Renesas 70V06L35PF

Overview

70V06L35PF from IDT is a high-speed 3.3V 16K × 8 true dual-port static RAM with independent left/right ports, 35 ns read cycle time (max), industrial temperature range (–40°C to +85°C), and full on-chip semaphore and interrupt logic for inter-processor communication in real-time embedded systems.

For engineers reviewing the 70V06L35PF datasheet, 70V06L35PF pinout, 70V06L35PF application, or 70V06L35PF equivalent, this device supports simultaneous asynchronous access to shared memory, hardware arbitration via BUSY flags, master/slave cascading for 16-bit+ data buses, and battery-backed 2V data retention-critical for telecom switching, motor control, and FPGA co-processing designs.

Technical Context

The 70V06L35PF implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port. It integrates dedicated port arbitration logic that asserts BUSYL/BUSYR outputs when address contention occurs, with tBAA ≤ 20 ns and tBDD ≤ 35 ns timing guarantees under M/S = VIH configuration.

It supports three concurrent functional modes: standard SRAM access (CE = VIL, SEM = VIH), semaphore flag operations (CE = VIH, SEM = VIL), and interrupt signaling using fixed mailbox addresses (3FFE_H and 3FFF_H), all operating at 3.3V ±0.3V with TTL-compatible logic levels.

Key Specifications

Pinout & Package

70V06L35PF is packaged in a 68-pin PLCC (PLG68) with 0.05-inch lead pitch, body size ≈ 1.18 in × 1.18 in × 0.16 in, and requires all VDD pins connected to 3.3 V and all VSS pins grounded.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C024AV-35AXC and AS7C3256A-35JCIN, the 70V06L35PF uniquely delivers integrated semaphore, interrupt, and BUSY arbitration in a 16K × 8 footprint-reducing BOM count and eliminating timing-critical external logic for tightly coupled processor pairs.

Availability

70V06L35PF is available at Aetrix Electronics and suitable for telecom switching, industrial motor control, and avionics data acquisition requiring stable component supply across extended product lifecycles.

Supply support for 70V06L35PF 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 70V06L35PF belongs to IDT's legacy dual-port SRAM product line, designed specifically for deterministic inter-processor communication in real-time embedded systems where hardware arbitration and low-latency shared memory access are essential.

FAQ

What is the maximum operating frequency supported by the 70V06L35PF?

The 70V06L35PF does not specify a clock frequency because it is an asynchronous SRAM. Its performance is defined by timing parameters: tRC = 35 ns max read cycle time implies effective throughput up to ~28.6 MHz for consecutive reads. Actual system bandwidth depends on address/control setup/hold times and bus turnaround overhead-not a fixed clock rate. The 70V06L35PF operates fully asynchronously from either port without requiring external clocks.

Does the 70V06L35PF support battery backup operation?

Yes, the 70V06L35PF supports battery backup operation with guaranteed data retention down to 2 V supply voltage. When main VDD drops below operational threshold, applying ≥2 V to VDD (with VSS grounded) preserves stored data indefinitely. This feature is explicitly characterized and tested per datasheet Section "Battery backup operation-2V data retention", making the 70V06L35PF suitable for systems requiring nonvolatile memory persistence during power failure.

How does the M/S pin affect BUSY signal behavior on the 70V06L35PF?

When M/S = VIH, the 70V06L35PF operates as Master: BUSYL and BUSYR are push-pull outputs asserting LOW during address contention. When M/S = VIL, it operates as Slave: BUSYL and BUSYR become inputs, and external BUSY signals from a Master device must be applied to enable write inhibition. This dual-mode configuration allows flexible master/slave cascading-critical for building wider memory systems without external arbitration logic in the 70V06L35PF design.

Can the 70V06L35PF perform simultaneous reads and writes to different memory locations?

Yes, the 70V06L35PF supports fully independent asynchronous access: the left port can read location 0x1234 while the right port writes to location 0x5678 concurrently, with no timing restrictions or arbitration delay. This capability stems from its true dual-port cell architecture-each port has dedicated sense amplifiers and write drivers. Simultaneous access to *different* addresses imposes no BUSY assertion or performance penalty, unlike same-address contention which triggers hardware arbitration in the 70V06L35PF.

What are the valid interrupt mailbox addresses for the 70V06L35PF?

The 70V06L35PF uses fixed interrupt mailbox addresses: left port interrupt flag (INTL) is set when the right port writes to address 3FFE_H, and cleared when the left port reads that same address; right port interrupt flag (INTR) is set when the left port writes to 3FFF_H, and cleared when the right port reads it. These addresses are hardwired in silicon and cannot be remapped-the 70V06L35PF datasheet confirms this in Truth Table III and Functional Description sections.