DS80C390-FCR

Microcontrollers Overview

The DS80C390-FCR is a high-speed 8051-compatible microprocessor featuring dual CAN 2.0B controllers and a hardware math accelerator. It supports a maximum crystal speed of 40MHz, achieving apparent execution speeds of 100MHz. The device includes 4kB of internal SRAM usable as program, data, or stack memory. It operates within a supply voltage range of 4.75V to 5.5V and functions in an ambient temperature range of 0°C to +70°C. The component is housed in a 64-pin LQFP package.

Microcontrollers Feature Summary

• Redesigned processor core executes instructions up to three times faster than standard 8051 architectures for the same clock frequency.
• Integrated hardware math accelerator increases processing speed for 32-bit and 16-bit multiply, divide, shift, normalization, and accumulate operations.
• Dual full-function CAN 2.0B controllers provide high integration for network communication applications.
• Optional internal frequency multiplier allows operation at full speed with reduced external crystal frequencies to minimize electromagnetic interference.

Microcontrollers Applications

• Industrial Controls
• Factory Automation
• Medical Equipment

Microcontrollers Procurement Notes

Verify the specific ordering suffix against manufacturer documentation to confirm lead-free status and compliance requirements. Confirm that the 64-pin LQFP package matches the target PCB footprint. Ensure the commercial temperature rating aligns with the operational environment constraints before finalizing procurement.

Microcontrollers Selection Notes

Select this component when high-speed instruction throughput and integrated CAN bus connectivity are required. The architecture is suitable for designs needing enhanced mathematical processing capabilities without external coprocessors. Verify compatibility with existing 8051 software codebases due to architectural similarities.

Microcontrollers Part Context

This part belongs to the DS80C390 family of dual CAN high-speed microprocessors manufactured by Analog Devices Inc./Maxim Integrated. The FCR suffix specifically designates the commercial temperature grade variant packaged in a 64-pin Low Profile Quad Flat Package (LQFP).

Microcontrollers Replacement Considerations

DS80C390-QCR

Microcontrollers FAQ

How does the internal frequency multiplier affect EMI?

The optional internal frequency multiplier allows the microprocessor to operate at full speed while using a reduced external crystal frequency, which helps reduce electromagnetic interference.

What is the function of the MUX pin?

The MUX pin selects whether the address/data bus operates in multiplexed mode (MUX = 0) or demultiplexed mode (MUX = 1).