MCP2551 is a high-speed CAN device produced by Microchip Technology Inc. It complies with the ISO-11898 standard and supports a data rate of 1 Mb/s. It is suitable for 12V and 24V systems and features slope external control, automatic detection of ground errors in the TXD input, power-on reset, and undervoltage protection. Additionally, it has short-circuit protection, high-voltage transient protection, and automatic thermal shutdown protection, and can connect up to 112 nodes.
The MCP2551 is a fault‑tolerant high‑speed CAN transceiver that provides differential transmit and receive functions compliant with ISO‑11898. It supports both 12 V and 24 V systems, offers up to 1 Mbit/s bus speed, and can connect up to 112 nodes on a single CAN bus.
The device features three selectable operation modes (high‑speed, slope‑control, standby), internal protections such as thermal shutdown, short‑circuit and high‑voltage transient protection, and low‑current standby operation. Electrical specifications, pin descriptions, and absolute maximum ratings are detailed in the following sections. This manual is written in Chinese.
| Maximum bus speed | 1 Mbit/s |
|---|---|
| Maximum number of nodes | 112 |
| Supply voltage (VDD) | 4.5 V to 5.5 V |
| Industrial temperature range | -40 °C to +85 °C |
| Extended temperature range | -40 °C to +125 °C |
| Operation modes | High‑speed, slope‑control, standby |
| TXD low‑level detection time | ≥ 1.25 ms |
It can connect up to 112 nodes.
The device supports high‑speed, slope‑control, and standby modes.
The recommended supply voltage (VDD) is 4.5 V to 5.5 V.
The transceiver operates up to 1 Mbit/s.