U6046B / U6047B
Figure 11 shows the input circuit of U6047B. It has an
integrated pull-up resistance (100 k
W
), RF capacitor
(15 PF) and Z-diode (7 V). The circuit reacts to voltages
less than 2 V. The external protective resistance has a
value of 2 k
W
and the push-button switch is connected to
GND. Contact current, I, is calculated as follows:
V
S
when V
Batt
12 V
I
(100 k
W
2 k
W
)
It can be increased by connecting a 5.6 k
W
resistor from
the push-button-switch to V
Batt
as shown in figure 19.
The connecting diodes prevent the current flow to the
input of the Z-diodes when the rocker actuated-switch is
in
open-state
(current-consumption
only
in
standby-mode). If necessary, these diodes can be omitted.
[
)
I
[
0.1 mA
+
Timing Waveform
Diagram 5A
Toggle
Relay
Pin 5
t
3
t
3
Diagram 5B
Pin 2
t
3
t
3
t
3
t
3
t
3
t
d
ON
OFF
Pin 3
t
3
t
3
Pin 4
Relay
Pin 2
t
3
Diagram 5C
t
3
t
3
t
3
t
3
t
3
t
d
Pin 3
ON
OFF
Relay
Pin 4
Pin 2
94 8755
t
d
t
3
Figure 9. Behavior of the relay control output as a function of input condition
2V
VBatt
S
R
20 k
W
7V
15 pF
Pin 3,4,5
–
+
20 k
W
94 8756
V
S
100 k
W
Pin 3,4,5
2 k
W
2V
–
+
15 pF
94 8757
7V
Figure 10. Input circuit U6046B
Figure 11. Input circuit U6047B
TELEFUNKEN Semiconductors
Rev. A2, 03-Feb-97
5 (11)
TEMIC [ TEMIC SEMICONDUCTORS ]
