L9924L datasheet(24/84 Pages) STMICROELECTRONICS

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Electrical specifications

L9924L

24/84

DocID028840 Rev 3

tLINpd

TxD-to-LIN/BBS

transmitter

propagation delay

time

tLINpdf=t[0,45*V(LIN/BSS)] -

t[0,5*V(TxD)]

tLINpdr=t[0,55*V(LIN/BSS)] -

t[0,5*V(TxD)]

tLINpd=max(tLINpdr,tLINpdf)

V(A+/B+) = 12 V

(Rbus,Cbus) = (1 kΩ,1 nF),

(660 Ω,6.8 nF),

(500 Ω,10 nF)

µs

tLINpd_sym

tLINpd symmetry

(tLINpdr Vs. tLINpdf)

tLINpd_sym=tLINpdr-tLINpdf

-4

µs

Duty cycle 1

THRec(max)=0,744*V(A+/B+)

THDom(max)=0,581*V(A+/B+)

V(A+/B+)={7, 18}V

tbit =50µs

D1=tbus_rec(min)/(2*tbit)

(Rbus,Cbus) = (1 kΩ,1 nF),

(660 Ω,6.8 nF), (500 Ω,10nF)

0.396

Duty cycle 2

TTHRec(min)=0,284*V(A+/B+)

THDom(min)=0,422*V(A+/B+)

V(A+/B+) = {7.6, 18} V

tbit =50 µs

D2=tbus_rec(max)/(2*tbit)

(Rbus,Cbus) = (1 kΩ,1 nF),

(660 Ω,6.8 nF), (500 Ω,10nF)

0.581

Duty cycle 3

THRec(max)=0,778*V(A+/B+)

THDom(max)=0,616*V(A+/B+)

V(A+/B+) = {7, 18}V

tbit =96µs;

D3 = tbus_rec(min)/(2*tbit);

(Rbus,Cbus) = (1 kΩ,1 nF),

(660 Ω,6.8 nF), (500 Ω,10nF)

0.417

Duty cycle 4

THRec(min)=0,251*V(A+/B+)

THDom(min)=0,389*V(A+/B+)

V(A+/B+) = {7.6, 18}V;

tbit =96µs;

D4 = tbus_rec(max)/(2*tbit);

(Rbus,Cbus) = (1 kΩ,1 nF),

(660 Ω,6.8 nF), (500 Ω,10nF)

0.590

tdom(TXD)

TXD input dominant

time-out

Table 13. Electrical characteristics pin "LIN/BSS" (continued)

Symbol

Parameter

Test condition

Min.

Typ.

Max.

Unit

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