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Home > Products > Integrated Circuits (ICs) > Interface > I/O Expanders

Microchip Technology MCP25050-E/SL

Name: MCP25050-E/SL
Brand: Microchip Technology
SKU: MCP25050-E/SL
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MCP25050-E/SL

Manufacturer:: Microchip Technology

Category:: I/O Expanders

Package:: 14-SOIC (0.154", 3.90mm Width)

Datasheet:: MCP25050-E/SL.pdf

Description:: IC XPNDR 25MHZ CAN V2.0B 14SOIC

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Product details

Overview

MCP25050-E/SL from Microchip Technology is a CAN v2.0B I/O expander IC that integrates digital I/O, four 10-bit analog inputs (AN0–AN3), two 10-bit PWM outputs, and non-volatile configuration memory - enabling standalone CAN node operation without an external microcontroller. It supports programmable bit rates up to 1 Mb/s, features three auto-transmit buffers, two message reception buffers, and operates from 2.7V to 5.5V in industrial and extended temperature ranges.

For engineers reviewing the MCP25050-E/SL datasheet, MCP25050-E/SL pinout, MCP25050-E/SL application, or MCP25050-E/SL equivalent, this device serves as a self-contained CAN peripheral for automotive body control, industrial sensor aggregation, and embedded distributed I/O systems where deterministic message scheduling and analog/digital event-triggered transmission are required.

Technical Context

The MCP25050-E/SL implements a full CAN v2.0B protocol engine with double-buffered RX, one programmable mask, two acceptance filters (RXF0 for Information Request, RXF1 for Input Messages), and automatic error handling including Error-Active/Passive/Bus-Off states. Its finite state machine manages bit-level arbitration, CRC generation (15-bit), and resynchronization using programmable time quanta (TQ), sync jump width (SJW), and phase segments.

Configuration is stored in non-volatile memory and loaded at power-up; device behavior-including transmit-on-pin-change, threshold-based analog triggering, and On Bus message scheduling-is defined by registers accessible via CAN bus commands or ICSP™. The A/D module supports programmable conversion clock and dual VREF sources (VREF+/VREF−), exclusive to MCP2505X variants.

Key Specifications

Parameter	Value and Actual Design Meaning
CAN Compliance	CAN v2.0B active mode - supports standard and extended identifiers, no host MCU required for protocol handling.
Max Bit Rate	1 Mb/s - achieved via programmable baud rate prescaler (BRP = 1–64) and time segment tuning (PropSeg/PS1/PS2).
Analog Inputs	Four 10-bit channels (AN0–AN3) - configurable for threshold detection triggering auto-transmit messages on voltage exceedance.
Digital I/O	Eight GPIOs (GP0–GP7), individually configurable as input/output - with edge-detection transmit-on-change capability per pin.
PWM Outputs	Two 10-bit PWM channels (PWM1/PWM2 on GP2/GP3) - independently programmable frequency, usable for LED dimming or motor control feedback.
Power Supply	2.7V to 5.5V - enables direct interface with 3.3V or 5V CAN transceivers and logic; 10 mA typical active current, 30 µA standby in CAN Sleep mode.
Operating Temp	–40°C to +125°C (Extended range) - qualified for under-hood automotive and high-temperature industrial environments.
Package	14-pin SOIC (150 mil) - surface-mount compatible with standard reflow profiles; pin-compatible with PDIP variant for prototyping.

Pinout & Package

Package: 14-pin SOIC (150 mil), RoHS-compliant, moisture sensitivity level 3.

Pin/Terminal	Circuit Role	Design Meaning
GP0/AN0	Analog input / bidirectional GPIO	Primary analog channel 0; also functions as general-purpose digital I/O with edge-triggered transmit capability.
GP1/AN1	Analog input / bidirectional GPIO	Analog channel 1; supports threshold detection and change-of-state auto-transmit when configured as input.
GP2/AN2/PWM1	Analog input / PWM output / GPIO	Channel 2 analog input or 10-bit PWM output (PWM1); dual-role pin enables mixed-signal feedback loop implementation.
GP3/AN3/PWM2	Analog input / PWM output / GPIO	Channel 3 analog input or second 10-bit PWM output (PWM2); independent frequency control allows differential drive signals.
GP4/VREF−	Analog reference / GPIO	Negative reference input for A/D converter; can be used as digital I/O if external VREF− not required.
GP5/VREF+	Analog reference / GPIO	Positive reference input for A/D; selectable as digital I/O when internal or external VREF+ is used.
VSS	Ground	Primary power return path; decoupling capacitor must be placed adjacent to VDD and VSS pins.
OSC1/CLKIN	Oscillator input / external clock	Accepts crystal (1–20 MHz) or external clock source; determines CAN timing resolution and A/D conversion clock base.
OSC2	Oscillator output	Crystal oscillator output; unused when external clock is applied to OSC1.
GP6/CLKOUT	Output clock / GPIO	Divided system clock output (programmable) or general-purpose output; useful for synchronizing external peripherals.
GP7/RST/VPP	Reset input / programming voltage	Active-low reset; accepts 12V VPP during ICSP™ programming of non-volatile configuration memory.
RXCAN	CAN receive input	Differential receiver input from external CAN transceiver; high-impedance when 1-wire mode is enabled (not applicable to MCP25050).
TXCAN/TXRXCAN	CAN transmit output	Open-drain driver output to external CAN transceiver; not shared with RX in standard two-wire CAN mode.
VDD	Power supply	2.7–5.5V main supply; requires local 0.1 µF ceramic decoupling capacitor between VDD and VSS.

Key Features

Feature	Design Value
Non-volatile configuration memory	Device boots into pre-programmed state - eliminates boot-time initialization code and ensures deterministic startup behavior.
Auto-transmit on analog threshold	Triggers CAN message when any of four A/D channels exceeds user-defined voltage - enables predictive fault reporting without polling.
Edge-triggered digital I/O transmit	Each GPIO supports independent rising/falling-edge detection - reduces bus traffic by eliminating periodic status polling.
Three prioritized transmit buffers	TXID0 (On Bus), TXID1 (Command Ack/Error), TXID2 (Event-triggered) - ensures critical messages (e.g., error conditions) preempt lower-priority data.
Self-configuring CAN state machine	Automatically transitions to "On Bus" after Power-On Self-Configuration - no external command needed to enter active communication mode.
Integrated wake-up filter	Configurable low-pass filter on CAN bus (CNF3.WAKFIL) - prevents spurious wake-from-sleep due to electrical noise or glitches.

Applications

Automotive Body Control Module	Industrial Sensor Aggregation Node
Use Scenario: Monitoring door lock status, window position, and interior lighting via discrete switches and potentiometers in a vehicle body controller. IC Role / Device Role / Timing Role: Standalone CAN node collecting analog (potentiometer position) and digital (switch closure) inputs; autonomously transmitting status updates and fault alerts over CAN bus. Use Value: Eliminates need for dedicated microcontroller - reduces BOM cost and PCB area while maintaining deterministic 1 Mb/s message scheduling and error reporting.	Use Scenario: Consolidating temperature, pressure, and valve position signals from multiple field sensors onto a single CAN backbone in a factory automation system. IC Role / Device Role / Timing Role: Distributed I/O expander performing local A/D conversion and edge-triggered event reporting; operates as a slave node with configurable message IDs and filters. Use Value: Four 10-bit analog inputs and eight GPIOs enable direct connection to common industrial sensors; non-volatile configuration ensures consistent behavior across replacement units.
Smart Lighting Control Node	Embedded Diagnostic Data Logger
Use Scenario: Controlling multi-zone LED brightness and color temperature using PWM outputs while monitoring ambient light and thermal sensors. IC Role / Device Role / Timing Role: Dual-role device acting as both actuator (via PWM1/PWM2) and sensor interface (AN0–AN3, GP0–GP7); schedules On Bus messages for health telemetry. Use Value: Integrated 10-bit PWM eliminates external driver ICs; analog threshold detection triggers immediate alert messages on over-temperature events.	Use Scenario: Capturing and forwarding runtime diagnostics (voltage, temperature, error counters) from legacy equipment to a central CAN-based SCADA system. IC Role / Device Role / Timing Role: CAN bus diagnostic agent - reads internal TEC/REC/EFLG registers and transmits error condition messages (DLC=3) upon warning/passive thresholds. Use Value: Automatic error messaging (hysteresis-enabled) reduces firmware complexity; 30 µA CAN Sleep mode extends battery life in portable diagnostic tools.

Automotive Body Control Module

Industrial Sensor Aggregation Node

Use Scenario: Monitoring door lock status, window position, and interior lighting via discrete switches and potentiometers in a vehicle body controller.

IC Role / Device Role / Timing Role: Standalone CAN node collecting analog (potentiometer position) and digital (switch closure) inputs; autonomously transmitting status updates and fault alerts over CAN bus.

Use Value: Eliminates need for dedicated microcontroller - reduces BOM cost and PCB area while maintaining deterministic 1 Mb/s message scheduling and error reporting.

Use Scenario: Consolidating temperature, pressure, and valve position signals from multiple field sensors onto a single CAN backbone in a factory automation system.

IC Role / Device Role / Timing Role: Distributed I/O expander performing local A/D conversion and edge-triggered event reporting; operates as a slave node with configurable message IDs and filters.

Use Value: Four 10-bit analog inputs and eight GPIOs enable direct connection to common industrial sensors; non-volatile configuration ensures consistent behavior across replacement units.

Smart Lighting Control Node

Embedded Diagnostic Data Logger

Use Scenario: Controlling multi-zone LED brightness and color temperature using PWM outputs while monitoring ambient light and thermal sensors.

IC Role / Device Role / Timing Role: Dual-role device acting as both actuator (via PWM1/PWM2) and sensor interface (AN0–AN3, GP0–GP7); schedules On Bus messages for health telemetry.

Use Value: Integrated 10-bit PWM eliminates external driver ICs; analog threshold detection triggers immediate alert messages on over-temperature events.

Use Scenario: Capturing and forwarding runtime diagnostics (voltage, temperature, error counters) from legacy equipment to a central CAN-based SCADA system.

IC Role / Device Role / Timing Role: CAN bus diagnostic agent - reads internal TEC/REC/EFLG registers and transmits error condition messages (DLC=3) upon warning/passive thresholds.

Use Value: Automatic error messaging (hysteresis-enabled) reduces firmware complexity; 30 µA CAN Sleep mode extends battery life in portable diagnostic tools.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP2515-I/SO	Standalone CAN controller only - requires external MCU for I/O management, A/D, and PWM; SPI interface, no integrated peripherals.	Suitable for designs already using a host microcontroller with available GPIOs and ADC resources.	Select MCP2515-I/SO when system architecture mandates separation of CAN protocol handling and I/O control, and when design flexibility for custom firmware logic is preferred.
MCP25625-H/SO	Integrated CAN controller + 3-channel 12-bit A/D + 2x PWM + LIN support - higher-resolution analog, additional serial interface (LIN), but no non-volatile configuration memory.	Better suited for next-generation nodes requiring higher-precision sensing and multi-protocol support (CAN + LIN).	Choose MCP25625-H/SO when upgrading from MCP25050-E/SL for enhanced analog accuracy, LIN interoperability, or future-proofing against obsolescence.

Compared with MCP2515-I/SO, MCP25050-E/SL eliminates MCU dependency and reduces component count; compared with MCP25625-H/SO, it trades higher A/D resolution and LIN for proven field reliability, zero-firmware operation, and guaranteed drop-in compatibility in legacy CAN networks.

Availability

MCP25050-E/SL is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor networks, and embedded diagnostic systems requiring stable component supply, long-term lifecycle support, and extended temperature performance.

Supply support for MCP25050-E/SL 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 components, and connectivity solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The MCP2502X/5X family was designed specifically as self-contained CAN I/O expanders for distributed embedded systems - targeting applications where minimal firmware, deterministic real-time response, and integration of analog/digital/PWM functions reduce system complexity and cost.

FAQ

Does MCP25050-E/SL require an external microcontroller to operate as a CAN node?

No. MCP25050-E/SL is a fully autonomous CAN v2.0B node with built-in protocol engine, non-volatile configuration memory, and integrated peripherals (A/D, PWM, GPIO). It boots into operational "On Bus" state without host intervention, making it ideal for ultra-low-complexity CAN endpoints where MCU overhead is undesirable.

What is the function of the GP4/VREF− and GP5/VREF+ pins on MCP25050-E/SL?

GP4/VREF− and GP5/VREF+ serve as the negative and positive reference inputs for the four-channel 10-bit A/D converter. They define the full-scale range of analog measurements. When not used for precision referencing, both pins may be configured as general-purpose digital I/Os - a flexibility unique to the MCP25050-E/SL among the MCP2502X/5X family.

Can MCP25050-E/SL generate CAN messages automatically in response to analog input changes?

Yes. MCP25050-E/SL supports threshold detection on all four analog inputs (AN0–AN3). When an input exceeds a user-programmed voltage threshold, it automatically transmits a predefined CAN message (TXID2) - enabling real-time fault reporting without polling or external logic.

How does MCP25050-E/SL handle CAN bus errors such as Bus-Off recovery?

MCP25050-E/SL implements full CAN error management: it enters Bus-Off state when TEC ≥ 256 and recovers automatically after detecting 128 occurrences of 11 consecutive recessive bits. The OPTREG2.ERRE bit allows forcing Listen-Only mode during recovery, and EFLG register reads provide real-time error mode visibility - all handled internally without MCU involvement.

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

Yes. MCP25050-E/SL shares identical 14-pin SOIC and PDIP footprints and pin functions with MCP25020-E/SL, MCP25025-E/SL, and MCP25055-E/SL. Differences are functional (e.g., A/D presence, 1-wire support) rather than mechanical - allowing hardware reuse across variants when firmware and configuration are adapted accordingly.

MCP25050-E/SL Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

Package/Case:: 14-SOIC (0.154", 3.90mm Width)

Packaging:: Tube

Product Status:: Active

Programmable:: Verified

Number of I/O:: 8

Interface:: CAN V2.0b

Interrupt Output:: No

Features:: ADC, EEPROM, POR, PWM

Output Type:: Push-Pull

Current - Output Source/Sink:: 25mA

Clock Frequency:: 25 MHz

Voltage - Supply:: 4.5V ~ 5.5V

Operating Temperature:: -40°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 14-SOIC

MCP25050-E/SL FAQ

1.How can I place an order for MCP25050-E/SL through Aetrix?

Please submit a Request for Quotation (RFQ) for MCP25050-E/SL on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for MCP25050-E/SL reliable?

The price and inventory of MCP25050-E/SL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP25050-E/SL is usually 5 days.

3.What payment methods are accepted for MCP25050-E/SL?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP25050-E/SL transactions.

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4.How is shipping managed for MCP25050-E/SL?

MCP25050-E/SL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MCP25050-E/SL order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for MCP25050-E/SL?

For technical support, including MCP25050-E/SL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP25050-E/SL requirements.

6.How does Aetrix verify that MCP25050-E/SL is sourced from the original manufacturer or authorized distributors?

All MCP25050-E/SL products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MCP25050-E/SL meets industry standards.

7.What is the process for return or replacement of MCP25050-E/SL?

All MCP25050-E/SL units undergo pre-shipment inspection (PSI). If there is an issue with MCP25050-E/SL, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The MCP25050-E/SL part is unused and in its original packaging.

Return procedure for MCP25050-E/SL:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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