Renesas 70V05L35PF8

Overview

70V05L35PF8 from IDT (now Renesas) is a high-speed 3.3V 8K × 8 dual-port static RAM with true independent left/right ports, 35 ns maximum access time, 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 in real-time control systems requiring deterministic arbitration.

For engineers reviewing the 70V05L35PF8 datasheet, 70V05L35PF8 pinout, 70V05L35PF8 application, or 70V05L35PF8 equivalent, key selection criteria include dual-port arbitration latency, BUSY/INT flag timing, semaphore coherency across ports, and compatibility with 3.3V TTL-level system buses in embedded controllers and communications processors.

Technical Context

The 70V05L35PF8 implements fully asynchronous dual-port operation with on-chip port arbitration logic and hardware semaphore support across eight flags. Its MASTER/SLAVE configuration uses the M/S pin to configure BUSY as output (master) or input (slave), enabling scalable multi-device 16-bit+ bus expansion without external logic.

It supports two distinct access modes: standard SRAM reads/writes (CE = VIL, SEM = VIH) and semaphore operations (CE = VIH, SEM = VIL), with separate timing parameters for each. Port-to-port contention resolution relies on address-match arbitration (tAPS) and BUSY assertion timing (tBAA, tBDA), not software polling.

Key Specifications

Pinout & Package

70V05L35PF8 is housed in a 64-pin thin quad flatpack (TQFP) package, PN64, with exposed thermal pad for enhanced heat dissipation in continuous-access applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C024AV-35AXC and AS7C38097A-35PCN, the 70V05L35PF8 uniquely delivers integrated semaphore registers, push-pull BUSY/INT flags, and MASTER/SLAVE cascading-reducing BOM count and firmware complexity in safety-critical real-time systems.

Availability

70V05L35PF8 is available at Aetrix Electronics and suitable for industrial motion controllers, FPGA co-processor buffers, and telecom line cards requiring stable component supply across extended product lifecycles.

Supply support for 70V05L35PF8 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, designs high-performance timing, memory, and interface solutions for communications, computing, and industrial markets.

The 70V05L35PF8 belongs to IDT's high-speed dual-port SRAM product line, engineered specifically for deterministic real-time systems where concurrent access, hardware arbitration, and low-latency inter-processor communication are essential.

FAQ

What is the maximum access time specification for the 70V05L35PF8?

The 70V05L35PF8 has a maximum access time (tAA) of 35 ns across the full industrial temperature range (–40°C to +85°C) and supply voltage (3.3 V ± 0.3 V). This value is guaranteed under worst-case conditions and defines the time from stable address and chip enable to valid data at the outputs. The 70V05L35PF8 achieves this performance using CMOS high-speed fabrication and optimized internal decode paths.

Does the 70V05L35PF8 support hardware semaphore functionality, and how is it accessed?

Yes, the 70V05L35PF8 includes full on-chip hardware semaphore logic supporting eight independent flags. These are accessed via the SEMx (SEML/SEMR) control pin combined with address lines A0–A2: when CE = VIH and SEM = VIL, the addressed semaphore flag is read or written through I/O0–I/O7. The 70V05L35PF8 uses this to provide atomic set/clear operations without CPU intervention, critical for RTOS task synchronization.

How does the MASTER/SLAVE configuration work on the 70V05L35PF8, and what is the role of the M/S pin?

The M/S pin on the 70V05L35PF8 configures BUSY signal behavior: when driven HIGH, the device operates as MASTER and asserts BUSYL/BUSYR as push-pull outputs during contention; when driven LOW, it operates as SLAVE and accepts BUSY signals as inputs to inhibit writes. This enables daisy-chained arbitration in multi-device 16-bit+ systems. The 70V05L35PF8 leverages this to scale memory width without external logic or timing penalties.

What are the power consumption characteristics of the 70V05L35PF8 in active and standby modes?

The 70V05L35PF8 draws 380 mW typical active power (IDD) at 3.3 V and 25°C, and only 660 μW typical standby power (ISB) when CE is deasserted. These values reflect its CMOS design and automatic power-down circuitry per port. In systems where one port remains idle, the 70V05L35PF8 reduces overall power by disabling unused I/O and decode logic-making it suitable for energy-constrained industrial and automotive applications.

Which package type is used for the 70V05L35PF8, and what are its mechanical dimensions?

The 70V05L35PF8 is packaged in a 64-pin thin quad flatpack (TQFP) designated PNG64, with body dimensions of 14 mm × 14 mm × 1.4 mm. It features an exposed thermal pad on the underside for improved heat dissipation during sustained high-speed operation. This package is RoHS-compliant and optimized for reflow soldering in high-volume manufacturing environments.