L9779WD-SPI datasheet(85/141 Pages) STMICROELECTRONICS

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L9779WD-SPI

Functional description

140

CAN_H

CAN_L

VCANHdom

CANH voltage level

in dominant state

Active mode;

VTXCAN = VTXCANLOW;

RL = 60 Ω

2.75

4.5

VCANLdom

CANL voltage level

in dominant state

0.5

2.25

VDIFF,domOUT

Differential output

voltage in dominant

state: VCANHdom-

VCANLdom

1.5

VCM

Driver symmetry:

VCANHdom+VCANLdo

RL = 60 Ω; CSPLIT = 4.7 nF;

0.9*

VCANSUP

1.1*

VCANSUP

VCANHrec

CANH voltage level

in recessive state

VTX_CAN = VTX_CANHIGH;

No load

22.5

VCANLrec

CANL voltage level

in recessive state

22.5

VDIFF,recOUT

Differential output

voltage in recessive

state: VCANHrec-

VCANLrec

-50

VCANHL,CM

Common mode bus

voltage

Application info:

Measured with respect to the

ground of each CAN node

-12

+12

IOCANH,dom

CANH output current

in dominant state

Active mode;

VTX_CAN = VTX_CANLOW;

VCANH = 0 V

-100

-75

-45

IOCANL,dom

CANL output current

in dominant state

Active mode;

VTX_CAN = VTX_CANLOW;

VCANL = 5 V

100

ILeakage

Input leakage

current

Unpowered device;

VBUS = 5 V

250

µA

Rin

Internal resistance

Active mode

VTX_CAN = VTX_CANHIGH;

No load

kΩ

Rin,diff

Differential internal

resistance

Active mode & STBY mode;

VTX_CAN = VTX_CANHIGH;

No load

kΩ

Cin

Internal capacitance Guaranteed by design

Cin,diff

Differential internal

capacitance

Guaranteed by design

VTHdom

Differential receiver

threshold voltage

recessive to

dominant state

Active mode

0.9

Table 40. CAN transceiver electrical characteristics (continued)

Symbol

Description

Test conditions

Min

Typ

Max

Unit

L9779WD-SPI Datasheet(PDF) 85 Page - STMicroelectronics

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