Renesas 70V06S35PF

Overview

70V06S35PF 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, TTL-compatible I/O, and full on-chip semaphore and interrupt logic for inter-processor communication in real-time embedded systems.

For engineers reviewing the 70V06S35PF datasheet, 70V06S35PF pinout, 70V06S35PF application, or 70V06S35PF equivalent, key selection criteria include bus arbitration timing (tAPS = 5 ns), BUSY flag response (tBAA ≤ 20 ns), low-power standby current (ISB3 = 0.2 mA typ.), and 68-pin PLCC package compatibility with legacy dual-port memory designs.

Technical Context

The 70V06S35PF implements fully asynchronous dual-port operation with separate address, control, and data buses per port, enabling simultaneous non-contention reads of the same memory location. Its on-chip arbitration logic resolves port conflicts via BUSY flag assertion with tBDD ≤ 35 ns disable-to-valid-data delay.

It supports MASTER/SLAVE cascading using the M/S pin to expand data width beyond 8 bits, and integrates dedicated semaphore registers (A0–A2 addressed) with tSOP = 15 ns update pulse width and tSPS = 5 ns contention window for deterministic resource locking between processors.

Key Specifications

Pinout & Package

70V06S35PF is packaged in a 68-pin Plastic Leaded Chip Carrier (PLCC), body size ≈ 24.1 mm × 24.1 mm × 4.3 mm, with gull-wing leads and internal heat slug. All VDD pins require decoupling; all VSS pins must be grounded.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-35AXC and IDT70V25L25PF, the 70V06S35PF offers optimal balance of 8-bit bus alignment, proven 68-pin PLCC compatibility, and full on-chip arbitration-making it ideal for cost-sensitive, space-constrained upgrades of legacy dual-port memory designs.

Availability

70V06S35PF is available at Aetrix Electronics and suitable for industrial PLC communication bridges, telecom line card data exchange, and avionics sensor fusion hubs requiring stable component supply and long-term obsolescence management.

Supply support for 70V06S35PF 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 timing, memory interface, and RF solutions for communications, computing, and industrial markets.

The IDT70V06 family was designed specifically for deterministic inter-processor communication in real-time embedded systems, integrating hardware arbitration, semaphore, and interrupt logic to eliminate software overhead in multi-CPU architectures.

FAQ

What is the maximum operating frequency supported by the 70V06S35PF?

The 70V06S35PF supports a maximum sustained read cycle rate of 28.6 MHz, derived from its 35 ns read cycle time (tRC). This timing applies under commercial temperature conditions (0°C to +70°C) with VDD = 3.3 V ± 0.3 V and proper load conditions per the AC test setup. The 70V06S35PF does not specify a clock input; operation is fully asynchronous and governed by control signal timing margins.

Does the 70V06S35PF support battery backup operation?

Yes, the 70V06S35PF supports battery backup operation with 2 V data retention capability. When VDD drops below 2 V while CE remains asserted, the device maintains stored data in static RAM cells. This feature enables use in systems requiring non-volatile state preservation during main power loss, such as industrial controllers and telecom equipment with backup batteries.

How does the M/S pin affect BUSY signal behavior in the 70V06S35PF?

In the 70V06S35PF, the M/S pin configures BUSY functionality: when M/S = VIH, BUSYL and BUSYR are push-pull outputs indicating port contention; when M/S = VIL, they become inputs that inhibit writes on the slave port. This enables master/slave cascading for 16-bit-or-wider memory systems without external logic, and the 70V06S35PF's tWB = 0 ns ensures immediate write inhibition upon BUSY assertion.

Can the 70V06S35PF be used in industrial temperature applications?

No, the 70V06S35PF is rated for commercial temperature range only (0°C to +70°C). For industrial applications (-40°C to +85°C), the 70V06L variant (e.g., 70V06L20PF) must be selected. The 'S' suffix in 70V06S35PF denotes commercial-grade speed/power rating, and its AC/DC specifications are validated only within the commercial temperature envelope.

What are the valid address ranges for interrupt mailbox functionality in the 70V06S35PF?

The 70V06S35PF uses fixed addresses for interrupt mailbox operation: writing to address 3FFE (HEX) sets the left port interrupt flag (INTL), and writing to 3FFF (HEX) sets the right port flag (INTR). Reading those same addresses clears the respective flags. These locations reside within the standard 16K address space and are functionally reserved for interrupt signaling when the feature is enabled.