Renesas 7005S20PFI8

Overview

7005S20PFI8 from IDT is a high-speed 8K × 8 dual-port static RAM with true independent left/right ports, 20 ns max access time (industrial grade), TTL-compatible 5V ±10% supply, and on-chip semaphore/arbitration logic-used in real-time inter-processor communication, video frame buffers, and military-grade avionics data exchange.

For engineers reviewing the 7005S20PFI8 datasheet, 7005S20PFI8 pinout, 7005S20PFI8 application, or 7005S20PFI8 equivalent, key selection criteria include simultaneous dual-port read capability, BUSY/INT flag timing at −40°C to +85°C, master/slave cascading support, and 64-pin TQFP package compatibility with PCB layout for high-reliability embedded systems.

Technical Context

The 7005S20PFI8 implements fully asynchronous dual-port operation with separate address, control, and I/O buses per port. Its on-chip arbitration logic resolves contention via BUSY flag assertion (M/S = H) or BUSY input (M/S = L), while semaphore signaling uses A0–A2 addressing of eight shared flags.

It supports two distinct memory access modes: RAM mode (CE = VIL, SEM = VIH) and semaphore mode (CE = VIH, SEM = VIL). The device guarantees tRC = 20 ns, tAA ≤ 20 ns, and tBDD ≤ 30 ns under industrial temperature conditions, with push-pull BUSY/INT outputs and non-tristated interrupt signaling.

Key Specifications

Pinout & Package

64-pin TQFP (PNG64) package with 0.5 mm pitch, thermally enhanced construction, and symmetric I/O distribution across left (L) and right (R) ports. All VCC pins require local decoupling; all GND pins must be connected to solid ground plane.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C136-20JC and AS7C38098B-20TIN, the 7005S20PFI8 uniquely integrates full hardware semaphore, master/slave cascading, and 5V-native arbitration - reducing BOM count and improving determinism in safety-critical dual-processor systems.

Availability

7005S20PFI8 is available at Aetrix Electronics and suitable for real-time inter-processor communication, video frame buffering, and military data link interface applications requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 7005S20PFI8 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 7005S20PFI8 belongs to IDT's legacy dual-port SRAM product line, designed specifically for deterministic, low-latency shared-memory architectures in avionics, test equipment, and programmable logic controllers.

FAQ

What is the maximum operating temperature range for the 7005S20PFI8?

The 7005S20PFI8 is rated for industrial temperature operation from −40°C to +85°C. This specification is guaranteed across all AC and DC electrical parameters in the datasheet, including 20 ns access time, BUSY arbitration timing, and power consumption metrics - making it suitable for deployment in uncontrolled environmental enclosures without forced cooling.

Does the 7005S20PFI8 support true simultaneous read operations from both ports to the same memory location?

Yes, the 7005S20PFI8 uses true dual-port memory cells that allow concurrent reads from identical addresses on the left and right ports without contention, arbitration delay, or data corruption. This behavior is inherent to the silicon cell design and requires no external logic or timing coordination - a key differentiator from pseudo-dual-port or FIFO-based alternatives.

How does the M/S pin affect BUSY signal behavior in the 7005S20PFI8?

When M/S = H, the 7005S20PFI8 operates as a master: BUSYL and BUSYR become push-pull outputs that assert low during port contention. When M/S = L, it operates as a slave: BUSYL and BUSYR become inputs that must be driven externally (e.g., by a master device) to inhibit writes - enabling hierarchical multi-device memory expansion without additional arbitration ICs.

Can the 7005S20PFI8 retain data during power loss, and what voltage is required?

The 7005S20PFI8 supports data retention at VCC ≥ 2.0 V, as confirmed in the "Data Retention Characteristics" section of the datasheet. While the L-version (7005L) specifies typical 100 µA retention current, the S-version (7005S20PFI8) maintains functional retention down to 2 V - enabling integration with standard 3.0 V or 3.3 V backup batteries via simple diode-OR circuitry.

What package type is used for the 7005S20PFI8, and are there footprint-compatible alternatives?

The 7005S20PFI8 uses a 64-pin thin quad flatpack (TQFP) with 0.5 mm pitch and 14 mm × 14 mm body size (PNG64). It shares identical mechanical dimensions and land pattern with other IDT 64-pin TQFP dual-port SRAMs (e.g., 7006S20PFI8), but is not footprint-compatible with 68-pin PLCC or PGA variants due to differing pin count, pitch, and thermal pad requirements.