PCA82C251T/YM,112 参数 Datasheet PDF下载

NXP Semiconductors

PCA82C251

CAN transceiver for 24 V systems

LOW level. The microcontroller should react to this condition by switching the transceiver

back to normal operation (via pin 8). Because the receiver is slower in Standby mode, the

first message will be lost at higher bit rates.

Table 4.

Supply

4.5 V to 5.5 V

4.5 V to 5.5 V

4.5 V < V

CC

< 5.5 V

0 V < V

CC

< 4.5 V

[1]

[2]

Truth table of the CAN transceiver

TXD

0

X

floating

CANH

HIGH

floating if

V

Rs

> 0.75V

CC

floating

CANL

LOW

floating

Bus state

dominant

recessive

RXD

0

1

X

X

1 (or floating) floating

floating if

floating

V

Rs

> 0.75V

CC

floating

floating

If another bus node is transmitting a dominant bit, then RXD is logic 0.

X = don’t care.

Table 5.

Pin Rs summary

Mode

Standby

Slope control

High-speed

Resulting voltage or current at pin Rs

I

Rs

< 10

A

0.4V

CC

< V

Rs

< 0.6V

CC

I

Rs

< 500

A

Condition forced at pin Rs

V

Rs

> 0.75V

CC

10

A

<

I

Rs

< 200

A

V

Rs

< 0.3V

CC

9. Limiting values

Table 6.

Limiting values

In accordance with the Absolute Maximum Rating System (IEC 60134). All voltages are referenced to pin 2; positive input

current.

Symbol Parameter

V

CC

V

n

V

6

supply voltage

DC voltage at pins 1, 4, 5 and 8

DC voltage at pin 6 (CANL)

0 V < V

CC

< 5.5 V; TXD HIGH or floating

0 V < V

CC

< 5.5 V; no time limit

0 V < V

CC

< 5.5 V; no time limit

V

7

V

trt

T

stg

T

amb

T

vj

V

ESD

DC voltage at pins 7 (CANH)

transient voltage at pins 6 and 7

storage temperature

ambient temperature

virtual junction temperature

electrostatic discharge voltage

Conditions

Min

0.3

0.3

36

36

36

36

200

55

40

40

2500

250

Max

+7.0

+36

+36

+36

+36

+200

+150

+125

+150

+2500

+250

Unit

V

V

V

V

V

V

C

C

C

V

V

V

CC

+ 0.3 V

0 V < V

CC

< 5.5 V; no time limit

see

[1]

[2]

[3]

TXD is LOW. Short-circuit protection provided for slew rates up to 5 V/s for voltages above +30 V.

Short-circuit applied when TXD is HIGH, followed by TXD switched to LOW.

In accordance with

“IEC 60747-1”.

An alternative definition of virtual junction temperature is: T

vj

= T

amb

+ P

d



R

th(vj-a)

, where R

th(j-a)

is a

fixed value to be used for the calculation of T

vj

. The rating for T

vj

limits the allowable combinations of power dissipation (P

d

) and ambient

temperature (T

amb

).

Classification A: human body model; C = 100 pF; R = 1500

;

V =

2000

V.

Classification B: machine model; C = 200 pF; R = 25

;

V =

200

V.

All information provided in this document is subject to legal disclaimers.

© NXP B.V. 2011. All rights reserved.

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PCA82C251

Product data sheet

Rev. 04 — 25 August 2011

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