NCV7420_15 Datasheet, PDF (13/20 Pages) ON Semiconductor – LIN Transceiver with 3.3V or 5 V Voltage Regulator

NCV7420
AC Characteristics – 3.3 V and 5 V versions − (V_BB = 7 V to 18 V; T_J = −40°C to +150°C; unless otherwise specified.)
Table 9. AC CHARACTERISTICS LIN TRANSMITTER − Pin LIN
Symbol
Parameter
Conditions
Min
Typ
Max Unit
D1
Duty Cycle 1 = t_{BUS_REC(min)} / (2 x t_BIT)
see Figure 23
D2
Duty Cycle 2 = t_{BUS_REC(max)} / (2 x t_BIT)
see Figure 23
D3
Duty Cycle 3 = t_{BUS_REC(min)} / (2 x t_BIT)
see Figure 23
D4
Duty Cycle 4 = t_{BUS_REC(max)} / (2 x t_BIT)
see Figure 23
t_{trx_prop_down}
Propagation Delay of TxD to LIN. TxD
high to low
Normal slope mode
TH_REC(max) = 0.744 x V_BB
TH_DOM(max) = 0.581 x V_BB
t_BIT = 50 ms
V_BB = 7 V to 18 V
Normal slope mode
TH_REC(min) = 0.422 x V_BB
TH_DOM(min) = 0.284 x V_BB
t_BIT = 50 ms
V_BB = 7.6 V to 18 V
Normal slope mode
TH_REC(max) = 0.778 x V_BB
TH_DOM(max) = 0.616 x V_BB
t_BIT = 96 ms
V_BB = 7 V to 18 V
Normal slope mode
TH_REC(min) = 0.389 x V_BB
TH_DOM(min) = 0.251 x V_BB
t_BIT = 96 ms
V_BB = 7.6 V to 18 V
(Note 29)
0.396
0.5
0.417
0.5
0.5
0.581
0.5
0.590
6
ms
t_{trx_prop_up}
Propagation Delay of TxD to LIN. TxD
low to high
(Note 29)
6
ms
t_{fall_norm}
LIN falling edge
Normal slope mode;
V_BB = 12 V; L1, L2
(Note 30)
22.5
ms
t_{rise_norm}
LIN rising edge
Normal slope mode;
V_BB = 12 V; L1, L2
(Note 30)
22.5
ms
t_{sym_norm}
LIN slope symmetry
Normal slope mode;
−4
V_BB = 12 V; L1, L2
(Note 30)
4
ms
t_{fall_norm}
LIN falling edge
Normal slope mode;
V_BB = 12 V; L3 (Note 30)
27
ms
t_{rise_norm}
LIN rising edge
Normal slope mode;
V_BB = 12 V; L3 (Note 30)
27
ms
t_{sym_norm}
LIN slope symmetry
Normal slope mode;
−5
V_BB = 12 V; L3 (Note 30)
5
ms
t_{fall_low}
LIN falling edge
Low slope mode (Note 31);
V_BB = 12 V; L3 (Note 30)
62
ms
t_{rise_low}
LIN rising edge
Low slope mode (Note 31);
V_BB = 12 V; L3 (Note 30)
62
ms
t_wake
Dominant timeout for wake−up via LIN bus
30
150
ms
t_dom
TxD dominant timeout
TxD = low
6
20
ms
29. Values based on design and characterization. Not tested in production.
30. The AC parameters are specified for following RC loads on the LIN bus: L1 = 1 kW / 1 nF; L2 = 660 W / 6.8 nF; L3 = 500 W / 10 nF.
31. Low slope mode is not compliant to the LIN standard.
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