component

MCP2551

Public Made by Adom

by adom

Microchip high-speed CAN transceiver, SOIC-8. Up to 1 Mb/s, pairs with MCP2515, slope control. Datasheet-verified.

componentinterfacecan-buscan-transceiversoic-8microchip
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Made with kicad-footprint-generator 10.0 · KiCad file format 20260206
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MCP2551

Microchip Technology · CAN transceiver (physical layer) · SOIC-8

The physical-layer half of a CAN node, in a SOIC-8: it converts the logic-level TXD/RXD of a CAN controller into the differential CANH/CANL bus signals and back, at up to 1 Mb/s. Pair it with the MCP2515 stand-alone controller (or an MCU's built-in CAN) to build a complete node. The RS pin selects high-speed, slope-controlled, or standby mode; slope control tames EMI on slower buses. It drives a full 112-node bus and survives bus faults and load dumps. Runs from a single 5 V supply.

Pinout

Pin Name Type Function
1 TXD input Transmit Data Input. TTL-compatible input from the CAN controller. A logic Low drives CANH/CANL to the Dominant state; a logic High (or floating) puts the bus in the Recessive state. Internal ~25 kΩ pull-up to VDD. An extended Low >1.25 ms triggers the TXD permanent-dominant detection and disables the drivers.
2 VSS power_in Ground supply pin (0 V reference).
3 VDD power_in Positive supply voltage pin. Operating range 4.5 V to 5.5 V (device drivers also functional between VPOR and 4.5 V but not guaranteed to meet ISO-11898).
4 RXD output Receive Data Output. CMOS-compatible push-pull output driven from the differential receiver. Outputs High when the CAN bus is Recessive and Low when the bus is Dominant. Typically connected to the CAN controller's receive data input.
5 VREF output Reference Output Voltage, nominally VDD/2. Provides a common-mode reference for the CAN controller or external circuitry.
6 CANL bidirectional CAN Low-Level bus I/O. Drives the low side of the differential CAN bus and is internally tied to the receive input comparator. Protected against battery-voltage shorts and high-voltage transients.
7 CANH bidirectional CAN High-Level bus I/O. Drives the high side of the differential CAN bus and is internally tied to the receive input comparator. Protected against battery-voltage shorts and high-voltage transients.
8 RS input Slope-Control Input. Selects one of three modes via an external biasing resistor to VSS or VOL: High-Speed (RS tied to VSS,

Key specifications

Parameter Value
Type High-speed CAN transceiver
Bus speed up to 1 Mb/s
Bus interface CANH / CANL (differential)
Controller interface TXD / RXD (logic level)
Modes high-speed / slope-control / standby (RS pin)
Nodes up to 112 on one bus
Supply voltage 4.5-5.5 V
Package SOIC-8

Ordering variants

Same part, different packaging or reel option.

  • MCP2551-I/SN (SOIC-8)
  • MCP2551T-I/SN (SOIC-8, tape & reel)

CAD (KiCad official)

  • Symbol: Interface_CAN_LIN:MCP2551-I-SN
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOIC-8 (KiCad packages3D)
  • 3D model files: mcp2551-etched.step / mcp2551-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mcp2551.step / mcp2551.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Microchip Technology datasheet (26 pp, sha256 d7c9cc459e1b3763, retrieved 2026-08-17, tier: manufacturer)
  • Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF