor communication in industrial, aerospace, and telecom equipment.

FAQ

What is the maximum operating frequency supported by the 70V05L15PFG8?

The 70V05L15PFG8 supports a maximum random read cycle rate of approximately 67 MHz, derived from its 15 ns access time (tAA) and 30 ns cycle time (tRC). This assumes proper setup/hold timing for address and control signals, and applies independently to each port under commercial temperature conditions. The actual sustained bandwidth depends on bus turnaround and arbitration overhead in multi-port configurations.

Does the 70V05L15PFG8 support true simultaneous read operations from both ports to the same memory address?

Yes, the 70V05L15PFG8 supports true simultaneous reads to the same memory location from both ports without contention or latency penalty. Its true dual-port cell architecture ensures independent access paths, and BUSY arbitration is inactive during concurrent reads - allowing deterministic, zero-cycle-overhead data sharing between processors.

How does the M/S pin affect BUSYL and BUSYR functionality in the 70V05L15PFG8?

When M/S = VIH, the 70V05L15PFG8 operates in MASTER mode: BUSYL and BUSYR are push-pull outputs reflecting local port arbitration status. When M/S = VIL, it operates in SLAVE mode: BUSYL and BUSYR become inputs that accept BUSY handshake signals from a MASTER device, disabling internal write arbitration and enabling cascaded multi-chip configurations.

Can the 70V05L15PFG8 be used in systems requiring -40°C to +85°C operation?

Yes, the 70V05L15PFG8 is explicitly rated for industrial temperature range (–40°C to +85°C) and characterized across this full range for all DC and AC parameters, including access time, power consumption, and BUSY/INT timing. Its 15 ns speed grade is guaranteed at +85°C, making it suitable for under-hood automotive modules and factory-floor controllers.

What is the role of the SEM pins in the 70V05L15PFG8, and how are semaphores accessed?

The SEML and SEMR pins enable hardware semaphore operations: when CE = VIH and SEM = VIL, the device enters semaphore mode and interprets A0–A2 as semaphore flag index (0–7). Data written to I/O0 sets the flag; reading I/O0–I/O7 returns the full 8-bit semaphore register. This provides atomic, lock-free resource coordination between ports without software intervention.