L9788 datasheet(154/264 Pages) STMICROELECTRONICS

154 / 264 page

CAN FD interface

L9788

154/264

DS12308 Rev 4

Figure 70. CAN transceiver test circuit

Conditions:

5.5 V ≤ VB_IN ≤ 18 V, 4.5 V ≤ VDD_CAN ≤ 5.5 V, 5 V ≤ VB_STBY ≤ 18 V, Tj -40 to 175 °C

unless otherwise specified;

CANTX

CANRX

CANH

GND

CAN-FD

TRANSCEIVER

CRX

VCANH

VCANL

VDIFF

GADG2605171108PS

Table 63. CAN threshold related Low supply voltage flag

Symbol

Parameter

Test condition

Min

Typ

Max Unit

VDD_CAN_SUP_LOW

Threshold to detect CAN

Supply low

VDD_CAN decreasing

4.5

4.65

4.8

VB_CAN_TH(1)

Threshold for CAN cell

enable

Not tested For

information only

0.8

2.2

VDD_CAN_SUP_OV

Threshold to detect CAN

Supply over-voltage

VDD_CAN increasing

6.1

6.85

7.5

1. Below this threshold all CAN functions are disabled. In case CAN functionality is requested by application VB_CAN has to

be shorted to VB_stby, otherwise it should be put to GND to disable CAN block.

Table 64. CAN communication operating range

Symbol

Parameter

Test condition

Min

Typ

Max

Unit

VDD_CAN

Supply Voltage operating

range for CAN

transceiver

4.5

5.5

VCANHL,CM

Common mode Bus

voltage



(VCANH + VCANL) / 2

Measured with respect to the

ground of the CAN

transceiver

-12

ITRCV_REC(1)

Transceiver current

consumption during

normal mode from

VDD_CAN, Recessive

State

VTXDC = VTXDCHIGH

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