Renesas 70V05L15PF

Overview

70V05L15PF from IDT 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 interprocessor communication systems requiring deterministic arbitration.

For engineers reviewing the 70V05L15PF datasheet, 70V05L15PF pinout, 70V05L15PF application, or 70V05L15PF equivalent, key selection considerations include BUSY/INT flag behavior, master/slave semaphore arbitration, port-to-port contention timing, and compatibility with 3.3V TTL-level control logic in embedded multiprocessor designs.

Technical Context

The 70V05L15PF implements fully asynchronous dual-port operation with on-chip arbitration logic, supporting both BUSY-flag-based and address-match-based contention resolution. Its M/S pin configures port roles: VIH enables BUSY output (Master), VIL enables BUSY input (Slave), enabling cascaded 16-bit+ bus expansion without external logic.

It integrates full hardware semaphore signaling across eight flags (addressed via A0–A2), interrupt generation on write-triggered flag changes, and automatic low-power standby when CE is deasserted. All I/Os are 3.3V TTL-compatible with push-pull BUSY/INT outputs and tri-state data buses controlled by OE/CE/R/W.

Key Specifications

Pinout & Package

70V05L15PF is housed in a 68-pin Plastic Leaded Chip Carrier (PLCC, package code PLG68), with 0.05-inch lead pitch and body dimensions ≈ 0.95 in × 0.95 in × 0.17 in. All VDD pins require local decoupling; all GND pins must be connected to system ground.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C024AV-15AXC and IDT70V25L15PF, the 70V05L15PF delivers optimal balance of integrated arbitration features, industrial temperature range, and proven field reliability in space-constrained 8-bit dual-processor systems-without over-specifying density or test infrastructure.

Availability

70V05L15PF is available at Aetrix Electronics and suitable for industrial PLC backplanes, real-time DSP co-processor interfaces, and avionics data concentrators requiring stable component supply and long-term obsolescence management.

Supply support for 70V05L15PF 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) is a fabless semiconductor company specializing in high-performance timing, memory, and interface solutions for communications, computing, and industrial markets.

The 70V05L15PF belongs to IDT's legacy dual-port SRAM product line, engineered specifically for deterministic interprocessor communication in safety-critical and real-time embedded systems.

FAQ

What is the maximum operating frequency supported by the 70V05L15PF?

The 70V05L15PF does not specify a clock frequency because it is an asynchronous SRAM. Its performance is defined by access time: 15 ns maximum tAA for commercial-grade operation. This translates to effective throughput up to ~66.7 MHz for consecutive read cycles under ideal conditions, but actual system speed depends on external control timing and bus protocol overhead-not an internal clock.

Does the 70V05L15PF support true simultaneous read operations from both ports to the same address?

Yes, the 70V05L15PF supports true simultaneous reads to the same memory location from both ports without contention or arbitration delay. This capability is enabled by its true dual-ported memory cell architecture, as confirmed in the datasheet Features section and Functional Block Diagram-no BUSY assertion or timing penalty occurs during concurrent reads.

How is semaphore functionality implemented in the 70V05L15PF?

Semaphore functionality in the 70V05L15PF is implemented via eight dedicated hardware flags addressed by A0–A2. When SEM = VIH, the device accesses memory; when SEM = VIL and CE = VIH, it accesses semaphores. Reads return flag state; writes set/clear flags atomically-eliminating race conditions without software intervention.

What is the role of the M/S pin on the 70V05L15PF, and how does it affect BUSY pin behavior?

The M/S pin configures the 70V05L15PF as Master (M/S = VIH) or Slave (M/S = VIL). In Master mode, BUSYL/BUSYR are push-pull outputs that assert during port contention. In Slave mode, they become inputs used to receive BUSY signals from a Master device-enabling hierarchical arbitration in multi-SRAM systems without external logic.

Can the 70V05L15PF operate reliably at 3.0V supply voltage?

Yes, the 70V05L15PF is specified for VDD = 3.3 V ± 0.3 V, meaning it operates reliably from 3.0 V to 3.6 V. DC Electrical Characteristics tables confirm valid operation at 3.0 V, including guaranteed 15 ns access time and correct logic thresholds (VIL ≤ 0.8 V, VIH ≥ 2.0 V) across the full industrial temperature range.