Renesas 7005S35PFG

Overview

7005S35PFG 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 for inter-processor communication in real-time embedded systems.

For engineers reviewing the 7005S35PFG datasheet, 7005S35PFG pinout, 7005S35PFG application, or 7005S35PFG equivalent, this page delivers verified timing specs, master/slave BUSY arbitration behavior, semiconductor-grade DC/AC electrical characteristics, and exact TQFP-64 package mapping - all confirmed against IDT's official 7005S/L datasheet Rev. 6.42.

Technical Context

The 7005S35PFG implements fully asynchronous dual-port operation: each port (left/right) has dedicated address (A0L–A12L / A0R–A12R), data (I/O0L–I/O7L / I/O0R–I/O7R), and control lines (CEL/CER, R/WL/R/WR, OEL/OER). It supports simultaneous reads of the same memory location and uses on-chip arbitration to resolve contention via BUSY flag assertion or M/S-selectable master/slave mode.

It integrates full hardware semaphore signaling (8 flags addressed by A0–A2), interrupt flag generation (INTL/INTR), and automatic power-down via chip enable (CE). The device operates across commercial and industrial temperature ranges (−40°C to +85°C) and retains data at 2 V for battery backup applications.

Key Specifications

Pinout & Package

7005S35PFG is packaged in a 64-pin thin quad flatpack (TQFP), body size 14 mm × 14 mm × 1.4 mm, lead pitch 0.5 mm, RoHS-compliant and green-part qualified.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-35AXC and AS7C38098B-35PCN, the 7005S35PFG uniquely combines 5 V compatibility, hardware semaphore, BUSY arbitration, and 2 V data retention - making it irreplaceable in industrial and avionics systems requiring deterministic, low-latency, fault-resilient shared memory.

Availability

7005S35PFG is available at Aetrix Electronics and suitable for real-time industrial PLCs, dual-core embedded controllers, avionics data concentrators, and redundant communication gateways requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 7005S35PFG 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 was designed specifically for deterministic inter-processor communication in real-time embedded systems, delivering hardware-accelerated arbitration, semaphore, and interrupt capabilities within a single dual-port SRAM die.

FAQ

What is the maximum operating temperature range supported by the 7005S35PFG?

The 7005S35PFG is rated for industrial temperature operation from −40°C to +85°C, as confirmed in IDT's official datasheet Rev. 6.42, Table 5. This range applies to all speed grades including the 35 ns version, and is validated under full AC/DC electrical specifications without derating.

Does the 7005S35PFG support battery backup operation, and what voltage is required?

Yes, the 7005S35PFG supports battery backup operation with guaranteed data retention at 2.0 V (VDR), as specified in Table 9 of the IDT datasheet. This allows seamless transition to backup power during main supply interruption without data loss or external retention circuitry.

How does the M/S pin affect BUSY signal behavior on the 7005S35PFG?

When M/S = H, BUSYL and BUSYR function as push-pull outputs indicating port contention; when M/S = L, they become inputs used to synchronize slave devices in cascaded MASTER/SLAVE configurations. This dual-mode behavior is explicitly defined in Notes 1 and 2 of the Pin Names table (Page 3) and functional block diagram.

Can the 7005S35PFG perform simultaneous reads from both ports to the same memory address?

Yes, the 7005S35PFG features true dual-ported memory cells that allow simultaneous reads from both left and right ports to identical addresses without contention, arbitration, or timing penalty - a core capability highlighted in the "Features" section on Page 1 of the datasheet.

What is the purpose of the SEM pins on the 7005S35PFG, and how are semaphore flags accessed?

The SEML and SEMR pins enable access to eight dedicated hardware semaphore registers. When SEM = L (low), the device routes I/O0–I/O7 to semaphore flags addressed by A0–A2; this mode is mutually exclusive with normal memory access (which requires SEM = H), as defined in Truth Table II (Page 4) and timing diagrams on Pages 11–12.