Microchip Technology MCP25050-E/P

Overview

MCP25050-E/P from Microchip Technology is a CAN v2.0B I/O expander IC that integrates 4-channel 10-bit ADC, dual 10-bit PWM outputs, and eight configurable GPIOs - enabling microcontroller-less CAN node implementation. It supports programmable bit rates up to 1 Mb/s, features non-volatile configuration memory, operates from 2.7V to 5.5V, and delivers 10 mA active / 30 µA standby current. It is used in automotive body control modules for distributed sensor/actuator interfacing over CAN.

For engineers reviewing the MCP25050-E/P datasheet, MCP25050-E/P pinout, MCP25050-E/P application, or MCP25050-E/P equivalent, key selection considerations include its integrated analog input capability (four 10-bit channels), automatic edge- and threshold-triggered CAN message transmission, self-configuring non-volatile setup, and compatibility with industrial (-40°C to +85°C) and extended temperature (-40°C to +125°C) operation.

Technical Context

The MCP25050-E/P implements a full CAN v2.0B protocol engine with double-buffered reception (two independent receive buffers), one programmable mask, two full-acceptance filters, and three prioritized transmit buffers. Its CAN module includes error management logic with TEC/REC counters, bus-off recovery, and resynchronization via programmable time quanta (TQ), sync jump width (SJW), and phase segments.

It embeds peripheral subsystems including four 10-bit ADC channels with selectable VREF+/- sources, two independent 10-bit PWM generators, and eight general-purpose I/Os - each individually configurable as input or output with optional transmit-on-pin-change. Configuration is stored in non-volatile memory and auto-loaded at power-up.

Key Specifications

Pinout & Package

Package: 14-pin PDIP (300 mil), through-hole mounting compatible with legacy PCB assembly and prototyping.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP25050-E/P, MCP2515-I/SO requires external MCU and peripheral ICs to replicate analog/digital functionality, while MCP25625-H/SO offers superior diagnostics and CAN FD support but omits on-chip ADC/PWM - making MCP25050-E/P uniquely suited for self-contained, microcontroller-free sensor/actuator nodes.

Availability

MCP25050-E/P is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor networks, heavy equipment monitoring, and commercial HVAC systems requiring stable component supply and long-term lifecycle support.

Supply support for MCP25050-E/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 U.S.-based semiconductor manufacturer specializing in microcontrollers, analog devices, and connectivity solutions for embedded control applications.

The MCP2502X/5X product line was designed to simplify CAN network expansion in resource-constrained nodes - delivering integrated analog, digital, and communication functions in a single IC to eliminate microcontrollers in basic I/O applications.

FAQ

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

The MCP25050-E/P functions as a self-contained CAN v2.0B I/O expander that replaces the need for a microcontroller in simple node applications. It handles analog-to-digital conversion, digital I/O control, PWM generation, and CAN message transmission/reception autonomously - loading its configuration from non-volatile memory at power-up and entering "On Bus" state without host intervention. The MCP25050-E/P is specifically optimized for distributed sensor and actuator interfacing in automotive and industrial networks.

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

The MCP25050-E/P supports only classical CAN v2.0B (up to 1 Mb/s) and does not implement CAN FD features such as flexible data-rate or extended data length. Its CAN module is hardware-limited to standard and extended identifier formats with fixed 0–8 byte payloads. For CAN FD migration, Microchip recommends the MCP25625-H/SO as a functional alternative - though it lacks the integrated ADC and PWM found in the MCP25050-E/P.

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

The MCP25050-E/P provides four analog input channels (AN0–AN3), each with 10-bit resolution and programmable conversion clock and reference sources (VREF+ and VREF−). These channels are accessible via GP0–GP3 pins, which serve dual roles as analog inputs and general-purpose I/Os. The MCP25050-E/P uses these inputs to support threshold-triggered CAN message transmission - a core feature distinguishing it from the MCP2502X series, which lacks ADC functionality.

Can the MCP25050-E/P operate without an external crystal?

Yes, the MCP25050-E/P supports external clock input via the OSC1 pin, allowing operation with a precision oscillator or clock generator instead of a crystal. When using an external clock, OSC2 is left unconnected. The device requires a stable clock source between 1 MHz and 20 MHz to meet CAN timing requirements - whether derived from a crystal (with OSC1/OSC2) or external clock (OSC1 only). This flexibility simplifies layout in noise-sensitive or space-constrained designs.

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

Yes, the MCP25050-E/P shares identical pinout and package (14-pin PDIP) with all members of the MCP2502X/5X family, including MCP25020, MCP25025, and MCP25055. Functional differences - such as presence of ADC (MCP2505X only) or 1-wire CAN mode (MCP250X5 only) - are implemented internally and do not affect mechanical or electrical pin compatibility. However, firmware and configuration must be validated per variant due to differing peripheral availability.