NCV7425
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13
Table 8. 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.
Symbol
Parameter Conditions Min Typ Max Unit
AC CHARACTERISTICS LIN TRANSMITTER
D1
Duty Cycle 1 = t
BUS_rec(min)
/
(2 x t
Bit
) see Figure 24
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
0.396 0.5
D2 Duty Cycle 2 = t
BUS_rec(max)
/
(2 x t
Bit
) see Figure 24
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
0.5 0.581
D3 Duty Cycle 3 = t
BUS_rec(min)
/
(2 x t
Bit
) see Figure 24
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
0.417 0.5
D4 Duty Cycle 4 = t
BUS_rec(max)
/
(2 x t
Bit
) see Figure 24
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
0.5 0.590
t
fall_norm
LIN falling edge Normal slope mode; V
BB
= 12 V;
L1, L2 (Note 18)
22.5
ms
t
rise_norm
LIN rising edge Normal slope mode; V
BB
= 12 V;
L1, L2 (Note 18)
22.5
ms
t
sym_norm
LIN slope symmetry Normal slope mode; V
BB
= 12 V;
L1, L2 (Note 18)
−4 4
ms
t
fall_norm
LIN falling edge Normal slope mode; V
BB
= 12 V;
L3 (Note 18)
27
ms
t
rise_norm
LIN rising edge Normal slope mode; V
BB
= 12 V;
L3 (Note 18)
27
ms
t
sym_norm
LIN slope symmetry Normal slope mode; V
BB
= 12 V;
L3 (Note 18)
−5 5
ms
t
fall_low
LIN falling edge Low slope mode (Note 19);
V
BB
= 12 V; L3 (Note 18)
62
ms
t
rise_low
LIN rising edge Low slope mode (Note 19);
V
BB
= 12 V; L3 (Note 18)
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
V
CC_UV_deb
V
CC
undervoltage detection
debounce time
1.5 5 10
ms
RSTN
ext
Extension time of RSTN Low
pulse beyond V
CC
undervoltage
3 6 10 ms
AC CHARACTERISTICS LIN RECEIVER
t
rec_prop_down
Propagation delay of receiver
falling edge
0.1 6
ms
t
rec_prop_up
Propagation delay of receiver
rising edge
0.1 6
ms
t
rec_sym
Propagation delay symmetry t
rec_prop_down
− t
rec_prop_up
−2 2
ms
18.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.
19.Low slope mode is not compliant to the LIN 1.3 or LIN 2.0/2.1 standard.
