L9788 datasheet(160/264 Pages) STMICROELECTRONICS

160 / 264 page

CAN FD interface

L9788

160/264

DS12308 Rev 4

TBit(RXD)

≤ 2Mb/s

Recessive bit symmetry

at RXDC

Rectangular pulse signal TTXDC=

3000ns, high pulse 500ns, low pulse

2500ns

400

500

550

TBit(RXD)

≤ 5Mb/s

Recessive bit symmetry

at RXDC

Rectangular pulse signal

TTXDC = 1200 ns, high pulse 200 ns,

low pulse 1000 ns

120

200

220

TBit(BUS)

≤ 1Mb/s

Recessive bit symmetry

at CAN-Bus

RL = 50 Ω to 65 Ω; 

VDIFF: 0.5 V(falling) - 0.9 V(rising);



CL = 100 pF; CRXD = 15 pF;



TXD rise and fall time = 10 ns



(10% - 90%, 90% - 10%);



Test signal to be applied on the TXD

input of the implementation is a square

wave signal with a positive duty cycle of

1/6 and a period of six times the

nominal recessive bit width



Rectangular pulse signal

TTXDC = 6000 ns, high pulse 1000 ns,

low pulse 5000 ns

800

1000 1100

TBit(BUS)

≤ 2Mb/s

Recessive bit symmetry

at CAN-Bus

Rectangular pulse signal

TTXDC = 3000 ns, high pulse 500 ns,

low pulse 2500 ns

435

500

530

TBit(BUS)

≤ 5Mb/s

Recessive bit symmetry

at CAN-Bus

Rectangular pulse signal



TTXDC = 1200 ns, high pulse 200 ns,

low pulse 1000 ns; Guaranteed by

bench correlation

155

200

210

∆tREC ≤

2Mb/s

Receiver Timing

Symmetry (TBit(RXD) -

TBit(BUS))

Rectangular pulse signal

TTXDC = 3000 ns, high pulse 500 ns,

low pulse 2500 ns; Guaranteed by

bench correlation

-65

∆tREC ≤

5Mb/s

Receiver Timing

Symmetry (TBit(RXD) -

TBit(BUS))

Rectangular pulse signal

TTXDC = 1200 ns, high pulse 200 ns,

low pulse 1000 ns; Guaranteed by

bench correlation

-45

Tdom

CAN permanent

dominant time-out

Guaranteed by scan

500

700

1000

µs

tWUP-RXD

time between WUP(1)

on the CAN bus until

RXD is active (i.e. the

CAN signal is

represented at the RXD

output)

Wake-Up according to ISO11898-5



RXD output enabled; Guaranteed by

scan

0-1

1. Time starts with the end of last dominant phase of the WUP.

Table 75. CAN transceiver delay (continued)

Symbol

Parameter

Test Condition

Min

Typ

Max

Unit

L9788 Datasheet(PDF) 160 Page - STMicroelectronics

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