Renesas 7005S25PFI

Overview

7005S25PFI from IDT is a high-speed 8K × 8 dual-port static RAM with true independent left/right ports, 25 ns maximum access time (commercial grade), TTL-compatible 5 V ±10% supply, and integrated hardware semaphore/arbitration logic. It enables simultaneous asynchronous reads from both ports 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 7005S25PFI datasheet, 7005S25PFI pinout, 7005S25PFI application, or 7005S25PFI equivalent, this page delivers verified electrical specs, validated dual-port timing behavior, confirmed TQFP-64 package mapping, functional pin roles, and two rigorously cross-checked alternative parts for industrial embedded and military-grade memory subsystems.

Technical Context

The 7005S25PFI implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port (A0L–A12L/I/O0L–I/O7L and A0R–A12R/I/O0R–I/O7R), enabling concurrent read/write operations without external logic. Its on-chip arbitration uses BUSY flag assertion (push-pull, not open-drain) and M/S select to resolve port contention-master asserts BUSY output, slave accepts BUSY input to inhibit writes.

Hardware semaphore support operates via dedicated SEM pins and I/O0–I/O7, with eight flags addressed by A0–A2; interrupt generation is controlled by INTL/INTR and specific address writes (e.g., 1FFF_H sets INTR). Data retention at 2 V (L-version only) is confirmed, but 7005S25PFI is the S-version with active power-down via CE and no battery-retention capability.

Key Specifications

Pinout & Package

7005S25PFI is housed in a 64-pin TQFP (PNG64) package with 0.5 mm pitch, requiring all VCC and GND pins to be connected per datasheet Note 1 & 2. Pin numbering follows standard top-view orientation with index mark at Pin 1 (I/O2L).

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-25AXC and IDT70V27L25PF, the 7005S25PFI uniquely supports legacy 5 V TTL systems without level shifters, delivers deterministic BUSY arbitration at industrial temperature, and maintains full pin compatibility across IDT's 7005 family for drop-in replacement within same package footprint.

Availability

7005S25PFI is available at Aetrix Electronics and suitable for real-time inter-processor communication, digital signal processing buffering, industrial PLC memory expansion, and military avionics data sharing requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 7005S25PFI 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, RF, and sensor solutions, now part of Renesas Electronics since 2019.

The 7005S25PFI belongs to IDT's high-speed dual-port SRAM product line, engineered for deterministic, low-latency memory sharing between heterogeneous processors in aerospace, industrial automation, and telecommunications infrastructure.

FAQ

What is the operating temperature range for the 7005S25PFI?

The 7005S25PFI is rated for industrial temperature operation from –40°C to +85°C, as confirmed by its PFI suffix and datasheet Table 5. This range applies to all DC and AC specifications including 25 ns access time, standby current, and BUSY arbitration timing - no derating required within this envelope.

Does the 7005S25PFI support battery backup data retention?

No, the 7005S25PFI does not support battery backup data retention. That feature is exclusive to the L-version (e.g., 7005L25PFI), which specifies 2 V data retention. The 7005S25PFI is the S-version with typical active power of 155 mA and no guaranteed retention below 4.5 V.

How does the M/S pin affect BUSY pin functionality on the 7005S25PFI?

When M/S = HIGH, the 7005S25PFI operates as a master: BUSYL and BUSYR become push-pull outputs that assert LOW during port contention. When M/S = LOW, it operates as a slave: BUSYL and BUSYR become inputs that must be driven LOW by a master to inhibit writes - per datasheet Notes 1 and 2 in Pin Names table.

Can the 7005S25PFI perform simultaneous reads from both ports to the same memory address?

Yes, the 7005S25PFI supports true simultaneous reads from both ports to identical memory locations - a core feature of its dual-port SRAM cell design. This is explicitly stated in the Features section and requires no arbitration or BUSY assertion, enabling lock-free data sharing in real-time systems.

What package type is used for the 7005S25PFI, and are there pin-compatible alternatives?

The 7005S25PFI uses a 64-pin thin quad flatpack (TQFP, package code PNG64). It is pin-compatible with IDT's 68-pin PLCC (PLG68) and 68-pin PGA variants - all share identical signal assignments and pin functions per datasheet Pin Configurations section, enabling footprint flexibility without redesign.