SN65HVD251 Datasheet, PDF (1/19 Pages) Texas Instruments – CAN TRANSCEIVER

www.ti.com
SN65HVD251
SLLS545B – NOVEMBER 2002 – REVISED SEPTEMBER 2003
CAN TRANSCEIVER
FEATURES
• Drop-In Improved Replacement for the
PCA82C250 and PCA82C251
• Bus-Fault Protection of ±36 V
• Meets or Exceeds ISO 11898
• Signaling Rates⁽¹⁾ up to 1 Mbps
• High Input Impedance Allows up to 120
SN65HVD251 Nodes on a Bus
• Bus Pin ESD Protection Exceeds 14 kV HBM
• Unpowered Node Does Not Disturb the Bus
• Low Current Standby Mode . . . 200 µA Typical
• Thermal Shutdown Protection
• Glitch-Free Power-Up and Power-Down Bus
Protection For Hot-Plugging
• DeviceNet Vendor ID # 806
APPLICATIONS
• CAN Data Buses
• Industrial Automation
– DeviceNet™ Data Buses
– Smart Distributed Systems (SDS™)
• SAE J1939 Standard Data Bus Interface
• NMEA 2000 Standard Data Bus Interface
• ISO 11783 Standard Data Bus Interface
DESCRIPTION
The SN65HVD251 is intended for use in applications employing the Controller Area Network (CAN) serial
communication physical layer in accordance with the ISO 11898 Standard. The SN65HVD251 provides
differential transmit capability to the bus and differential receive capability to a CAN controller at speeds up to 1
megabits per second (Mbps).
Designed for operation in harsh environments, the device features cross-wire, over-voltage and loss of ground
protection to ±36 V. Also featured are over-temperature protection as well as -7 V to 12 V common-mode range,
and tolerance to transients of ± 200 V. The transceiver interfaces the single-ended CAN controller with the
differential CAN bus found in industrial, building automation, and automotive applications.
Rs, pin 8, provides for three different modes of operation: high-speed, slope control, or low-power mode. The
high-speed mode of operation is selected by connecting pin 8 to ground, allowing the 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 connecting a resistor to ground at pin 8; the slope is proportional to the pin's output current. Slope
control with an external resistor value of 10 kΩ gives ~ 15 V/us slew rate; 100 kΩ gives ~ 2 V/us slew rate.
If a high logic level is applied to the Rs pin 8, the device enters a low-current standby mode during which the
driver is switched off and the receiver remains active . The local protocol controller reverses this low-current
standby mode when it needs to transmit to the bus.
The SN65HVD251 may be used in CAN, DeviceNet™ or SDS™ applications with the Texas Instruments'
TMS320F241 and TMS320F243 DSPs with CAN 2.0B controllers.
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.
DeviceNet is a trademark of Allen-Bradley.
SDS is a trademark of Honeywell.
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.
Copyright © 2002–2003, Texas Instruments Incorporated