Renesas 7005S15PFI8

Overview

7005S15PFI8 from IDT is a high-speed 8K × 8 true dual-port static RAM with independent left/right ports, 15 ns maximum read cycle time (commercial grade), TTL-compatible 5V ±10% supply, and integrated hardware semaphore/arbitration logic for concurrent access coordination in real-time embedded systems.

For engineers reviewing the 7005S15PFI8 datasheet, 7005S15PFI8 pinout, 7005S15PFI8 application, or 7005S15PFI8 equivalent, this device supports simultaneous asynchronous reads/writes across ports, full BUSY/INT flag signaling, and Master/Slave cascading for 16-bit+ memory expansion - critical for multiprocessor communication buffers and industrial motion controllers.

Technical Context

The 7005S15PFI8 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 arbitration logic. Its on-chip arbitration resolves contention via BUSYL/BUSYR flags and M/S select pin.

It integrates eight hardware semaphore registers (addressed by A0–A2) with dedicated SEM/INT pins and supports battery backup data retention at 2V (IDT7005L variant), though the S-version prioritizes speed over ultra-low standby power. All timing parameters are specified under VCC = 5.0V ±10%, TA = 0°C to +70°C.

Key Specifications

Pinout & Package

64-pin Thin Quad Flatpack (TQFP), body size 14 mm × 14 mm × 1.4 mm, lead pitch 0.5 mm. Pin 1 marked by corner notch; top-side view shown in datasheet 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 CY7C136-15VC and AS7C38097A-15JCIN, the 7005S15PFI8 uniquely integrates hardware semaphore registers and push-pull BUSY arbitration - enabling deterministic, zero-software-overhead inter-processor synchronization essential for safety-critical and high-throughput embedded systems.

Availability

7005S15PFI8 is available at Aetrix Electronics and suitable for industrial motion control, telecom line card buffering, and avionics display interfaces requiring stable component supply, long-term lifecycle support, and guaranteed commercial-temperature performance.

Supply support for 7005S15PFI8 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, and RF solutions, acquired by Renesas Electronics in 2019.

The IDT7005 family was designed specifically for high-reliability dual-processor and FPGA-based systems requiring deterministic, low-latency shared memory with hardware-enforced arbitration - targeting industrial automation, aerospace, and communications infrastructure.

FAQ

What is the maximum operating temperature range for the 7005S15PFI8?

The 7005S15PFI8 is rated for commercial temperature operation from 0°C to +70°C. It is not qualified for industrial (−40°C to +85°C) or military ranges - those require specific suffix variants like 7005S15PFII8 or 7005S15PFMI8. This thermal specification ensures stability in office, lab, and non-ruggedized industrial environments where ambient heat dissipation is controlled.

Does the 7005S15PFI8 support battery backup data retention?

No, the 7005S15PFI8 does not support battery backup data retention. That feature is exclusive to the IDT7005L variant (e.g., 7005L15PFI8), which specifies 2V data retention and lower standby current (1 µA typ). The 'S' suffix denotes the high-speed version optimized for 15 ns access time, with typical standby current of 20 mA - making it unsuitable for battery-powered holdover applications.

How does the M/S pin affect BUSY signal behavior on the 7005S15PFI8?

When M/S = H (high), the 7005S15PFI8 operates as a master: BUSYL and BUSYR are push-pull outputs that assert during address contention. When M/S = L (low), it operates as a slave: BUSYL and BUSYR become inputs that must be driven externally (e.g., by a master device) to inhibit writes during contention - enabling hierarchical arbitration in multi-chip configurations without additional logic.

Can the 7005S15PFI8 perform simultaneous read operations on both ports to the same memory address?

Yes, the 7005S15PFI8 supports true simultaneous reads to the same address from both ports - a core feature of its "true dual-port" architecture. Unlike pseudo-dual-port devices, no BUSY flag is asserted, no arbitration delay occurs, and both ports return valid data within their respective tAA/tACE timing windows (≤15 ns), enabling lock-free status mirroring and real-time monitoring applications.

What package type is used for the 7005S15PFI8, and are there footprint-compatible alternatives?

The 7005S15PFI8 uses a 64-pin Thin Quad Flatpack (TQFP) package, designated PNG64, with 14 mm × 14 mm body and 0.5 mm lead pitch. While CY7C136-15VC shares the same 64-pin TQFP footprint, the IDT7005S15PFI8 is not pin-compatible with PLCC or PGA variants of the same family (e.g., 7005S15PFI) due to differing pin counts and signal assignments - board redesign is required for package migration.