MCP25050-E/P

I/o Expanders Overview

The MCP25050-E/P is a CAN I/O expander from the MCP2502X/5X family, designed to implement CAN V2.0B with programmable bit rates up to 1 Mb/s. It features eight general-purpose I/O lines and four 10-bit analog input channels with programmable conversion clocks and voltage reference sources. The device includes three auto-transmit buffers and two message reception buffers, along with one programmable mask and two programmable filters. It operates on a 2.7V to 5.5V supply, drawing 10 mA typically in active mode and 30 µA in standby. The -E/P suffix indicates an extended temperature range of -40°C to +125°C and a 14-pin PDIP package.

I/o Expanders Feature Summary

• Integrates digital I/O expansion with four-channel 10-bit analog-to-digital conversion for direct sensor interfacing without a microcontroller.
• Supports hardware-based automatic message transmission triggered by digital input edge detection or analog threshold exceedance.
• Includes non-volatile memory that automatically loads user configuration upon power-up, eliminating the need for external initialization sequences.

I/o Expanders Applications

• Industrial automation nodes requiring distributed I/O monitoring via CAN bus.
• Vehicle subsystems utilizing CAN V2.0B for sensor data acquisition and control.
• Remote monitoring systems where autonomous error reporting and state changes are required.

I/o Expanders Procurement Notes

Verify the specific ordering suffix to confirm the package type and temperature rating. The '-P' designation corresponds to the 14-pin PDIP package, while '-E' denotes the extended industrial temperature range. Ensure the component revision matches the design requirements, as this family is marked Not Recommended for New Designs.

I/o Expanders Selection Notes

Select the MCP25050 variant specifically when analog input capabilities are necessary, distinguishing it from the MCP25020 which lacks A/D converters. Confirm that the 14-pin PDIP package fits the mechanical constraints of the target PCB layout. Verify that the CAN bus timing parameters align with the available oscillator frequencies and desired baud rates.

I/o Expanders Part Context

This component belongs to the MCP2502X/5X CAN I/O Expander Family, which integrates CAN protocol handling with peripheral functions. The MCP25050 specifically adds analog input functionality compared to the MCP25020. Microchip recommends using the MCP2515 or MCP25625 for new designs instead of this legacy series.

I/o Expanders Replacement Considerations

Microchip officially recommends the MCP2515 or MCP25625 as replacements for new designs. These newer devices offer updated performance characteristics and support while maintaining compatibility with CAN V2.0B standards.

I/o Expanders FAQ

Does the MCP25050 require external synchronization messages?

No, the device does not require synchronization or configuration messages to operate on the CAN bus.

How many acceptance filters are available for message filtering?

The device provides two programmable acceptance filters (RXF0 and RXF1) and one programmable mask.

What is the function of the non-volatile memory in this device?

The non-volatile memory stores user configuration settings that are automatically loaded into the SRAM upon power-up.