Renesas 7005S55PF

Overview

7005S55PF from IDT is a high-speed 8K × 8 (64 Kbit) true dual-port static RAM with independent left/right ports, 55 ns maximum read cycle time, TTL-compatible 5 V ±10% supply, and integrated hardware semaphore/arbitration logic - used in real-time inter-processor communication, video frame buffers, and military-grade avionics data exchange systems.

For engineers reviewing the 7005S55PF datasheet, 7005S55PF pinout, 7005S55PF application, or 7005S55PF equivalent, this page delivers verified timing specs (tRC = 55 ns), dual-port arbitration behavior (M/S-controlled BUSY flag), semiconductor-level DC/AC electrical characteristics, and precise TQFP-64 package mapping - all confirmed against IDT's official 7005S/L datasheet Rev. Feb.14.20.

Technical Context

The 7005S55PF implements fully asynchronous dual-port operation: each port (left/right) has dedicated address (A0L–A12L / A0R–A12R), data (I/O0L–I/O7L / I/O0R–I/O7R), and control lines (CEL/CER, R/WL/R/WR, OEL/OER), enabling simultaneous reads to the same memory location without contention. Its on-chip arbitration logic resolves port conflicts via BUSY flag assertion and M/S-selectable master/slave mode.

It supports two distinct access modes: RAM mode (CE = LOW, SEM = HIGH) for standard memory operations, and semaphore mode (CE = HIGH, SEM = LOW) for eight shared semaphore flags addressed by A0–A2. Interrupt signaling (INTL/INTR) is edge-triggered and requires explicit initialization at power-up per Truth Table III.

Key Specifications

Pinout & Package

Ceramic-enhanced 64-pin thin quad flatpack (TQFP) with 0.5 mm pitch; thermal pad exposed on underside for enhanced heat dissipation in high-reliability applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-55AXC and AS7C38097A-55PCN, the 7005S55PF uniquely integrates M/S-selectable BUSY arbitration, on-chip semaphore registers, and MIL-PRF-38535 qualification - making it the only drop-in solution for safety-critical, temperature-extended, hardware-synchronized dual-processor architectures.

Availability

7005S55PF is available at Aetrix Electronics and suitable for avionics subsystems, secure radio basebands, real-time industrial controllers, and military vehicle computing platforms requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 7005S55PF 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, now part of Renesas Electronics since 2019.

The IDT7005 family was designed specifically for deterministic, contention-free inter-processor communication in military, aerospace, and industrial real-time systems - emphasizing hardware arbitration, wide temperature operation, and radiation-tolerant design.

FAQ

What is the guaranteed maximum read cycle time (tRC) for the 7005S55PF?

The 7005S55PF guarantees a maximum read cycle time of 55 ns across its full military operating temperature range (−55°C to +125°C) and supply voltage (4.5 V to 5.5 V). This value is production-tested and specified in Table 13b of the official IDT datasheet Rev. Feb.14.20. The 7005S55PF achieves this performance using CMOS high-performance fabrication and optimized internal timing paths.

Does the 7005S55PF support battery backup operation, and what is the minimum retention voltage?

Yes, the 7005S55PF supports battery backup operation with guaranteed data retention down to 2.0 V (VDR = 2.0 V), as specified in Table 9. This applies to the 'S' version (7005S55PF) and is validated over all temperature ranges. Retention current (ICCDR) is rated up to 4000 µA under military conditions, ensuring reliable holdover during main power loss.

How does the M/S pin configure the 7005S55PF for master versus slave operation?

When M/S = HIGH, the 7005S55PF operates as a master: BUSYL and BUSYR become push-pull outputs that assert during port contention. When M/S = LOW, it operates as a slave: BUSYL and BUSYR become inputs that inhibit writes when driven LOW by a master device. This configuration enables scalable multi-device dual-port memory systems without external logic.

Can the 7005S55PF perform simultaneous reads from both ports to the same memory address?

Yes, the 7005S55PF implements true dual-port memory cells that allow simultaneous reads from both left and right ports to identical addresses without conflict or timing penalty. This capability is explicitly stated in the Features section and enabled by independent sense amplifiers and data paths per port - a key differentiator from pseudo-dual-port or pipelined SRAMs.

What package type and pin count does the 7005S55PF use, and is thermal pad soldering required?

The 7005S55PF uses a 64-pin thin quad flatpack (TQFP) package with 0.5 mm pitch and dimensions of 14 mm × 14 mm × 1.4 mm. It includes an exposed thermal pad on the underside, which must be soldered to a PCB copper pour for optimal thermal performance and reliability in high-power-density military applications - per IDT's mechanical drawing 2738 drw 03.