MCP25020-E/P

I/o Expanders Overview

The MCP25020-E/P is a CAN I/O expander from the MCP2502X/5X family, designed to implement CAN v2.0B active protocols with bus rates up to 1 Mb/s. It operates on a 2.7V to 5.5V supply, drawing 10 mA typically in active mode and 30 µA in standby. The device features eight general-purpose I/O lines selectable as inputs or outputs, three auto-transmit buffers, and two message reception buffers. It includes one programmable mask and two acceptance filters for identifier filtering. Configuration is stored in non-volatile memory and loaded automatically at power-up. The -E suffix indicates an extended temperature range of -40°C to +125°C, housed in a 14-pin PDIP package.

I/o Expanders Feature Summary

• Implements CAN V2.0B protocol without requiring synchronization or configuration messages
• Features non-volatile memory for user configuration that loads automatically on power-up
• Provides eight general-purpose I/O lines individually selectable as inputs or outputs
• Supports message scheduling and automatic transmission on error conditions

I/o Expanders Applications

• CAN system nodes implemented without a microcontroller
• Digital I/O expansion over Controller Area Network
• Message scheduling and edge detection applications

I/o Expanders Procurement Notes

Verify the ordering suffix matches the required temperature grade and package type. The 'E' denotes extended temperature operation, while 'P' indicates the PDIP package. Confirm the specific revision against the manufacturer's datasheet DS20001664E to ensure compatibility with existing designs.

I/o Expanders Selection Notes

Select this component for applications requiring standalone CAN node implementation without a host MCU. Compare against MCP25025 if one-wire operation is needed, or MCP25050/X if analog input channels are required. Note that this family is marked Not Recommended for New Designs; consider MCP2515 or MCP25625 for new projects.

I/o Expanders Part Context

The MCP25020-E/P belongs to the MCP2502X/5X CAN I/O Expander Family. It shares core functionality with the MCP25025 but lacks optional one-wire capability. It differs from the MCP2505X series by excluding analog-to-digital conversion channels and PWM outputs. The device serves as a dedicated interface for digital I/O expansion within CAN networks.

I/o Expanders Replacement Considerations

Microchip recommends using MCP2515 or MCP25625 for new designs. Direct pin-compatible replacements are not explicitly listed in the provided documentation.