CANH

CANL

TXD

(see Note A )

C

L

V

I

VOD

GND 1

Vcc

V

I

VOD

500 mV

900 mV

0 V

VOD(D)

0 V

t

TXD_DTO

R

L

A. The input pulse is supplied by a generator having the following characteristics: tr ≤ 6 ns, tf ≤ 6 ns, ZO = 50 Ω.

Figure 7-7. Dominant Time-out Test Circuit and Voltage Waveforms

CANH

CANL

TXD

0V

V

BUS

V

BUS

I

OS

V

BUS

0V

V

BUS

V

BUS

or

I

OS

GND2

200

s

+

±

I

OS

Figure 7-8. Driver Short-Circuit Current Test Circuit and Waveforms

VOL

VOH or

TXD

RXD

VCC 1

60 W

VCC2

GND 1

V CM

GND 2

CL = 15 pF

(includes probe and

jig capacitance )

C = 0.1 F 1%

m

±

CANH

CANL

GND1

C = 0.1 F

m

± 1%

S 1

0 V

VOL

VOH or

GND2

VCC 1

+

Figure 7-9. Common-Mode Transient Immunity Test Circuit

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ISO1044

SLLSFB0A – MARCH 2020 – REVISED JULY 2020

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