MCP2551
High-Speed CAN Transceiver
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
Package Types
PDIP/SOIC
TXD
V
SS
V
DD
RXD
1
8
R
S
CANH
CANL
V
REF
MCP2551
V
DD
V
SS
2
3
4
7
6
5
Block Diagram
V
DD
TXD
Slope
Control
TXD
Dominant
Detect
Thermal
Shutdown
Driver
Control
Power-On
Reset
CANH
0.5 V
DD
GND
Reference
Voltage
Receiver
R
S
RXD
V
REF
CANL
©
2007 Microchip Technology Inc.
DS21667E-page 1
MICROCHIP [ MICROCHIP TECHNOLOGY ]
