DEVICE OVERVIEW:

The MCP2551 is a high-speed CAN, fault-tolerant
device that serves as the interface between a CAN
protocol controller and the physical bus. The MCP2551
provides differential transmit and receive capability for
the CAN protocol controller and is fully compatible with
the ISO-11898 standard, including 24V requirements. It
will operate at speeds of up to 1 Mb/s.
Typically, each node in a CAN system must have a
device to convert the digital signals generated by a
CAN controller to signals suitable for transmission over
the bus cabling (differential output). It also provides a
buffer between the CAN controller and the high-voltage
spikes that can be generated on the CAN bus by
outside sources (EMI, ESD, electrical transients, etc.).

Features:
• Supports 1 Mb/s operation
• Implements ISO-11898 standard physical layer
requirements
• Suitable for 12V and 24V systems
• Externally-controlled slope for reduced RFI
emissions
• Detection of ground fault (permanent dominant)
on TXD input
• Power-on reset and voltage brown-out protection
• An unpowered node or brown-out event will not
disturb the CAN bus
• Low current standby operation
• Protection against damage due to short-circuit
conditions (positive or negative battery voltage)
• Protection against high-voltage transients
• Automatic thermal shutdown protection
• Up to 112 nodes can be connected
• High noise immunity due to differential bus
implementation
• Temperature ranges:
- Industrial (I): -40°C to +85°C
- Extended (E): -40°C to +125°C

Operating Modes:
The RS pin allows three modes of operation to be
selected:
• High-Speed
• Slope-Control
• Standby

Absolute Maximum Ratings:
VDD........................................................................7.0V
DC Voltage at TXD, RXD, VREF and VS......................... -0.3V to VDD + 0.3V
DC Voltage at CANH, CANL (Note 1) ........................... -42V to +42V
Transient Voltage on Pins 6 and 7 (Note 2) .................-250V to +250V
Storage temperature ................................................55°C to +150°C
Operating ambient temperature ..................................-40°C to +125°C
Virtual Junction Temperature, TVJ (Note 3)...................-40°C to +150°C
Soldering temperature of leads (10 seconds) ................+300°C
ESD protection on CANH and CANL pins (Note 4) .............6 kV
ESD protection on all other pins (Note 4) .......................4 kV
Note:
1: Short-circuit applied when TXD is high and low.
2: In accordance with ISO-7637.
3: In accordance with IEC 60747-1.
4: Classification A: Human Body Model.