L99DZ120 datasheet(49/162 Pages) STMICROELECTRONICS

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DocID029145 Rev 4

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L99DZ120

Electrical specifications

161

The voltages are referred to ground and currents are assumed positive, when the current

flows into the pin. 6V < VS < 28V; Tj = -40 °C to 150 °C, unless otherwise specified.

1. 105°C is the maximum junction temperature of an unpowered device according to this test condition within the specified

ambient temperature range

2. Used for device test only

Table 29. LIN transceiver timing

Symbol

Parameter

Test condition

Min.

Typ.

Max.

Unit

tRXpd

Receiver propagation

delay time

tRXpd = max(tRXpdr, tRXpdf);

tRXpdf = t(0.5 VRXD)-t(0.45 VLIN);

tRXpdr = t(0.5 VRXD)-t(0.55 VLIN);

VSREG = 12 V; CRXD=20 pF;

Rbus = 1 kΩ, Cbus = 1 nF; Rbus = 660 Ω,

Cbus = 6.8 nF; Rbus = 500 Ω,

Cbus = 10 nF

μs

tRXpd_sym

Symmetry of receiver

propagation delay time

(rising vs. falling edge)

tRXpd_sym = tRXpdr - tRXpdf; VSRE = 12 V;

Rbus = 1 kΩ; Cbus = 1 nF; CRXD = 20 pF

-2

μs

Duty Cycle 1

THRec(max) = 0.744 * VSREG;

THDom(max) = 0.581 * VSREG;

VSREG = 7 to 18 V, tbit = 50 µs;

D1 = tbus_rec(min) / (2 x tbit);

Rbus = 1 kΩ, Cbus = 1 nF; Rbus = 660 Ω,

Cbus = 6.8 nF; Rbus = 500 Ω,

Cbus = 10 nF

0.396

Duty Cycle 2

THRec(min) = 0.422* VSREG;

THDom(min) = 0.284* VSREG;

VSREG = 7.6 to 18 V, tbit = 50 µs;

D2 = tbus_rec(max) / (2 x tbit);

Rbus = 1 kΩ, Cbus = 1 nF; Rbus = 660 Ω,

Cbus = 6.8 nF; Rbus = 500 Ω,

Cbus = 10 nF

0.581

Duty Cycle 3

THRec(max) = 0.778* VSREG;

THDom(max) = 0.616* VSREG; VSREG = 7

to 18 V, tbit = 96 µs;

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

Rbus = 1 kΩ, Cbus = 1 nF; Rbus = 660 Ω,

Cbus = 6.8 nF; Rbus = 500 Ω,

Cbus = 10 nF

0.417

Duty Cycle 4

THRec(min) = 0.389* VSREG;

THDom(min) = 0.251* VSREG;

VSREG = 7.6 to 18 V, tbit = 96 µs;

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

Rbus = 1 kΩ, Cbus = 1 nF; Rbus = 660 Ω,

Cbus = 6.8 nF; Rbus = 500 Ω,

Cbus = 10 nF

0.590

tdom(TXDL)

TXDL dominant time-

out

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