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FEATURES

APPLICATIONS

DESCRIPTION

CANL

R

CANH

Vcc

Rs

GND

Vref

D

1

2

3

4

5

6

7

8

function diagram

(positive logic)

1

7

6

4

5

3

8

D

R

CANH

CANL

SN65HVD251

SLLS545C – NOVEMBER 2002 – REVISED SEPTEMBER 2005

CAN TRANSCEIVER

Designed for operation in harsh environments, the

device features cross-wire, over-voltage and loss of

•

Drop-In Improved Replacement for the

ground protection to ±36 V. Also featured are

PCA82C250 and PCA82C251

over-temperature protection as well as -7 V to 12 V

•

Bus-Fault Protection of ±36 V

common-mode range, and tolerance to transients of

•

Meets or Exceeds ISO 11898

±200 V. The transceiver interfaces the single-ended

•

CAN controller with the differential CAN bus found in

industrial, building automation, and automotive appli-

•

High Input Impedance Allows up to 120

cations.

SN65HVD251 Nodes on a Bus

•

Bus Pin ESD Protection Exceeds 14 kV HBM

Rs, pin 8, selects one of three different modes of

operation: high-speed, slope control, or low-power

•

Unpowered Node Does Not Disturb the Bus

mode. The high-speed mode of operation is selected

•

Low-Current Standby Mode — 200 µA Typical

by connecting pin 8 to ground, allowing the transmit-

•

Thermal Shutdown Protection

ter output transistors to switch as fast as possible

•

Glitch-Free Power-Up and Power-Down Bus

with no limitation on the rise and fall slope. The rise

Protection For Hot-Plugging

and fall slope can be adjusted by connecting a

•

DeviceNet Vendor ID # 806

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 k

Ω gives ~ 15 V/us slew rate; 100

that are made per second expressed in bps (bits per second).

k

Ω 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

•

CAN Data Buses

driver is switched off and the receiver remains active.

•

Industrial Automation

The local protocol controller returns the device to the

– DeviceNet™ Data Buses

normal mode when it transmits to the bus.

– Smart Distributed Systems (SDS™)

The

SN65HVD251

may

be

used

in

CAN,

•

SAE J1939 Standard Data Bus Interface

DeviceNet™ or SDS™ applications with the Texas

•

NMEA 2000 Standard Data Bus Interface

Instruments' TMS320F241 and TMS320F243 DSPs

with CAN 2.0B controllers.

•

ISO 11783 Standard Data Bus Interface

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).

ORDERING INFORMATION

PART NUMBER

PACKAGE

MARKED AS

SN65HVD251D

8-pin SOIC (Tube)

VP251

SN65HVD251DR

8-pin SOIC (Tape & Reel)

VP251

SN65HVD251P

8-pin DIP

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.

Copyright © 2002–2005, 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.