TS68040MF25A

Overview

The TS68040MF25A is a third-generation, 32-bit microprocessor from the TS68000 family manufactured by Atmel. It integrates an integer unit, an IEEE 754-compatible floating-point unit (FPU), and independent instruction and data memory management units (MMUs) with 4K-byte caches. Operating at 25 MHz with a 5V supply, it delivers up to 42 MIPS and 5.6 MFLOPS. The device features a nonmultiplexed synchronous bus interface, supports multimaster applications via bus snooping, and includes JTAG test mode compliance.

Feature Summary

• Integrates concurrent execution units including an integer unit, FPU, and independent MMUs with physical caches for simultaneous instruction and data access.
• Supports virtual memory systems through logical-to-physical address translation using on-chip Translation Address Caches (ATCs).
• Ensures cache coherency in multimaster environments via dedicated on-chip bus snooping logic.
• Maintains user-object-code compatibility with earlier TS68000 microprocessors while optimizing compiler-generated code execution.

Applications

• High-performance embedded processing systems requiring virtual memory support.
• Multimaster and multiprocessing architectures utilizing bus snooping for cache coherency.
• Scientific or engineering applications demanding IEEE 754 floating-point arithmetic performance.
• UNIX System V port implementations and high-level language environments.

Procurement Notes

Verify that the component matches the specific Atmel manufacturing origin rather than NXP or other successors, as the datasheet identifies Atmel as the producer. Confirm the package type corresponds to the 'M' suffix designation within the ceramic PGA or CQFP options detailed in the mechanical data. Ensure screening levels meet MIL-STD-883 Class B or Atmel standards if required for your application. Check for RoHS compliance status relative to the production date of this specific lot.

Selection Notes

Select this processor when system requirements demand high-throughput integer and floating-point operations within a monolithic HCMOS design. Consider the thermal characteristics carefully, as power dissipation varies significantly based on output buffer configurations and operating frequency. Evaluate the need for external heat sinks or forced air cooling if ambient temperatures exceed standard ranges. Ensure software tools, such as optimizing C compilers, are available for the target architecture.

Part Context

This component belongs to the TS68000 family of 32-bit microprocessors, representing the third generation of 68000-compatible designs. It enhances previous generations by integrating complex memory management and floating-point capabilities directly onto the die. The TS68040 series bridges the gap between simpler controllers and more complex multi-chip solutions, offering a balance of speed, power, and integration density for advanced embedded control tasks.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify backward compatibility with existing TS68030-based designs due to object-code compatibility. Consult manufacturer obsolescence notices for potential end-of-life status or recommended upgrades within the broader 68000 family lineage.