Datasheet
www.ti.com
FEATURES DESCRIPTION
APPLICATIONS
CANL
R
CANH
Vcc
Rs
GND
Vref
D
1
2
3
4 5
6
7
8
function diagram
(positive logic)
1
7
6
4
53
8
V
CC
V
ref
D
R
S
R
CANH
CANL
SN65HVD251-Q1
SLLS788 – APRIL 2007
CAN TRANSCEIVER
• Qualified for Automotive Applications
The SN65HVD251 is intended for use in applications
employing the Controller Area Network (CAN) serial
• Drop-In Improved Replacement for the
communication physical layer in accordance with the
PCA82C250 and PCA82C251
ISO 11898 Standard. The SN65HVD251 provides
• Bus-Fault Protection of ± 36 V
differential transmit capability to the bus and
• Meets or Exceeds ISO 11898
differential receive capability to a CAN controller at
speeds up to 1 megabit per second (Mbps).
• Signaling Rates
(1)
up to 1 Mbps
• High Input Impedance Allows up to 120
Designed for operation in harsh environments, the
SN65HVD251 Nodes on a Bus
device features crosswire, overvoltage, and loss of
ground protection to ± 36 V. Also featured are
• Bus Pins ESD Protection Exceeds 9 kV (HBM)
overtemperature protection as well as –7-V to 12-V
• Unpowered Node Does Not Disturb the Bus
common-mode range, and tolerance to transients of
• Low-Current Standby Mode: 200 μ A Typical
± 200 V. The transceiver interfaces the single-ended
CAN controller with the differential CAN bus found in
• Thermal Shutdown Protection
industrial, building automation, and automotive
• Glitch-Free Power-Up and Power-Down Bus
applications.
Protection for Hot Plugging
Rs, pin 8, selects one of three different modes of
• DeviceNet™ Vendor ID #806
operation: high-speed, slope control, or low-power
(1)
The signaling rate of a line is the number of voltage
mode. The high-speed mode of operation is selected
transitions that are made per second expressed in bps (bits
by connecting pin 8 to ground, allowing the
per second).
transmitter output transistors to switch as fast as
possible with no limitation on the rise and fall slope.
The rise and fall slope can be adjusted by
• CAN Data Buses
connecting a resistor to ground at pin 8; the slope is
• Industrial Automation
proportional to the pin's output current. Slope control
with an external resistor value of 10 k Ω gives
– DeviceNet Data Buses
~15 V/ μ s slew rate; 100 k Ω gives ~2 V/ μ s slew rate.
– Smart Distributed Systems (SDS™)
If a high logic level is applied to the Rs pin 8, the
• SAE J1939 Standard Data Bus Interface
device enters a low-current standby mode where the
• NMEA 2000 Standard Data Bus Interface
driver is switched off and the receiver remains active.
• ISO 11783 Standard Data Bus Interface
The local protocol controller returns the device to the
normal mode when it transmits to the bus.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2007, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.