L9788 datasheet(161/264 Pages) STMICROELECTRONICS

161 / 264 page

DS12308 Rev 4

161/264

L9788

CAN FD interface

263

Table 76. Maximum leakage currents on CAN_H and CAN_L, unpowered

Symbol

Parameter

Test condition

Min

Typ

Max

Unit

ILeakage,

CANH

Input leakage

current CANH

Unpowered device;



VCANH = 5V ; VCANL = 5 V;



VDD_CAN, VB_STBY

connected via 0 Ω to GND

VDD_CAN, VB_STBY

connected via 47 kΩ to GND

-10

µA

ILeakage,

CANL

Input leakage

current CANL

Unpowered device;



VCANH = 5V ; VCANL = 5 V;



VDD_CAN, VB_STBY

connected via 0 Ω to GND

VDD_CAN, VB_STBY

connected via 47 kΩ to GND

-10

µA

Table 77. Biasing control timings

Symbol

Parameter

Test condition

Min

Typ

Max

Unit

tfilter

CAN activity filter time

Guaranteed by scan

0.5

1.8

µs

twake

Wake-up time out

Guaranteed by scan

0.35

tSilence

CAN timeout

Guaranteed by scan

600

700

1200

tBIAS

Bias Reaction Time

RL = 60 Ω (±1%); 

C2 = 100 pF (±1%);

C1 = 100 pF (±1%);



VTXDC = VTXDCLOW;



50% VDIFF; VSYM = 0.1(1);

Transition bias inactive to

bias active; Guaranteed by

scan

220

µs

tcansuphigh CAN_SUP_LOW filter time Guaranteed by scan

8.5

11.5

µs

tcansuplow VDD_CAN_OV filter time

Guaranteed by scan

8.5

11.5

µs

tdom_pulse Dominant interrupt pulse

Guaranteed by scan

47.6

64.4

µs-

Measured from the start of a dominant-recessive-dominant sequence (each phase 6μs) until VSYM ≥ 0.1

Table 78. Standby current consumption (Battery line @RT)

Total quiescent current consumption(1)

Max value

Unit

EOT disabled and CAN block enabled, CAN wake up disabled

µA

EOT disabled and CAN block enabled, CAN wake up enabled

µA

EOT enabled and CAN block enabled, CAN wake up disabled

µA

EOT enabled and CAN block enabled, CAN wake up enabled

µA

1. L9788 Total quiescent current consumption at pins VB_STBY, VB_IN, VB_IN_SW, VB_SENSE, CP (through 100 nF

capacitor), VB_CAN, MRD, RLY1, LED2, STR2_DRN, PDR1_DRN connected to battery. The total current was measured

at battery line @RT.

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