Renesas 70V06S25PF

Overview

70V06S25PF from IDT is a high-speed 3.3V 16K × 8 dual-port static RAM with true independent left/right ports, 25 ns max read cycle time (tRC), TTL-compatible I/O, and on-chip semaphore/interrupt arbitration logic. It enables simultaneous asynchronous access to the same memory location and supports master/slave cascading for 16-bit+ data bus expansion in real-time inter-processor communication systems.

For engineers reviewing the 70V06S25PF datasheet, 70V06S25PF pinout, 70V06S25PF application, or 70V06S25PF equivalent, key selection criteria include dual-port arbitration timing (tBAA ≤ 20 ns), low-power standby current (ISB3 = 0.2 mA typ.), 3.3V ±0.3V single-supply operation, and PLCC-68 package compatibility with industrial temperature range support.

Technical Context

The 70V06S25PF implements fully asynchronous dual-port architecture with separate address, control, and bidirectional I/O buses per port. Its on-chip arbitration logic resolves contention via BUSY flag assertion (M/S = VIH) or BUSY input (M/S = VIL), with tAPS = 5 ns priority setup time and tBDD ≤ 30 ns disable-to-valid-data delay.

It integrates full hardware semaphore signaling across eight flags (addressed by A0–A2), interrupt flag generation (INTL/INTR) triggered by writes to dedicated mailbox addresses (3FFE/3FFF), and automatic power-down per port via CE-driven ISB3 = 0.2 mA (typ.) full-standby mode at CMOS-level inputs.

Key Specifications

Pinout & Package

68-pin Plastic Leaded Chip Carrier (PLCC, package code PLG68), body size ≈ 0.95 in × 0.95 in × 0.17 in. All VDD pins require connection to 3.3 V supply; 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 CY7C024AV-25AXC and IDT70V25S25PF, the 70V06S25PF offers optimal balance of compact PLCC-68 footprint, master/slave expandability, and industrial temperature qualification - making it preferred for space-constrained, multi-CPU embedded systems where bus width flexibility and cascading simplicity are critical.

Availability

70V06S25PF is available at Aetrix Electronics and suitable for real-time industrial PLCs, avionics data concentrators, medical imaging controllers, and automated test equipment requiring stable component supply with long-term industrial temperature support.

Supply support for 70V06S25PF 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 70V06S25PF belongs to IDT's legacy dual-port SRAM product line, designed specifically for deterministic inter-processor communication in hard real-time embedded systems requiring hardware arbitration and low-latency memory access.

FAQ

What is the maximum operating frequency supported by the 70V06S25PF?

The 70V06S25PF does not specify a clock frequency; it is an asynchronous SRAM. Its performance is defined by timing parameters such as tRC = 25 ns max, enabling effective operation up to 40 MHz in read-cycle-limited systems. Actual throughput depends on system-level address/control setup and hold timing margins, not a fixed clock domain. The 70V06S25PF achieves this with no internal clock required.

Does the 70V06S25PF support battery backup operation?

Yes, the 70V06S25PF supports battery backup operation with data retention down to 2 V VDD. This allows the device to maintain stored memory contents during main power loss or brown-out conditions, provided backup voltage remains ≥2 V and all other supply pins meet specification. The 70V06S25PF retains data without refresh, leveraging static RAM cell architecture.

How does the M/S pin affect BUSY signal behavior in the 70V06S25PF?

When M/S = VIH, the 70V06S25PF operates as a master: BUSYL and BUSYR are push-pull outputs that assert low during same-address contention. When M/S = VIL, it operates as a slave: BUSYL and BUSYR become inputs that inhibit writes when driven low by a master device. This enables hierarchical arbitration in multi-device configurations without external logic.

Can the 70V06S25PF be used in a single-port configuration?

Yes, the 70V06S25PF can operate in single-port mode by tying one port's CE high (e.g., CER = VIH) and using only the other port's address, control, and I/O signals. In this mode, the disabled port enters ISB1 standby (≤30 mA typ.), and all dual-port features (BUSY, semaphore, interrupt) remain functional only for the active port's operations.

What are the valid interrupt mailbox addresses for the 70V06S25PF?

The 70V06S25PF uses fixed interrupt mailbox addresses: writing to address 3FFE (hex) sets the left-port interrupt flag (INTL), and writing to address 3FFF (hex) sets the right-port interrupt flag (INTR). Reading those same addresses clears the respective flags. These locations function as standard RAM when interrupts are unused, preserving full 16K × 8 memory capacity.