Renesas 7005S35PF

Overview

7005S35PF from IDT is a high-speed 8K × 8 dual-port static RAM with true independent left/right ports, 35 ns maximum read cycle time (tRC), TTL-compatible 5 V ±10% supply, and integrated hardware semaphore/arbitration logic - used in real-time interprocessor communication, video frame buffers, and military-grade avionics data exchange systems.

For engineers reviewing the 7005S35PF datasheet, 7005S35PF pinout, 7005S35PF application, or 7005S35PF equivalent, this page delivers verified timing specs, master/slave BUSY arbitration behavior, semiconductor-level DC/AC electrical characteristics, and exact TQFP-64 package mapping per IDT documentation.

Technical Context

The 7005S35PF implements fully asynchronous dual-port operation with separate address, control, and I/O buses for left (L) and right (R) ports - enabling simultaneous reads to the same memory location without contention. It supports both CE-controlled and R/W-controlled write cycles with defined tEW, tWP, and tDW timing windows.

On-chip arbitration uses push-pull BUSY outputs (M/S = H) or BUSY inputs (M/S = L), with tAPS = 5 ns priority setup time and tBDD ≤ 35 ns disable-to-valid-data delay. Semaphore access requires SEM = VIL and CE = VIH, addressing eight flags via A0–A2 with tSAA ≤ 35 ns access time.

Key Specifications

Pinout & Package

7005S35PF is housed in a 64-pin thin quad flatpack (TQFP) with 0.5 mm pitch, 14 mm × 14 mm body, and exposed thermal pad. All VCC pins require decoupling; all GND pins must be connected to system ground plane.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C136-35JC and AS7C38097A-35PCN, the 7005S35PF uniquely integrates full hardware arbitration, semaphore registers, and master/slave configuration - reducing BOM count and eliminating timing-critical firmware locks in real-time systems.

Availability

7005S35PF is available at Aetrix Electronics and suitable for real-time interprocessor communication, video frame buffering, and military avionics data exchange requiring stable component supply across commercial and industrial temperature ranges.

Supply support for 7005S35PF 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 7005S35PF belongs to IDT's legacy dual-port SRAM product line, designed specifically for deterministic, low-latency interprocessor data sharing in safety-critical and real-time embedded systems.

FAQ

What is the maximum operating frequency supported by the 7005S35PF?

The 7005S35PF does not operate on a clock signal - it is an asynchronous device. Its maximum effective throughput is determined by the 35 ns read cycle time (tRC), enabling up to ~28.6 MHz sustained random access when interfaced with properly timed control signals. AC timing parameters like tAA, tACE, and tAOE are all bounded by this 35 ns limit per the datasheet.

Does the 7005S35PF support battery backup operation?

Yes, the 7005S35PF supports battery backup with data retention down to 2.0 V (VDR), drawing ≤4000 µA typical current (ICCDR) in retention mode. This capability is inherent to the "L" variant design lineage and confirmed in Table 9 of the datasheet - making it suitable for applications requiring nonvolatile memory hold during main power interruption.

How does the M/S pin affect BUSY signal behavior on the 7005S35PF?

When M/S = H, the 7005S35PF operates as a master: BUSYL and BUSYR become push-pull outputs that assert LOW during port contention to block writes. When M/S = L, it operates as a slave: BUSYL and BUSYR become inputs that must be driven LOW by a master device to inhibit local writes - enabling hierarchical arbitration in multi-device systems.

Can the 7005S35PF perform simultaneous reads from both ports to the same memory address?

Yes, the 7005S35PF features true dual-port memory cells that allow completely independent, simultaneous reads from both left and right ports to identical addresses without conflict, latency penalty, or data corruption - a core architectural feature confirmed in the "Features" section and functional block diagram of the datasheet.

What package type is used for the 7005S35PF and what are its mechanical dimensions?

The 7005S35PF uses a 64-pin thin quad flatpack (TQFP) package with 0.5 mm lead pitch, measuring 14 mm × 14 mm × 1.4 mm (body height). This is explicitly documented in the "Pin Configurations" section (drawing 2738 drw 03) and "Package Information" notes - distinct from the 68-pin PGA and PLCC variants offered in the same family.