Renesas 7005S25PF8

Overview

7005S25PF8 from IDT is a high-speed 8K × 8 dual-port static RAM with true simultaneous read access on independent left/right ports, 25 ns max read cycle time (tRC), TTL-compatible 5V ±10% supply, and integrated hardware semaphore/arbitration logic - used in real-time interprocessor communication systems requiring deterministic memory coherency.

For engineers reviewing the 7005S25PF8 datasheet, 7005S25PF8 pinout, 7005S25PF8 application, or 7005S25PF8 equivalent, this page delivers verified package mapping (64-pin TQFP), confirmed dual-port arbitration timing (tAPS = 5 ns), battery-backed data retention (2V, 100–4000 µA), and exact functional alternatives for master/slave memory expansion in embedded control and military-grade avionics.

Technical Context

The 7005S25PF8 implements fully asynchronous dual-port architecture with separate address/data/control buses per port (A0L–A12L/I/O0L–I/O7L/R/WL/CEL/OEL and A0R–A12R/I/O0R–I/O7R/R/WR/CER/OER), enabling concurrent reads/writes to distinct addresses without contention. Its on-chip arbitration logic resolves port conflicts via BUSY flag assertion (tBAA ≤ 20 ns) and priority setup (tAPS = 5 ns).

It supports two operational modes: standalone 64K-bit dual-port RAM or cascaded MASTER/SLAVE configuration using M/S pin for BUSY output (master) or input (slave); semaphore flags (8 total) are accessed via A0–A2 and I/O0–I/O7 with tSOP = 10 ns pulse width and tSWRD = 5 ns write-to-read latency.

Key Specifications

Pinout & Package

64-pin TQFP (PNG64) package with 0.5 mm pitch; body dimensions 14 mm × 14 mm × 1.4 mm; requires all VCC pins connected to 5V supply and all GND pins tied to ground plane.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C133-25JC and AS7C38099B-25JC, the 7005S25PF8 uniquely integrates arbitration, semaphore, and interrupt logic - reducing BOM count by up to 3 discrete ICs in safety-critical dual-CPU designs.

Availability

7005S25PF8 is available at Aetrix Electronics and suitable for real-time interprocessor communication, avionics data exchange, and industrial PLC memory expansion requiring stable component supply across commercial temperature ranges.

Supply support for 7005S25PF8 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, and interface solutions for communications, computing, and industrial markets.

The IDT7005 product line delivers true dual-port SRAMs with on-chip arbitration and semaphore logic - engineered for deterministic, low-latency memory sharing between heterogeneous processors in mission-critical systems.

FAQ

What is the maximum operating frequency supported by the 7005S25PF8?

The 7005S25PF8 supports a maximum read cycle time (tRC) of 25 ns, corresponding to a theoretical maximum operating frequency of 40 MHz. This assumes full address and control setup/hold timing compliance per AC Electrical Characteristics Table 13a; actual system frequency depends on board layout, load capacitance, and voltage stability.

Does the 7005S25PF8 support battery backup operation?

Yes, the 7005S25PF8 supports battery backup operation with data retention down to 2 V (VDR), drawing 100–4000 µA depending on temperature grade. This allows sustained memory state during main power loss - critical for avionics black-box recorders and industrial UPS systems.

How does the M/S pin affect BUSY signal behavior in the 7005S25PF8?

When M/S = H, the 7005S25PF8 operates as master: BUSYL and BUSYR are push-pull outputs asserting contention status. When M/S = L, it operates as slave: BUSYL and BUSYR become inputs that inhibit writes when driven low by a master device - enabling hierarchical multi-device memory expansion.

Can the 7005S25PF8 perform simultaneous reads from both ports to the same memory address?

Yes, the 7005S25PF8 features true dual-port memory cells that allow simultaneous reads from both left and right ports to identical addresses without conflict or performance penalty - a key differentiator from pseudo-dual-port or pipelined SRAM architectures.

What is the purpose of the semaphore function in the 7005S25PF8?

The semaphore function in the 7005S25PF8 provides eight hardware-managed flags accessible via A0–A2 and I/O0–I/O7, enabling atomic resource locking between processors. With tSOP = 10 ns pulse width and tSWRD = 5 ns write-to-read latency, it eliminates software-based spinlocks in real-time OS environments.