Rainbow Electronics ATA6624 - Manual (Page 22)

22
4986F–AUTO–07/08
ATA6622/ATA6624/ATA6626
13 Watchdog Oscillator
13.1
Voltage at WD_OSC in
Normal Mode I
WD_OSC
= –200 µA
V
VS
≥
4V
V
WD_OSC
1.13 1.23 1.33 V A
13.2
Positive values of
resistor
R
OSC
34 120 k
Ω
A
13.3 Oscillator period R
OSC
= 34 k
Ω
t
OSC
10.65 13.3 15.97 µs A
13.4 Oscillator period R
OSC
= 51 k
Ω
t
OSC
15.68 19.6 23.52 µs A
13.5 Oscillator period R
OSC
= 91 k
Ω
t
OSC
26.83 33.5 40.24 µs A
13.6 Oscillator period R
OSC
= 120 k
Ω
t
OSC
34.2 42.8 51.4 µs A
14 Watchdog Timing Relative to t
OSC
14.1
Watchdog lead time after
Reset
t
d
7895 cycles A
14.2
Watchdog closed
window
t
1
1053 cycles A
14.3 Watchdog open window t
2
1105 cycles A
14.4
Watchdog reset time
NRES
t
nres
3.2 4 4.8 ms A
15 KL_15 Pin
15.1
High-level input voltage
R
V
= 50 k
Ω
Positive edge initializes a
wake-up
V
KL_15H
4
V
S
+
0.3V
V A
15.2
Low-level input voltage
R
V
= 50 k
Ω
V
KL_15L
–1 +2 V A
15.3 KL_15 pull-down current
V
S
< 27V
V
KL_15
= 27V
I
KL_15
50 60 µA A
15.4 Internal debounce time Without external capacitor Tdb
KL_15
80 160 250 µs A
15.5
KL_15 wake-up time
(R
V
= 50 k
Ω
, C = 100 nF)
R
V
= 50 k
Ω
, C = 100 nF Tw
KL_15
0.4 2 4.5 ms C
16 WAKE Pin
16.1 High-level input voltage V
WAKEH
V
S
– 1V
V
S
+
0.3V
V A
16.2 Low-level input voltage Initializes a wake-up signal V
WAKEL
–1
V
S
–
3.3V
V A
16.3 WAKE pull-up current
V
S
< 27V
V
WAKE
= 0V
I
WAKE
–30 –10 µA A
16.4
High-level leakage
current V
S
= 27V
V
WAKE
= 27V
I
WAKEL
–5 +5 µA A
16.5
Time of low pulse for
wake-up via WAKE pin
V
WAKE
= 0V I
WAKEL
30 70 150 µs A
8. Electrical Characteristics (Continued)
5V < V
S
< 27V, -40°C < Tj < 150°C, unless otherwise specified. All values refer to GND pins
No. Parameters Test Conditions Pin Symbol Min. Typ. Max. Unit Type*
*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter