Microchip Technology MCP25050-I/P

Overview

MCP25050-I/P from Microchip Technology is a CAN v2.0B-compliant I/O expander IC that integrates 4-channel 10-bit ADC, eight GPIOs, two 10-bit PWM outputs, and non-volatile configuration memory - enabling standalone CAN node operation without an external microcontroller. It supports up to 1 Mb/s bus rate, operates from 2.7V–5.5V, and delivers auto-transmit on digital edge or analog threshold events in industrial temperature range (–40°C to +85°C).

For engineers reviewing the MCP25050-I/P datasheet, MCP25050-I/P pinout, MCP25050-I/P application, or MCP25050-I/P equivalent, this device serves as a self-contained CAN peripheral for distributed sensor/actuator nodes, remote I/O modules, and embedded control systems requiring deterministic message scheduling, low-power sleep mode (30 µA), and in-system reconfiguration via CAN messages.

Technical Context

The MCP25050-I/P implements a full CAN protocol engine with double-buffered reception (two independent RX buffers), one programmable mask, two acceptance filters (RXF0 for Information Request, RXF1 for Input Messages), and three prioritized transmit buffers (TXID0 for On-Bus messages, TXID1 for Command Acknowledge/Errors, TXID2 for auto-triggered events). Its bit timing logic supports fully programmable TQ-based segmentation (SyncSeg, PropSeg, PS1, PS2) with SJW resynchronization and optional triple-sampling at the sample point.

Hardware features include non-volatile EPROM for power-up default configuration, automatic self-configuration on startup, eight TTL-compatible GPIOs individually configurable as inputs or outputs, transmit-on-pin-change capability per input, and four 10-bit analog inputs with programmable VREF+ and VREF– sources - exclusive to the MCP2505X variant family.

Key Specifications

Pinout & Package

14-pin PDIP (300 mil) package with through-hole mounting; RoHS-compliant lead finish; 0.3-inch body width.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar CAN I/O expander applications.

Compared with MCP2515-I/SO and MCP25625-H/SO, the MCP25050-I/P uniquely combines CAN protocol handling, analog sensing, digital I/O, and PWM generation in a single chip - reducing component count and firmware complexity for fixed-function remote nodes, whereas alternatives shift responsibility to external controllers or prioritize scalability over integration.

Availability

MCP25050-I/P is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and energy monitoring systems requiring stable component supply and long-term production continuity.

Supply support for MCP25050-I/P includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Microchip Technology Inc. is a leading provider of microcontrollers, analog devices, and connectivity solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The MCP2502X/5X product line was designed specifically to simplify CAN network expansion in resource-constrained environments - delivering autonomous I/O functionality with minimal external components and no host processor dependency.

FAQ

What is the primary function of the MCP25050-I/P in a CAN system?

The MCP25050-I/P functions as a self-contained CAN I/O expander that replaces the need for a microcontroller in simple nodes. It handles full CAN v2.0B protocol processing, accepts analog and digital inputs, generates PWM outputs, and autonomously transmits messages based on configuration - all using its internal non-volatile memory and hardware state machine. The MCP25050-I/P operates independently once powered and configured.

Does the MCP25050-I/P support CAN FD or only classical CAN?

The MCP25050-I/P supports only classical CAN v2.0B (ISO 11898-1) and does not implement CAN FD features such as flexible data-rate, extended DLC, or CRC separation. Its maximum bit rate is 1 Mb/s with fixed bit timing architecture, and it lacks the protocol enhancements required for CAN FD frame formats. For CAN FD compatibility, Microchip recommends the MCP25625 or MCP2518FD families instead of the MCP25050-I/P.

How many analog input channels does the MCP25050-I/P provide, and what is their resolution?

The MCP25050-I/P provides four analog input channels (AN0–AN3), each with 10-bit resolution. These channels share pins with GPIOs GP0–GP3 and support programmable conversion clock and dual external reference inputs (VREF+ and VREF–) via GP5 and GP4. This configuration enables ratiometric measurements and flexible analog sensing - a feature exclusive to the MCP2505X series and not present in the MCP2502X variants.

Can the MCP25050-I/P operate in low-power modes, and what is its standby current?

Yes, the MCP25050-I/P supports CAN Sleep mode with typical standby current of 30 µA. In this mode, the CAN module remains sensitive to bus activity and can wake automatically on valid message traffic. The device retains all configuration and register states during sleep, and resumes full operation within microseconds after wake-up. This low-power capability makes the MCP25050-I/P suitable for battery-backed or energy-harvesting remote sensor applications.

Is the MCP25050-I/P pin-compatible with other devices in the MCP2502X/5X family?

Yes, the MCP25050-I/P shares identical 14-pin PDIP and SOIC packages and pinout with all MCP2502X/5X devices, including MCP25020, MCP25025, and MCP25055. Pin functions are consistent across the family, though analog and 1-wire capabilities differ by variant - for example, MCP25050 includes ADC but no 1-wire mode, while MCP25055 includes both. This allows drop-in replacement within the same package footprint when functional requirements align.