L9788 datasheet(157/264 Pages) STMICROELECTRONICS

157 / 264 page

DS12308 Rev 4

157/264

L9788

CAN FD interface

263

VDIFF, dom

Differential output voltage

in dominant state:

VCANHdom-VCANLdom

VTXDC = VTXDCLOW; 

RL = 50 Ω to 65 Ω;

1.5

2.0

VDIFF, dom_extR

Differential output voltage

in dominant state:

VCANHdom-VCANLdom

at extended termination

resistor range

VTXDC = VTXDCLOW; 

RL = 45 Ω to 70 Ω;

1.4

3.3

VDIFF, dom_Arb

Differential output voltage

in dominant state:

VCANHdom-VCANLdom

during arbitration

VTXDC = VTXDCLOW; 

RL = 2240 Ω;

1.5

VSYM

Driver Symmetry:

VSYM = (VCANHdom +



VCANLdom)/VDD_CAN

VDD_CAN = 5V

Measured over one 1 MHz

period (1 µs)



RL = 60 Ω (±1%) 

fTXDC = 1MHz (square

wave, 50% duty cycle);



C1 = 4.7nF (±5%)

0.9

1.1

IOCANH,

dom (-3 V)

CANH output current in

dominant state

VTXDC = VTXDCLOW; 

VCANH = -3 V;

-115

IOCANL,

dom (16 V)

CANL output current in

dominant state

VTXDC = VTXDCLOW;

VCANL = 16 V;

115

IOCANH,

dom (40 V)

CANH output current in

dominant state

VTXDC = VTXDCLOW;

VCANH = 40 V;



Vs = 40 V

-5

IOCANL,

dom (40 V)

CANL output current in

dominant state

VTXDC = VTXDCLOW;

VCANL = 40 V;



Vs = 40 V

(0)

115

Table 67. CAN transmitter dominant output characteristics (continued)

Symbol

Parameter

Test condition

Min

Typ

Max Unit

Table 68. CAN transmitter recessive output characteristics, normal mode

Symbol

Parameter

Test condition

Min

Typ

Max

Unit

VCANHrec

CANH voltage

level in recessive

state (Normal

mode)

VTXDC = VTXDCHIGH; No Load

2.5

VCANLrec

CANL voltage level

in recessive state

(Normal mode)

VTXDC = VTXDCHiGH; No Load

2.5

VDIFF, recOUT

Differential output

voltage in

recessive state

(Normal mode):

VCANHrec-VCANLrec

VTXDC = VTXDCHIGH; No Load

-50

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