RXD

CANH

CANL

GND 2

GND 1

V I

(SEE NOTE A )

1 . 5 V

I O

V O

V

I

V

O

2 V

2 .4 V

3 .5 V

VOH

t f

t r

t pHL

1 .5 V

V

OL

90 %

10 %

0 .3 Vcc 1

0 .7 Vcc 1

t pLH

CL(RXD)

A. The input pulse is supplied by a generator having the following characteristics: PRR ≤ 125 kHz, 50% duty cycle,

tr ≤ 6 ns, tf ≤ 6 ns, ZO = 50 Ω.

Figure 7-5. Receiver Test Circuit and Voltage Waveforms

Table 7-1. Receiver Differential Input Voltage Threshold Test

INPUT

OUTPUT

VCANH

VCANL

|VID|

RXD

-11.5 V

-12.5 V

1000 mV

L

VOL

12.5 V

11.5 V

1000 mV

L

-8.55 V

-9.45 V

900 mV

L

9.45 V

8.55 V

900 mV

L

-8.75 V

-9.25 V

500 mV

H

VOH

9.25 V

8.75 V

500 mV

H

-11.8 V

-12.2 V

400 mV

H

12.2 V

11.8 V

400 mV

H

Open

Open

X

H

RL

CANH

CANL

TXD

CL

VO

CL(RXD)

RXD

VI

TXD

VDIFF

70%

500 mV

30%

30%

900 mV

VI

0V

tBIT(BUS)

RXD

VOH

VOL

70%

30%

tBIT(RXD)

tBIT(TXD)

GND1

5 x tBIT

Figure 7-6. tLOOP and CAN FD Timing Parameter Measurement

ISO1044

SLLSFB0A – MARCH 2020 – REVISED JULY 2020

www.ti.com

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