TS68040VR33A

Overview

The TS68040VR33A is a third-generation, 32-bit microprocessor from Atmel (Microchip Technology), belonging to the TS68000 family. It operates at clock frequencies of 25 MHz and 33 MHz with a 5V supply voltage. The device integrates an integer unit, an IEEE 754-compatible floating-point unit (FPU), and independent instruction and data memory management units (MMUs). Each MMU includes a 4K byte physical cache. The processor features a nonmultiplexed synchronous external bus interface supporting burst transfers.

Feature Summary

• Concurrent execution of integer instructions, floating-point operations, and memory management tasks via multiple independent pipelines.
• Integrated hardware support for virtual memory systems through demand-paged translation tables and address translation caches.
• On-chip bus snooping logic ensures cache coherency in multimaster and multiprocessing environments.
• User-object-code compatibility with previous TS68000 family members, including the TS68030.

Applications

• High-performance embedded control systems requiring real-time processing
• Multiprocessing architectures utilizing bus snooping for shared memory coherence
• Virtual memory applications demanding hardware-assisted address translation
• Industrial automation controllers operating under MIL-STD-883 reliability standards

Procurement Notes

Verify that the specific ordering suffix corresponds to the required package type and screening level. The datasheet specifies ceramic packages such as PGA or CQFP variants. Confirm compliance with MIL-STD-883 Class B or Atmel standards if military-grade screening is required. Ensure the voltage rating matches the system's 5V ± 5% requirement. Check for availability of thermal management components like heat sinks if operating near maximum power dissipation limits.

Selection Notes

Select this component when high throughput is necessary for both integer and floating-point calculations. The integrated FPU eliminates the need for external coprocessors. Consider the thermal characteristics carefully, as power dissipation varies significantly based on output buffer configurations. Evaluate the need for forced air cooling or heat sinks depending on the ambient temperature and buffer mode selected. Verify that the 196-pin or 179-pin package fits the board layout constraints.

Part Context

This microprocessor represents the third generation of the 68000-compatible line, succeeding the TS68030. It introduces significant architectural enhancements, specifically the integration of the FPU and MMUs directly onto the die. This consolidation reduces board space and improves signal integrity compared to multi-chip solutions. The device maintains software compatibility while offering substantial performance gains through parallel execution units.

Replacement Considerations

The TS68040VR33A is functionally compatible with earlier TS68000 family members regarding object code. However, direct pin-for-pin replacement requires verifying the package outline and voltage levels. No official substitute part numbers are listed in the provided documentation.