SN65HVD255 Datasheet, PDF (1/26 Pages) Texas Instruments – CAN Transceiver with Fast Loop Times for Highly Loaded Networks

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SN65HVD255
SN65HVD256, SN65HVD257
SLLSEA2B – DECEMBER 2011 – REVISED JUNE 2012
CAN Transceivers with Fast Loop Times for Highly Loaded Networks and Features For
Functional Safety Networks
Check for Samples: SN65HVD255, SN65HVD256, SN65HVD257
FEATURES
1
• Meets the Requirements of ISO11898-2
• 'Turbo CAN': Short Propagation Delay Times
and Fast Loop Times; Higher Data Rates in
Network; Enhances System Timing Margins
• I/O Voltage Range Supports 3.3V and 5V MCUs
• Ideal Passive Behavior When Unpowered
– Bus Pins are High Impedance (no load to
operating bus)
– Logic Pins are High Impedance
– Power Up/Down With Glitch Free Operation
On Bus
• Protection Features:
– ESD Protection of Bus Pins
– HBM ESD Protection Exceeds ±12kV
– Bus Fault Protection –27V to 40V
– 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
APPLICATIONS
• 1Mbps Operation in Highly Loaded CAN
Networks Down to 10kbps Networks Using
TXD DTO
• Industrial Automation, Control, Sensors and
Drive Systems
• Building and Climate Control Automation
• Security Systems
• Telecom Base Station Status and Control
• SN65HVD257: Functional Safety With
Redundant and Multi-topology CAN networks
• CAN Bus Standards Such as CANopen,
DeviceNet, NMEA2000, ARNIC825, ISO11783,
CAN Kingdom, CANaerospace
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
megabit per second (Mbps) 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.
NC / VRXD / FAULT (See Note A)
5
FAULT LOGIC
MUX (See Note A)
VCC
OVER
TEMPERATURE
VCC
3
VCC
TXD ¹
DOMINANT
TIME OUT
7 _CANH
6 _CANL
S⁸
MODE SELECT
RXD ⁴
UNDER
VOLTAGE
VCC or VRXD (See Note B)
LOGIC
OUTPUT
DOMINANT
TIME OUT
(See Note B)
2
GND
A. Pin 5 function is device dependent; NC on
SN65HVD255, V_RXD for RXD output level-
shifting device on SN65HVD256, and
FAULT Output on SN65HVD257
B. RXD logic output is driven to 5V V_CC on
5V-only supply devices (SN65HVD255,
SN65HVD257) and driven to V_RXD on
output level-shifting device (SN65HVD256).
C. RXD (Receiver) Dominant State Time Out
is a device dependent option available only
on SN65HVD257.
Figure 1. Functional Block Diagram
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PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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