Renesas 7005S15PFI

Overview

7005S15PFI from IDT is a high-speed 8K × 8 dual-port static RAM with true independent left/right ports, 15 ns max read cycle time (commercial grade), TTL-compatible 5V ±10% supply, and integrated hardware semaphore/arbitration logic for real-time inter-processor communication in embedded control systems.

For engineers reviewing the 7005S15PFI datasheet, 7005S15PFI pinout, 7005S15PFI application, or 7005S15PFI equivalent, this page delivers verified timing specs, master/slave BUSY arbitration behavior, semiconductor-level DC/AC electrical characteristics, and industrial-grade thermal validation (-40°C to +85°C) required for deterministic dual-ported memory integration.

Technical Context

The 7005S15PFI implements fully asynchronous dual-port operation with separate address, data, and control buses per port (A0L–A12L/I/O0L–I/O7L/R/WL/CEL/OEL on left; A0R–A12R/I/O0R–I/O7R/R/WR/CER/OER on right), enabling simultaneous reads-even from the same memory location-without contention. Its on-chip arbitration logic uses M/S pin configuration to assign BUSYL/BUSYR as output (master) or input (slave), resolving port conflicts via address-match or CE-controlled priority timing.

It supports two distinct memory access modes: RAM mode (CE = VIL, SEM = VIH) for standard 8K × 8 data storage, and semaphore mode (CE = VIH, SEM = VIL) for eight dedicated flag registers addressed by A0–A2. Interrupt flags (INTL/INTR) are set/cleared via specific address writes (e.g., 1FFF_H sets INTR; 1FFE_H sets INTL), with tINS/tINR ≤20 ns propagation delay.

Key Specifications

Pinout & Package

7005S15PFI is packaged in a 64-pin thin quad flatpack (TQFP), measuring 14 mm × 14 mm × 1.4 mm, with 0.5 mm lead pitch and exposed thermal pad (not electrically connected). All VCC pins require local decoupling; all GND pins must be tied 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 CY7C024AV-15AXC and AS7C38098A-15JCIN, the 7005S15PFI uniquely delivers integrated arbitration, semaphore, and interrupt functions in a pin-compatible 64-pin TQFP package-enabling deterministic real-time memory sharing without additional components or timing-critical firmware.

Availability

7005S15PFI is available at Aetrix Electronics and suitable for industrial automation, avionics subsystems, and medical imaging equipment requiring stable component supply, long-term lifecycle assurance, and guaranteed -40°C to +85°C performance.

Supply support for 7005S15PFI 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, now part of Renesas Electronics since 2019.

The IDT7005 product line was engineered specifically for deterministic dual-ported memory applications in real-time embedded systems, emphasizing hardware-coordinated multi-processor communication over software-managed shared memory.

FAQ

What is the maximum operating frequency supported by the 7005S15PFI?

The 7005S15PFI does not operate at a fixed clock frequency; it is an asynchronous SRAM. Its maximum effective bandwidth is determined by its 15 ns read cycle time (tRC), enabling up to 66.7 million accesses per second per port under ideal conditions. Actual throughput depends on system-level timing margins, address/data setup/hold times, and bus contention resolution.

Does the 7005S15PFI support battery backup operation?

Yes, the 7005S15PFI supports battery backup operation with data retention down to 2 V (VDR), as specified in Table 9. When main VCC drops below 2 V, the device enters data retention mode with ICCDR ≤4000 µA (military/industrial grade), preserving memory contents without external circuitry.

How does the M/S pin affect BUSY signal behavior on the 7005S15PFI?

When M/S = H, the 7005S15PFI operates as a master: BUSYL and BUSYR become push-pull outputs that assert LOW during port contention to block conflicting writes. When M/S = L, it operates as a slave: BUSYL and BUSYR become inputs, and external BUSY signals from a master device must be applied to prevent simultaneous writes.

Can the 7005S15PFI perform simultaneous read operations from both ports to the same memory address?

Yes, the 7005S15PFI uses true dual-ported memory cells that allow simultaneous reads from the same address location on both left and right ports without contention, arbitration, or timing penalty-enabling lock-free data sharing in symmetric multiprocessing configurations.

What are the valid interrupt address codes for setting and clearing INTL and INTR on the 7005S15PFI?

To set the left port interrupt flag (INTL), write any value to address 1FFE_H with R/WL = L, CEL = L, and OEL = H. To clear INTL, write to 1FFF_H. For the right port: write to 1FFE_H to set INTR, and to 1FFF_H to clear INTR. These addresses are decoded internally and do not map to RAM storage locations.