MCP2551-E - 1Mb/s High-Speed CAN Transceiver, ISO-11898 | Microchip
料号： MCP2551-E ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $1.85 | $1.85 |
| 10 | $1.65 | $16.50 |
| 100 | $1.42 | $142.00 |
| 500 | $1.18 | $590.00 |
| 1,000 | $0.96 | $960.00 |
MCP2551-E 概述
A CAN transceiver is the analog physical-layer bridge of any CAN bus, sitting between a digital CAN controller (such as the MCP2515) and the actual twisted-pair wiring harness. Its primary job is to translate the controller's TXD/RXD CMOS logic into the dominant/recessive differential voltage levels defined by ISO-11898, while absorbing ESD strikes, bus shorts, and load-dump transients so the fragile controller is never exposed to them. As a category, CAN transceivers fall under interface ICs in the broader semiconductor taxonomy of standard logic and bus-interface devices.
Key features of the MCP2551-E include three operating modes (high-speed, slope-control for lower EMI, and standby) selected via the RS pin, a transmitter capable of driving a worst-case 45-Ω load (corresponding to a heavily-loaded bus with 64 nodes), automatic thermal-shutdown protection, and bus fault tolerance meeting the 24V automotive requirement. The VREF pin supplies a 0.5 × VCC reference useful for stabilizing the recessive level.
Architecturally, the die uses a bipolar driver stage for robust bus-side drive strength, with CMOS logic on the controller-side pins. The driver's output impedance and the on-chip slope-control current source are trimmed at the wafer level to give predictable rise/fall times across temperature, which is important in automotive under-hood environments where the bus length and capacitance can vary widely.
Typical applications include in-vehicle networking (OBD-II, body controllers, instrument clusters), industrial CANopen and DeviceNet links, and any 5V microcontroller system needing a standard ISO-11898 CAN port. Designers often pair the MCP2551-E with the MCP2515 controller (the same Microchip family) for a complete CAN node.
When designing with the MCP2551-E, always place a 100 nF decoupling capacitor close to VCC and provide a common-mode choke plus a 120 Ω termination resistor at each end of the bus. The part is now being superseded by the AEC-Q100-qualified MCP2561 for new automotive designs, but remains widely available and fully supported for industrial and legacy systems.
This page consolidates Microchip datasheet specifications, drop-in SOIC-8 alternatives such as the MCP2561 and TI SN65HVD251, and field-level design guidance not found in a quick distributor lookup.
直接替换替代料： MCP2551-E ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： MCP2551-E （相同外形与封装尺寸） ——差异在于 Package.
快速对比工具——选择替代料号进行并排对比：
MCP2561-E/SN
✅ 直接替换📋 参考替代料（不在目录中）
MCP2562-E/SN
✅ 直接替换✓ 有现货
$0.59 / 个
查看数据手册 →MCP2551T-E/SN
✅ 直接替换✓ 有现货
联系询价
查看数据手册 →MCP2551-I/SN
✅ 直接替换📋 参考替代料（不在目录中）
SN65HVD251D
✅ 直接替换📋 参考替代料（不在目录中）
MCP2551-E 规格参数
| Data Rate (Max) | 1 Mb/s |
| CAN Standard | ISO-11898 (including 24V) |
| Supply Voltage (VCC) | 4.5 V to 5.5 V |
| Standby Current (typ) | 275 µA |
| Number of Drivers/Receivers | 1/1 |
| 工作温度 | -40°C to +125°C (E temp grade) |
| Bus Pins Fault Voltage (max) | -40 V to +40 V |
| Common-Mode Voltage Range | -2 V to +7 V |
| 封装 | 8-pin SOIC (SN) |
| 安装类型 | Surface Mount |
| Pin Function (RS) | Slope-control / mode select |
| Pin Function (VREF) | 0.5 × VCC reference |
| Thermal-Shutdown Protection | Yes |
| AEC-Q100 Qualified | No (MCP2561 is the AEC-Q100 upgrade) |
| RoHS 状态 | Compliant |
MCP2551-E 引脚配置
| 引脚 1 | TXD — Transmit data input from CAN controller (CMOS, 5V tolerant) |
| 引脚 2 | VCC — 5V supply input (4.5V to 5.5V) |
| 引脚 3 | RS — Slope-control / mode select (high = standby, low = high-speed, resistor to GND = slope-control) |
| 引脚 4 | RXD — Receive data output to CAN controller (CMOS, 5V) |
| 引脚 5 | VREF — Reference voltage output, nominally 0.5 × VCC |
| 引脚 6 | CANL — Low-side CAN bus line (differential) |
| 引脚 7 | CANH — High-side CAN bus line (differential) |
| 引脚 8 | GND — Ground |
典型应用
MCP2551-E 适用于 7 应用s: In-Vehicle OBD-II / Body Network CAN Nodes, Industrial CANopen and DeviceNet Networks, Embedded HMI and I/O Module CAN Backbones, CAN-Bus-Based Robotics and Motor-Control Links, Smart-Sensor CAN Modules, Industrial IoT Gateways and Edge Bridges, Aftermarket Telematics and Diagnostics Tools.
In-Vehicle OBD-II / Body Network CAN Nodes
The MCP2551-E is widely deployed as the physical-layer interface in automotive OBD-II, body-control and instrument-cluster CAN nodes. Its ±40V bus-pin fault tolerance covers 24V load-dump excursions on 12V vehicle buses, and its 1 Mb/s capability supports both 500 kb/s high-speed CAN and 250 kb/s fault-tolerant CAN used in body modules. The internal thermal-shutdown trips at ~165°C to protect the die during sustained shorts. Pair the part with the Microchip MCP2515 controller for a complete CAN node; engineers usually terminate the bus with 120 Ω at each end and add a common-mode choke for EMI. The MCP2551-E/SN is the default reference for retrofit and aftermarket automotive tooling where AEC-Q100 is not mandatory.
推荐
Industrial CANopen and DeviceNet Networks
In industrial automation the MCP2551-E is a common building block of CANopen and DeviceNet nodes driving PLCs, motor inverters and remote I/O blocks. The RS pin lets the designer trade slew-rate vs EMI for long cables typically found on factory floors, where EN 50321 emissions budgets push designers toward the slowed-edge mode. The device's 8-pin SOIC footprint is friendly to 0805-passive placement machines, and the 5V supply is available from nearly every industrial MCU's voltage rail. Industrial designers should still re-spice to add a TVS diode on the bus pins for 24V surge protection beyond the bare ISO-11898 envelope.
推荐
Embedded HMI and I/O Module CAN Backbones
Embedded human-machine interfaces (HMIs) and remote I/O modules on industrial equipment frequently use the MCP2551-E to attach a 5V Cortex-M or PIC MCU to a CAN backbone running Modbus-over-CAN or CANopen. The 0.5 × VCC VREF output is useful for biasing the bus before connecting the rest of the network, allowing hot-plug of an HMI without disturbing communication. The 1 Mb/s rate enables fast polling for time-critical process variables, while standby mode at 275 µA lets designers hit industrial energy-saving targets when the HMI is not actively polling.
推荐
CAN-Bus-Based Robotics and Motor-Control Links
Compact robotic platforms using a centralized host with multiple distributed motor controllers rely on the MCP2551-E's small SOIC-8 footprint and 1 Mb/s rate to handle high-rate joint-torque feedback loops. The part's ±40V fault rating protects motor-driver ground-bounce events, and the slope-control mode lets designers tighten the bus spectrum for compliance with industrial EMC immunity standards. Pair with a microcontroller such as the dsPIC33EP or a TI C2000 MCU that exposes a CAN peripheral to form a full motion-control node. Use ferrite beads and TVS diodes to harden against motor PWM noise coupling into the bus.
推荐
Smart-Sensor CAN Modules
Smart sensor nodes (temperature, pressure, GPS receivers with CAN output) frequently drop a small 8-pin SOIC transceiver like the MCP2551-E to bridge the 5V sensor DSP to an in-vehicle or in-cab CAN backbone. The standby current of 275 µA supports battery-powered sensor parking mode, while the fast loop delay keeps latency below the CAN arbitration gate. Designers should add a CAN bus shield ground connection at the sensor housing to keep EMI out of the analog front-end; the VREF pin helps bias the bus for the host controller's recessive level detection.
推荐
Industrial IoT Gateways and Edge Bridges
Industrial IoT gateways that aggregate sensor data from CAN-connected machines often use the MCP2551-E as one of multiple bus-side interfaces. At roughly 1.42 USD per unit in 100-piece quantities as of 2026-10-16 it is among the lowest-cost 5V CAN transceivers on the market, and its Microchip second-source ecosystem (the AEC-Q100 upgrade MCP2561) guarantees long-term supply. The slope-control mode is useful in long-cable installations such as wind-turbine pitch systems or substation monitoring, where slow edges reduce ringing on stub branches.
推荐
Aftermarket Telematics and Diagnostics Tools
Aftermarket OBD-II dongles, fleet telematics devices and CAN-bus loggers often build on the MCP2551-E because of its wide availability, 5V single-supply operation and 1 Mb/s data rate compatible with both 500 kb/s and 250 kb/s real-world vehicle networks. The device's 8-pin SOIC footprint eases installation on custom PCB shields for popular SBC platforms (Raspberry Pi, BeagleBone). Use the RS pin in slope-control mode on the diagnostic port to keep EMI under FCC Part 15 Class B limits for consumer telematics hardware.
推荐
推荐产品汇总
工程参考数据： MCP2551-E ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | MCP2561-E/SN | MCP2562-E/SN | MCP2551T-E/SN | MCP2551-I/SN | SN65HVD251D |
|---|---|---|---|---|---|---|
| Package | SOIC-8 (SN) | SOIC-8 (SN) - same | SOIC-8 (SN) - same | SOIC-8 (SN) - same | SOIC-8 (SN) - same | SOIC-8 (D) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Texas Instruments |
| Max Data Rate | 1 Mb/s | 1 Mb/s | 1 Mb/s | 1 Mb/s | 1 Mb/s | 1 Mb/s |
| Supply Voltage | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V |
| Operating Temperature | -40°C to +125°C (E) | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | 0°C to +70°C | -40°C to +85°C |
| Bus Fault Voltage | ±40 V | ±40 V | ±40 V | ±40 V | ±40 V | -7 V to +12 V |
| AEC-Q100 Qualified | No | Yes | Yes | No | No | No |
| VREF Pin | Yes (0.5 × VCC) | Yes (SPLIT pin replaces VREF) | Yes (SPLIT pin replaces VREF) | Yes | Yes | Yes |
| Price (1k qty) | $0.96 | $1.05 | $1.10 | $0.96 | $0.78 | $1.20 |
关键差异点
- 24V-tolerant bus pins covered by single BOM line （对比 MCP2561-E/SN)
- Wide Microchip second-source ecosystem （对比 TI SN65HVD251D)
- Commercial-temp-grade alternates available （对比 MCP2551-I/SN)
设计说明
Place a 100 nF X7R decoupling capacitor within 5 mm of the VCC pin (pin 2) to keep ground-bounce currents out of the digital supply. The CANH and CANL traces must be routed as a 100-Ω differential pair, kept matched to within 0.5 mm of each other, and never routed parallel to switching power traces for more than a few millimetres. Maintain a continuous ground plane under the bus traces to control the differential impedance; a single PCB layer under the SOIC-8 paddle is acceptable since the package has no exposed thermal pad and no thermal via array is required. Keep the CAN bus away from clock-generating crystals and large inductor flybacks.
Do not use the TI SN65HVD230 as a drop-in replacement for the MCP2551-E: the HVD230 is a 3.3V part and will be damaged by a 5V VCC. Use the TI SN65HVD251 (5V) or the Microchip MCP2561 instead. Also ensure the RS pin is not left floating; with no external mode voltage the part's state is undefined and can settle into a high-emission partial state. Tie RS to ground through 10 kΩ for slope-control mode or directly to VCC for standby, or hard-wire to ground for fixed high-speed mode per Microchip datasheet 20001667G.
Implement bus termination only at the two ends of the CAN backbone, never at a stub node. A 120 Ω ±1% resistor in parallel with the bus capacitance keeps the differential rise time controlled. For long (>40 m) backbones split the bus termination to two 60 Ω resistors with a 4.7 nF capacitor to ground in the middle, called split termination, which further attenuates common-mode noise on the pair. Add bidirectional TVS diodes (PESD1CAN or similar) on CANH and CANL near the transceiver connector to clamp ESD and load-dump transients to within ±40V.
合规信息
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified; the Microchip MCP2561 family is the AEC-Q100 upgrade path. Lead-free and halogen-free per Microchip material declarations.
