Renesas 70V06S55PF8

Overview

70V06S55PF8 from IDT (Integrated Device Technology) is a high-speed 3.3V 16K × 8 dual-port static RAM with true independent left/right ports, 55 ns read cycle time, TTL-compatible I/O, and on-chip semaphore and interrupt logic - used in real-time inter-processor communication systems requiring concurrent memory access without arbitration overhead.

For engineers reviewing the 70V06S55PF8 datasheet, 70V06S55PF8 pinout, 70V06S55PF8 application, or 70V06S55PF8 equivalent, this page delivers verified timing specs, master/slave port arbitration behavior, BUSY/INT signal timing, semiconductor-grade DC/AC electrical characteristics, and confirmed TQFP-64 package mapping - all validated against IDT's official 70V06L datasheet revision Feb.07.20.

Technical Context

The 70V06S55PF8 implements fully asynchronous dual-port architecture with separate address, control, and bidirectional data buses per port. It supports simultaneous reads of identical memory locations and uses hardware-based port arbitration via BUSYL/BUSYR flags triggered by address contention or CE timing overlap.

Its semaphore logic operates across eight dedicated flags addressed by A0–A2, accessed only when SEM = VIL and CE = VIH, while interrupt signaling uses fixed mailbox addresses (3FFE_H for INTL, 3FFF_H for INTR) with edge-triggered flag set/clear behavior independent of data value.

Key Specifications

Pinout & Package

70V06S55PF8 is packaged in a 64-pin thin quad flatpack (TQFP), designated PNG64, with 0.5 mm pitch and exposed thermal pad. All VDD pins require decoupling; all VSS pins must be solidly grounded per IDT layout guidelines.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-55AXC and AS7C316000B-55PCN, the 70V06S55PF8 delivers native 8-bit dual-port operation in a compact 64-pin TQFP with built-in arbitration - reducing component count, board area, and firmware complexity for real-time embedded inter-processor communication.

Availability

70V06S55PF8 is available at Aetrix Electronics and suitable for industrial PLC backplanes, telecom line cards, medical imaging subsystems, and avionics display interfaces requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for 70V06S55PF8 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 memory, timing, RF, and interface solutions - acquired by Renesas Electronics in 2019 to strengthen embedded infrastructure portfolios.

The 70V06S55PF8 belongs to IDT's legacy dual-port SRAM product line, engineered specifically for deterministic real-time inter-processor communication in industrial, telecom, and medical systems where hardware arbitration and low-latency memory sharing are critical.

FAQ

What is the maximum operating frequency supported by the 70V06S55PF8?

The 70V06S55PF8 does not operate at a fixed clock frequency - it is an asynchronous SRAM. Its performance is defined by timing parameters: 55 ns read cycle time (tRC) and 55 ns address access time (tAA). These values establish the fastest achievable read rate - approximately 18.2 MHz sustained random-access throughput per port - assuming ideal bus loading and layout.

Does the 70V06S55PF8 support battery backup operation?

Yes, the 70V06S55PF8 supports battery backup operation with 2 V data retention voltage. When VDD drops below 2.0 V while CE remains asserted, the device maintains stored data without corruption - enabling graceful shutdown in systems with supercapacitor or coin-cell backup circuits.

How does the M/S pin affect BUSY signal behavior on the 70V06S55PF8?

When M/S = VIH, the 70V06S55PF8 operates as a master: BUSYL and BUSYR are push-pull outputs that assert low during address contention. When M/S = VIL, it operates as a slave: BUSYL and BUSYR become inputs, and external BUSY signals from a master device control write enable - allowing daisy-chained multi-device 16-bit+ memory expansion.

Can the 70V06S55PF8 perform simultaneous read and write to the same memory address?

No - the 70V06S55PF8 prohibits simultaneous write-to-same-address via hardware BUSY arbitration. If both ports attempt a write to identical A0–A13 addresses, BUSYL/BUSYR activate to block the later-arriving write. However, simultaneous reads to the same address are fully supported and return identical data without conflict.

What are the valid interrupt mailbox addresses for the 70V06S55PF8?

The 70V06S55PF8 uses fixed interrupt mailbox addresses: writing any value to address 3FFE_H (16382_dec) asserts the left port interrupt flag (INTL), and writing to 3FFF_H (16383_dec) asserts the right port flag (INTR). Reading those same addresses clears the respective flags - no additional control registers are required.