Renesas 7005S17PFI8

Overview

7005S17PFI8 from IDT is a high-speed 8K × 8 (64 Kbit) true dual-port static RAM with independent left/right ports, 17 ns maximum access time (commercial grade), TTL-compatible 5 V ±10% supply, and integrated hardware semaphore and interrupt logic for inter-processor communication in real-time embedded systems.

For engineers reviewing the 7005S17PFI8 datasheet, 7005S17PFI8 pinout, 7005S17PFI8 application, or 7005S17PFI8 equivalent, this device supports simultaneous asynchronous reads/writes across ports, on-chip arbitration, battery-backed data retention down to 2 V, and industrial-grade operation in 64-pin TQFP packaging - critical for deterministic multi-CPU memory sharing.

Technical Context

The 7005S17PFI8 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 access without external logic. Its on-chip arbitration uses BUSY flag signaling (push-pull, not open-drain) and Master/Slave select (M/S) to resolve port contention at the hardware level.

It integrates dedicated semaphore registers (8 flags, addressed via A0–A2) and interrupt flag logic (INTL/INTR), both accessible via standard read/write cycles with defined timing (tSOP = 10 ns, tSWRD = 5 ns). The device supports data retention at 2 V (IDT7005L variant behavior confirmed for S/L family), and operates across commercial temperature range (0°C to +70°C) as indicated by the 'C' suffix in package code PFI8.

Key Specifications

Pinout & Package

64-pin TQFP (PNG64) package with 0.5 mm pitch, 14 mm × 14 mm footprint, and 1.4 mm height. Pin 1 marked via corner notch; top-view orientation per IDT drawing 2738 drw 03.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C024AV-15AXC and AS7C38098B-15TCN, the 7005S17PFI8 delivers unique hardware-accelerated inter-processor coordination - reducing BOM count, PCB area, and firmware complexity in tightly coupled dual-CPU architectures.

Availability

7005S17PFI8 is available at Aetrix Electronics and suitable for industrial automation, avionics data exchange, medical imaging buffers, and telecom baseband interfaces requiring stable component supply, long-term lifecycle support, and guaranteed commercial-grade timing performance.

Supply support for 7005S17PFI8 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, low-latency inter-processor communication in real-time embedded systems - emphasizing hardware arbitration, semaphore support, and dual-port accessibility without external logic.

FAQ

What is the maximum operating temperature range for the 7005S17PFI8?

The 7005S17PFI8 is rated for commercial temperature operation from 0°C to +70°C, as confirmed by the 'C' suffix in its PFI8 package code. It does not support industrial (–40°C to +85°C) or military ranges - those require variants like 7005S20PGI or 7005S20MQI.

Does the 7005S17PFI8 support battery backup operation?

Yes, the 7005S17PFI8 supports data retention at VCC = 2 V, enabling battery backup functionality. This is a family-level feature shared with the IDT7005L series; the 'S' suffix denotes standard power (not low-power), but retention capability remains intact per datasheet Table 9.

How does the BUSY arbitration work between ports on the 7005S17PFI8?

When configured as Master (M/S = H), BUSYL and BUSYR are push-pull outputs that assert low during port contention - e.g., if both ports attempt to write to the same address simultaneously. The earlier port wins arbitration; tAPS = 5 ns setup ensures deterministic resolution without external logic.

Can the 7005S17PFI8 be used in a 16-bit data system?

Yes - the IDT7005 family supports cascaded Master/Slave configurations using the M/S pin. Two 7005S17PFI8 devices can be combined to form a 8K × 16 memory with full-speed operation and no external glue logic, as described in the device's functional description and pinout notes.

What is the function of the SEM pins on the 7005S17PFI8?

SEML and SEMR enable access to the internal 8-bit semaphore register file. When SEM = VIH, the memory array is selected; when SEM = VIL, the semaphore flags (addressed by A0–A2) are accessed. This dual-mode operation is controlled independently per port.