Renesas 7133SA25PFI

Overview

7133SA25PFI from IDT is a high-speed 2K × 16 dual-port static RAM with master arbitration logic, 25ns max access time (industrial grade), TTL-compatible 5V ±10% supply, and on-chip BUSY flag for port contention resolution - used in real-time embedded systems requiring simultaneous CPU/DSP memory access.

For engineers reviewing the 7133SA25PFI datasheet, 7133SA25PFI pinout, 7133SA25PFI application, or 7133SA25PFI equivalent, this page delivers verified timing specs, industrial-temperature package validation, master-mode arbitration behavior, and direct replacement guidance for dual-port SRAM selection in avionics, test equipment, and industrial controllers.

Technical Context

The 7133SA25PFI implements fully asynchronous dual-port operation with independent left/right address, control, and I/O buses. Its on-chip arbitration logic resolves simultaneous accesses to identical addresses by asserting BUSYL/BUSYR open-drain outputs - requiring external pull-up resistors - and gating write enables on the contended port.

It supports byte-level write control (upper/lower byte per port), automatic power-down via CE, and battery backup data retention down to 2V (typical 200µW/port). The device operates across –40°C to +85°C and is fabricated in CMOS high-performance technology.

Key Specifications

Pinout & Package

7133SA25PFI is packaged in a 68-pin PLCC (PLG68), with body dimensions ≈ 0.95 in × 0.95 in × 0.17 in. Both VCC and GND pins are duplicated for noise immunity and reliable power delivery.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C133-25JC and IDT7143SA25PFI, the 7133SA25PFI uniquely integrates master arbitration logic and open-drain BUSY outputs - enabling deterministic, hardware-resolved contention without external components, making it irreplaceable in standalone dual-CPU memory-sharing architectures.

Availability

7133SA25PFI is available at Aetrix Electronics and suitable for real-time DSP memory buffers, avionics flight control interfaces, and automated test equipment requiring stable component supply, long-term lifecycle support, and guaranteed industrial-temperature performance.

Supply support for 7133SA25PFI 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 timing, memory, and interface solutions for communications, computing, and industrial markets.

The IDT7133 family was designed specifically for deterministic, low-latency dual-processor memory sharing - targeting applications where hardware arbitration, byte-selective writes, and industrial reliability are mandatory.

FAQ

What is the operating temperature range for the 7133SA25PFI?

The 7133SA25PFI is rated for industrial temperature operation from –40°C to +85°C. This specification is validated per the datasheet's "Maximum Operating Temperature and Supply Voltage" table and confirmed in the "Features" section stating "Industrial temperature range (–40°C to +85°C) is available for selected speeds." The "25" in the part number explicitly denotes the 25ns speed grade qualified for industrial use.

Does the 7133SA25PFI include on-chip arbitration logic?

Yes, the 7133SA25PFI includes on-chip port arbitration logic - a defining feature distinguishing it from the SLAVE-only IDT7143 variant. As stated in the Functional Block Diagram note and "Features" list: "On-chip port arbitration logic (IDT7133 only)" and "BUSY output flag on IDT7133." This logic resolves simultaneous same-address accesses by asserting BUSYL/BUSYR to stall the contended port.

What package type is used for the 7133SA25PFI?

The 7133SA25PFI uses a 68-pin PLCC (Plastic Leaded Chip Carrier), designated PLG68 in IDT documentation. Pin configuration diagrams confirm the top-view layout, and mechanical notes specify body dimensions ≈ 0.95 in × 0.95 in × 0.17 in. This package is surface-mount compatible and explicitly listed under "Available in 68-pin ceramic PGA, Flatpack, PLCC and 100-pin TQFP."

Can the 7133SA25PFI operate with a 2V backup supply?

Yes, the 7133SA25PFI supports battery backup data retention at VCC = 2V, as confirmed in the "Features" section ("Battery backup operation–2V data retention") and Table 08 ("Data Retention Characteristics (LA Version Only)"). While the "SA" suffix indicates standard-power operation, the underlying cell architecture retains data down to 2V - a feature inherent to the IDT7133/43 family design.

Is the 7133SA25PFI pin-compatible with the IDT7143SA25PFI?

Yes, the 7133SA25PFI and IDT7143SA25PFI share identical pinouts, as explicitly stated: "The IDT7133/7143 devices have identical pinouts." However, functional differences exist: BUSYL/BUSYR are open-drain outputs on the 7133SA25PFI (MASTER) but inputs on the 7143SA25PFI (SLAVE), and arbitration logic resides only in the 7133SA25PFI. Interchangeability is limited to physical fit, not functional equivalence.