D

DRJ

P

1

4

5

8

functiondiagram

(positivelogic)

1

7

6

4

5

3

8

D

R

CANH

CANL

2

3

6

7

R

V

CC

GND

D

CANL

CANH

R

S

V

ref

SN55HVD251

SN65HVD251

www.ti.com

SLLS545E – NOVEMBER 2002 – REVISED MARCH 2010

INDUSTRIAL CAN TRANSCEIVER

Check for Samples: SN55HVD251, SN65HVD251

1

FEATURES

DESCRIPTION

•

Drop-In Improved Replacement for the

The HVD251 is intended for use in applications

PCA82C250 and PCA82C251

employing the Controller Area Network (CAN) serial

communication physical layer in accordance with the

•

Bus-Fault Protection of ±36 V

ISO

11898

Standard.

The

HVD251

provides

•

Meets or Exceeds ISO 11898

differential

transmit

capability

to

the

bus

and

•

differential receive capability to a CAN controller at

speeds up to 1 megabits per second (Mbps).

•

High Input Impedance Allows up to 120 Nodes

on a Bus

Designed for operation in harsh environments, the

•

Bus Pin ESD Protection Exceeds 14 kV HBM

device features cross-wire, overvoltage and loss of

ground protection to ±36 V. Also featured are

•

Unpowered Node Does Not Disturb the Bus

overtemperature protection as well as -7 V to 12 V

•

Low-Current Standby Mode — 200 µA Typical

common-mode range, and tolerance to transients of

•

Thermal Shutdown Protection

±200 V. The transceiver interfaces the single-ended

CAN controller with the differential CAN bus found in

•

Glitch-Free Power-Up and Power-Down Bus

industrial,

building

automation,

and

automotive

Protection For Hot-Plugging

applications.

•

DeviceNet Vendor ID # 806

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

(1)

The signaling rate of a line is the number of voltage

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

transitions that are made per second expressed in bps (bits

mode. The high-speed mode of operation is selected

per second).

by

connecting

pin

8

to

ground,

allowing

the

transmitter output transistors to switch as fast as

APPLICATIONS

possible with no limitation on the rise and fall slope.

•

CAN Data Buses

The rise and fall slope can be adjusted by connecting

•

Industrial Automation

a resistor to ground at pin 8; the slope is proportional

•

SAE J1939 Standard Data Bus Interface

to the pin's output current. Slope control with an

external resistor value of 10 k

Ω gives ~ 15 V/µs slew

•

NMEA 2000 Standard Data Bus Interface

rate; 100 k

Ω gives ~ 2 V/µs 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.

1

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.

PRODUCTION DATA information is current as of publication date.

Copyright © 2002–2010, 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.