1 Features
1• Meets the Requirements of ISO11898-2
• Turbo CAN:
– Short and Symmetrical Propagation Delay
Times and Fast Loop Times for Enhanced
Timing Margin
– Higher Data Rates in CAN Networks
• I/O Voltage Range Supports 3.3-V and 5-V MCUs
• Ideal Passive Behavior When Unpowered
– Bus and Logic Pins are High Impedance (No
Load)
– Power Up and Power Down With Glitch-Free
Operation on Bus
• Protection Features
– HBM ESD Protection Exceeds ±12 kV
– Bus Fault Protection –27 V to 40 V
– Undervoltage Protection on Supply Pins
– Driver Dominant Time Out (TXD DTO)
– SN65HVD257: Receiver-Dominant Time Out
(RXD DTO)
– SN65HVD257: FAULT Output Pin
– Thermal Shutdown Protection
• Characterized for –40°C to 125°C Operation

2 Applications
• 1-Mbps Operation in Highly Loaded CAN
Networks Down to 10-kbps Networks Using TXD
DTO
• Industrial Automation, Control, Sensors, and Drive
Systems
• Building, Security, and Climate Control
Automation
• Telecom Base Station Status and Control
• SN65HVD257: Functional Safety With Redundant
and Multitopology CAN networks
• CAN Bus Standards Such as CANopen,
DeviceNet, NMEA2000, ARNIC825, ISO11783,
and CANaerospace

3 Description
This CAN transceiver meets the ISO1189-2 High
Speed CAN (Controller Area Network) Physical Layer standard. It is designed for data rates in excess of
1 Mbps for CAN in short networks, and enhanced
timing margin and higher data rates in long and
highly-loaded networks. The device provides many
protection features to enhance device and CANnetwork
robustness. The SN65HVD257 device adds
additional features, allowing for easy design of
redundant and multitopology networks with fault
indication for higher levels of functional safety in the
CAN system.