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

Microchip Technology MCP25055T-I/SL

Name: MCP25055T-I/SL
Brand: Microchip Technology
SKU: MCP25055T-I/SL
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MCP25055T-I/SL

Manufacturer:: Microchip Technology

Category:: I/O Expanders

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

Datasheet:: MCP25055T-I/SL.pdf

Description:: IC XPNDR 25MHZ CAN 14SOIC

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MCP25055T-I/SL from Microchip Technology is a CAN v2.0B I/O expander IC that integrates digital I/O, 4-channel 10-bit ADC, dual 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 temperature range (–40°C to +85°C).

For engineers reviewing the MCP25055T-I/SL datasheet, MCP25055T-I/SL pinout, MCP25055T-I/SL application, or MCP25055T-I/SL equivalent, key selection considerations include its integrated analog/digital peripherals, one-wire CAN bus option, automatic edge- and threshold-triggered messaging, and self-configuring non-volatile setup on power-up.

Technical Context

The MCP25055T-I/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 three prioritized TX buffers. Its finite state machine handles bit-level arbitration, CRC generation (15-bit), error management (TEC/REC counters), and bus-off recovery via 128×11 recessive-bit sequence.

Bit timing is fully configurable via CNF1–CNF3 registers: BRP (1–64), SJW (1–4 TQ), PropSeg (1–8 TQ), PS1 (1–8 TQ), PS2 (2–8 TQ), and sample point at end of PS1. The device supports triple-sampling (SAM=1) and wake-up filter (WAKFIL) for glitch immunity on CAN bus lines.

Key Specifications

Parameter	Value and Actual Design Meaning
CAN Compliance	CAN v2.0B active mode - supports standard and extended identifiers, no synchronization messages required.
Max Bit Rate	1 Mb/s - achieved with minimum nominal bit time of 1 µs using programmable time quanta and segment configuration.
Analog Inputs	Four 10-bit ADC channels - selectable VREF+ and VREF− sources enable precise ratiometric or absolute voltage measurements.
Digital I/O	Eight GPIO pins - individually configurable as input/output with optional transmit-on-pin-change and edge detection.
PWM Outputs	Two independent 10-bit PWM generators - each with programmable frequency and duty cycle for motor control or LED dimming.
Power Supply	2.7V to 5.5V operation - supports wide-range industrial power rails; 10 mA typical active current, 30 µA standby in CAN Sleep mode.
Operating Temp	–40°C to +85°C (Industrial grade) - qualified for automotive body electronics and industrial control environments.

Pinout & Package

14-pin SOIC (150 mil) package with exposed pad not applicable; RoHS-compliant, surface-mount, 3.9 mm × 8.7 mm footprint.

Pin/Terminal	Circuit Role	Design Meaning
GP0/AN0	GPIO / Analog Input 0	Configurable bidirectional I/O; primary analog channel with TTL-compatible input buffer.
GP1/AN1	GPIO / Analog Input 1	Second analog input with identical 10-bit resolution and reference flexibility as AN0.
GP2/AN2/PWM1	GPIO / Analog Input 2 / PWM Output 1	Shared function pin: ADC input or independently programmable PWM signal source.
GP3/AN3/PWM2	GPIO / Analog Input 3 / PWM Output 2	Third analog channel and second PWM output - enables synchronized dual-output control.
GP4/VREF−	GPIO / Analog Reference Negative	Provides low-impedance ground reference for ADC; also usable as general-purpose input/output.
GP5/VREF+	GPIO / Analog Reference Positive	Accepts external reference voltage (up to VDD) for improved ADC accuracy and noise rejection.
VSS	Ground	Primary digital/analog ground return path; must be connected to system common ground plane.
OSC1/CLKIN	Oscillator Input / Clock Input	Accepts crystal (1–20 MHz) or external clock; internal oscillator not present - requires external timing source.
OSC2	Oscillator Output	Drives crystal in parallel-resonant configuration; open-drain when used with external clock.
GP6/CLKOUT	GPIO / Clock Output	Buffered system clock output (divided or undivided); useful for synchronizing peripheral devices.
GP7/RST/VPP	GPIO / Reset Input / Programming Voltage	Active-low reset; also serves as VPP during ICSP™ programming of non-volatile configuration memory.
RXCAN	CAN Receive Input	Differential receiver input; disabled in one-wire mode where TSCAN/TXRXCAN handles both TX/RX.
TXCAN/TXRXCAN	CAN Transmit Output / One-Wire TX/RX	Standard CAN TX driver; reconfigured as bidirectional one-wire bus interface on MCP25055 variants.
VDD	Power Supply	Single 2.7–5.5V supply powers all digital, analog, and CAN transceiver circuitry.

Key Features

Feature	Design Value
Non-volatile Configuration Memory	User-defined settings (filters, masks, I/O directions, thresholds) persist across power cycles and auto-load at startup.
Auto-Transmit on Event	Hardware-triggered messaging on digital edge (GPx change) or analog threshold exceedance - eliminates host polling.
One-Wire CAN Option	Reduces physical bus wiring to single line (TXCAN/TXRXCAN only) - simplifies cabling in space-constrained nodes.
Message Scheduling	On-Bus message transmission at user-defined intervals - enables periodic status reporting without host intervention.
In-Circuit Serial Programming (ICSP™)	Field-upgradable configuration via CAN bus or dedicated ICSP pins - supports remote firmware updates and calibration.

Applications

Automotive Body Control Module	Industrial Sensor Node
Use Scenario: Monitoring door lock status, window position, and interior light switches in a vehicle body controller. IC Role / Device Role / Timing Role: Standalone CAN node collecting discrete inputs and analog sensor data (e.g., ambient light level), transmitting status packets every 100 ms. Use Value: Eliminates need for separate MCU and CAN transceiver; reduces BOM cost and PCB area while maintaining ISO 11898-1 compliance.	Use Scenario: Remote temperature/humidity monitoring in factory HVAC ducts using thermistor and capacitive sensors. IC Role / Device Role / Timing Role: Analog front-end and CAN interface - converts sensor voltages, triggers alerts on threshold breach, and reports via CAN with timestamped payload. Use Value: Self-contained measurement and communication - enables deployment in locations lacking local processing capability or power budget for full microcontrollers.
Smart Lighting Node	Machine Safety Interlock
Use Scenario: Controlling LED brightness and color in architectural lighting systems via DALI-to-CAN gateway. IC Role / Device Role / Timing Role: Dual PWM generator driving constant-current LED drivers; receives dimming commands over CAN and adjusts output in real time. Use Value: Precise 10-bit PWM resolution ensures flicker-free dimming; integrated CAN interface avoids external level-shifting or protocol translation ICs.	Use Scenario: Monitoring emergency stop buttons, light curtains, and door interlocks in CNC machinery. IC Role / Device Role / Timing Role: Safety-critical I/O expander - detects input state changes, validates integrity via CRC, and transmits fault messages within <500 µs latency. Use Value: Hardware-based edge detection and error-condition messaging reduce software dependency and improve response determinism for functional safety applications.

Automotive Body Control Module

Industrial Sensor Node

Use Scenario: Monitoring door lock status, window position, and interior light switches in a vehicle body controller.

IC Role / Device Role / Timing Role: Standalone CAN node collecting discrete inputs and analog sensor data (e.g., ambient light level), transmitting status packets every 100 ms.

Use Value: Eliminates need for separate MCU and CAN transceiver; reduces BOM cost and PCB area while maintaining ISO 11898-1 compliance.

Use Scenario: Remote temperature/humidity monitoring in factory HVAC ducts using thermistor and capacitive sensors.

IC Role / Device Role / Timing Role: Analog front-end and CAN interface - converts sensor voltages, triggers alerts on threshold breach, and reports via CAN with timestamped payload.

Use Value: Self-contained measurement and communication - enables deployment in locations lacking local processing capability or power budget for full microcontrollers.

Smart Lighting Node

Machine Safety Interlock

Use Scenario: Controlling LED brightness and color in architectural lighting systems via DALI-to-CAN gateway.

IC Role / Device Role / Timing Role: Dual PWM generator driving constant-current LED drivers; receives dimming commands over CAN and adjusts output in real time.

Use Value: Precise 10-bit PWM resolution ensures flicker-free dimming; integrated CAN interface avoids external level-shifting or protocol translation ICs.

Use Scenario: Monitoring emergency stop buttons, light curtains, and door interlocks in CNC machinery.

IC Role / Device Role / Timing Role: Safety-critical I/O expander - detects input state changes, validates integrity via CRC, and transmits fault messages within <500 µs latency.

Use Value: Hardware-based edge detection and error-condition messaging reduce software dependency and improve response determinism for functional safety applications.

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 (no I/O, ADC, or PWM); requires external MCU and transceiver; SPI interface only.	Suitable for designs already using a host MCU with SPI; lacks integrated peripherals and autonomous operation capability.	Select when system already includes a capable microcontroller and needs only CAN protocol handling - not a drop-in replacement for MCP25055T-I/SL.
MCP25625-H/SO	Integrated high-speed CAN transceiver + CAN controller; adds VIO pin for mixed-voltage interfacing; no ADC or PWM.	Better suited for noise-sensitive industrial networks requiring galvanic isolation support and robust physical layer; no analog sensing capability.	Choose for new designs needing higher EMC resilience and simplified layout - but requires external ADC/PWM if analog/digital expansion remains necessary.

Compared with MCP2515-I/SO and MCP25625-H/SO, the MCP25055T-I/SL uniquely combines CAN protocol handling, analog acquisition, digital I/O, and autonomous messaging in a single chip - reducing component count and eliminating host MCU dependency for basic distributed control tasks.

Availability

MCP25055T-I/SL is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, smart lighting systems, and machine safety interlocks requiring stable component supply and long-term manufacturability.

Supply support for MCP25055T-I/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 MCP250xx family was designed specifically as self-contained CAN I/O expanders for distributed control nodes - targeting cost-sensitive, space-constrained applications where adding a full microcontroller is impractical.

FAQ

What is the primary function of the MCP25055T-I/SL in a CAN network?

The MCP25055T-I/SL functions as a standalone CAN v2.0B I/O expander, enabling direct connection of digital and analog sensors/actuators to a CAN bus without requiring an external microcontroller. It autonomously handles message filtering, transmission scheduling, edge- and threshold-triggered messaging, and non-volatile configuration loading - making it ideal for simple distributed nodes. The MCP25055T-I/SL integrates all necessary logic, memory, and peripherals to operate as a complete CAN endpoint.

Does the MCP25055T-I/SL include an integrated CAN transceiver?

No, the MCP25055T-I/SL is a CAN protocol controller only and does not include a physical-layer transceiver. It requires an external high-speed CAN transceiver (e.g., MCP2551, TCAN1042) connected to RXCAN and TXCAN pins. However, the MCP25055T-I/SL supports optional one-wire CAN operation using the TXCAN/TXRXCAN pin for simplified bus wiring - still requiring external transceiver support for differential signaling compliance.

How does the MCP25055T-I/SL handle analog input threshold detection?

The MCP25055T-I/SL performs hardware-based analog threshold detection on its four 10-bit ADC channels: when any configured ANx input exceeds a user-defined voltage threshold (set via configuration registers), it automatically generates and transmits a CAN message using TXID2. This occurs without CPU intervention, reducing latency and host processing load. The MCP25055T-I/SL uses internal comparators and programmable hysteresis to prevent chatter near threshold boundaries.

Can the MCP25055T-I/SL be reprogrammed in-system?

Yes, the MCP25055T-I/SL supports In-Circuit Serial Programming (ICSP™) of its non-volatile configuration memory via dedicated GP7/VPP and OSC1/CLKIN pins, and also allows runtime reconfiguration over the CAN bus using Input Messages. This enables field updates of filters, masks, I/O directions, PWM parameters, and analog thresholds - all without removing the MCP25055T-I/SL from the circuit board or halting CAN traffic.

What is the significance of the "T" suffix in MCP25055T-I/SL?

The "T" in MCP25055T-I/SL denotes tape-and-reel packaging - indicating the device is supplied in a continuous carrier tape format suitable for automated SMT placement. This distinguishes it from the tube-packaged variant (MCP25055-I/SL) and confirms industrial-grade qualification (I = –40°C to +85°C) and SOIC-14 (SL) package type. The MCP25055T-I/SL is RoHS-compliant and rated for 1000-cycle reflow per J-STD-020.

MCP25055T-I/SL Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Active

Programmable:: Verified

Number of I/O:: 8

Interface:: CAN (1-Wire)

Interrupt Output:: No

Features:: ADC, EEPROM, POR, PWM

Output Type:: Push-Pull

Current - Output Source/Sink:: 25mA

Clock Frequency:: 25 MHz

Voltage - Supply:: 2.7V ~ 5.5V

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 14-SOIC

MCP25055T-I/SL FAQ

1.How can I place an order for MCP25055T-I/SL through Aetrix?

Please submit a Request for Quotation (RFQ) for MCP25055T-I/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 MCP25055T-I/SL reliable?

The price and inventory of MCP25055T-I/SL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP25055T-I/SL is usually 5 days.

3.What payment methods are accepted for MCP25055T-I/SL?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP25055T-I/SL transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MCP25055T-I/SL?

MCP25055T-I/SL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MCP25055T-I/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 MCP25055T-I/SL?

For technical support, including MCP25055T-I/SL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP25055T-I/SL requirements.

6.How does Aetrix verify that MCP25055T-I/SL is sourced from the original manufacturer or authorized distributors?

All MCP25055T-I/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 MCP25055T-I/SL meets industry standards.

7.What is the process for return or replacement of MCP25055T-I/SL?

All MCP25055T-I/SL units undergo pre-shipment inspection (PSI). If there is an issue with MCP25055T-I/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 MCP25055T-I/SL part is unused and in its original packaging.

Return procedure for MCP25055T-I/SL:

1.Submit a request within 90 days.

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

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