SN65HVD251_06 Datasheet, PDF (1/19 Pages) Texas Instruments – CAN TRANSCEIVER

SN65HVD251
www.ti.com
SLLS545C – NOVEMBER 2002 – REVISED SEPTEMBER 2005
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
(1) _{The signaling rate of a line is the number of voltage transitions}
that are made per second expressed in bps (bits per second).
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 differen-
tial 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 appli-
cations.
Rs, pin 8, selects one of 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 transmit-
ter 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 where the
driver is switched off and the receiver remains active.
The local protocol controller returns the device to the
normal mode when it transmits 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.
D1
GND 2
Vcc 3
R4
8 Rs
7 CANH
6 CANL
5 Vref
function diagram
(positive logic)
V_CC ³
5 _Vref
D1
R_S ⁸
R4
7 _CANH
6 _CANL
PART NUMBER
SN65HVD251D
SN65HVD251DR
SN65HVD251P
ORDERING INFORMATION
PACKAGE
8-pin SOIC (Tube)
8-pin SOIC (Tape & Reel)
8-pin DIP
MARKED AS
VP251
VP251
65HVD251
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 © 2002–2005, Texas Instruments Incorporated