SN65HVD255
SN65HVD256, SN65HVD257
www.ti.com
SLLSEA2C –DECEMBER 2011–REVISED SEPTEMBER 2013
'Turbo' CAN Transceivers for Higher Data Rates and Large Networks Including Features
for Functional Safety
Check for Samples: SN65HVD255, SN65HVD256, SN65HVD257
1
FEATURES
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 CAN-
network robustness. The SN65HVD257 adds
additional features, allowing easy design of redundant
and multi-topology networks with fault indication for
higher levels of functional safety in the CAN system.
•
•
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 3.3V and 5V MCUs
Ideal Passive Behavior When Unpowered
–
Bus and Logic Pins are High Impedance
(no load)
NC / VRXD / FAULT (See Note A)
5
VCC
3
–
Power Up/Down With Glitch Free Operation
On Bus
FAULT LOGIC
MUX (See Note A)
VCC
OVER
TEMPERATURE
•
Protection Features
VCC
–
–
–
–
–
HBM ESD Protection Exceeds ±12kV
Bus Fault Protection –27V to 40V
7
6
CANH
CANL
DOMINANT
TIME OUT
1
8
TXD
Undervoltage Protection on Supply Pins
Driver Dominant Time Out (TXD DTO)
S
MODE SELECT
SN65HVD257: Receiver Dominant Time Out
(RXD DTO)
UNDER
VOLTAGE
–
–
SN65HVD257: FAULT Output Pin
Thermal Shutdown Protection
VCC or VRXD (See Note B)
DOMINANT
TIME OUT
(See Note B)
4
LOGIC
OUTPUT
RXD
•
Characterized for –40°C to 125°C Operation
2
GND
APPLICATIONS
A. Pin 5 function is device dependent; NC on
SN65HVD255, VRXD for RXD output level-
shifting device on SN65HVD256, and
FAULT Output on SN65HVD257
•
1Mbps Operation in Highly Loaded CAN
Networks Down to 10kbps Networks Using
TXD DTO
B. RXD logic output is driven to 5V VCC on
5V-only supply devices (SN65HVD255,
SN65HVD257) and driven to VRXD on
output level-shifting device (SN65HVD256).
•
•
Industrial Automation, Control, Sensors and
Drive Systems
Building, Security and Climate Control
Automation
C. RXD (Receiver) Dominant State Time Out
is a device dependent option available only
on SN65HVD257.
•
•
Telecom Base Station Status and Control
SN65HVD257: Functional Safety With
Redundant and Multi-topology CAN networks
Figure 1. Functional Block Diagram
•
CAN Bus Standards Such as CANopen,
DeviceNet, NMEA2000, ARNIC825, ISO11783,
CANaerospace
1
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