U6808B - Adronic Components GmbH
U6808B - Adronic Components GmbH
U6808B - Adronic Components GmbH
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<strong>U6808B</strong><br />
Pin Description<br />
Table 1. Pin description<br />
2 (11)<br />
RELAY<br />
GND<br />
ENABLE<br />
WDC<br />
1<br />
2<br />
3<br />
4<br />
Preliminary Information<br />
8<br />
7<br />
6<br />
5<br />
Figure 2. Pinning <strong>U6808B</strong><br />
VS<br />
RIN<br />
WDI<br />
RESET<br />
Pin Name Type Function Logic<br />
1 ÁÁÁÁÁÁ<br />
ÁÁÁÁÁÁ<br />
ÁÁÁÁÁÁ<br />
RELAY ÁÁÁÁÁÁÁ<br />
ÁÁÁÁÁÁÁÁ<br />
ÁÁÁÁÁÁÁÁÁÁÁÁ<br />
ÁÁÁÁÁÁÁ<br />
ÁÁÁÁÁÁÁÁ<br />
ÁÁÁÁÁÁÁÁÁÁÁÁ<br />
ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁ<br />
ÁÁÁÁÁÁ ÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ<br />
ÁÁÁÁÁÁÁÁ<br />
ÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ<br />
ÁÁÁÁÁÁ<br />
Open collector Fail-safe relay driver<br />
Driver off:–––<br />
driver output<br />
driver on: L<br />
2 GND Supply Standard ground 3 ÁÁÁÁÁÁÁÁ<br />
ÁÁÁÁÁÁÁ<br />
ÁÁÁÁÁÁ ÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ<br />
ÁÁÁÁÁÁ<br />
ÁÁÁÁÁÁ ÁÁÁÁÁÁÁ<br />
ENABLE Digital output Negative reset signal Reset: L<br />
4 WDC Analog input<br />
ÁÁÁÁÁÁÁÁÁÁÁÁ<br />
ÁÁÁÁÁÁÁÁÁÁÁÁ<br />
External RC for watchdog timer<br />
ÁÁÁÁÁÁÁÁ<br />
ÁÁÁÁÁÁÁÁ<br />
ÁÁÁÁÁÁ<br />
ÁÁÁÁÁÁ<br />
5 RESET<br />
ÁÁÁÁÁÁÁ<br />
ÁÁÁÁÁÁÁ<br />
Digital output<br />
ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁ<br />
ÁÁÁÁÁÁ ÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁ<br />
ÁÁÁÁÁÁÁÁÁÁÁÁ<br />
ÁÁÁÁÁÁ ÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ<br />
ÁÁÁÁÁÁÁ<br />
ÁÁÁÁÁÁÁÁ<br />
ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁ<br />
ÁÁÁÁÁÁ<br />
ÁÁÁÁÁÁÁÁÁÁÁÁ<br />
ÁÁÁÁÁÁ<br />
ÁÁÁÁÁÁÁÁ<br />
ÁÁÁÁÁÁÁ<br />
Negative reset signal<br />
Reset: L<br />
6 WDI<br />
Digital input Watchdog trigger signal<br />
Pulse sequence<br />
7 RIN<br />
Digital input Activation of relay driver<br />
H: driver on<br />
L: driver off<br />
8 VS Supply 5-V supply<br />
ÁÁÁ<br />
ÁÁÁ<br />
ÁÁÁ<br />
ÁÁÁ<br />
ÁÁÁ<br />
ÁÁÁ<br />
ÁÁÁ ÁÁÁ<br />
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ<br />
ÁÁÁ<br />
ÁÁÁÁÁÁ ÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁ<br />
ÁÁÁ<br />
ÁÁÁÁÁÁ ÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁ<br />
ÁÁÁ<br />
Fail-Safe Functions<br />
A fail-safe IC has to maintain its monitoring function<br />
even if there is a fault condition at one of the pins (e.g.<br />
short circuit). This ensures that a microcontroller system<br />
would not be brought into a critical status. A critical status<br />
Table 2. Table of fault conditions<br />
14019<br />
is reached if the system is not able to switch off the relay<br />
and to give a signal to the �C via ENABLE- and RESET<br />
outputs. The following table shows the fault conditions<br />
for the pins.<br />
ÁÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁÁ ÁÁÁÁÁÁ<br />
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ<br />
ÁÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁÁ ÁÁÁÁÁÁ<br />
Pin Function Short to Vs Short to VBat Short to GND Open Circuit<br />
RELI Digital input to Relay off Relay off Relay on Relay off<br />
activate the fail-<br />
WDI<br />
safe relay<br />
ÁÁÁÁÁÁÁ ÁÁÁÁÁÁ<br />
ÁÁÁÁÁÁÁÁÁÁÁÁÁ<br />
ÁÁÁÁÁÁ<br />
ÁÁÁÁÁÁÁ<br />
Watchdog trigger Watchdog reset<br />
input<br />
ÁÁÁÁÁÁ<br />
ÁÁÁÁÁÁ<br />
ÁÁÁÁÁÁ<br />
Watchdog reset ÁÁÁÁÁÁÁ<br />
ÁÁÁÁÁÁÁ<br />
ÁÁÁÁÁÁÁ<br />
Watchdog reset ÁÁÁÁÁÁ<br />
ÁÁÁÁÁÁ<br />
OSC ÁÁÁÁÁÁÁ ÁÁÁÁÁÁ<br />
ÁÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ<br />
Watchdog reset<br />
Capacitor and<br />
Watchdog reset Watchdog reset Watchdog reset<br />
Watchdog reset<br />
resistor of watchdog<br />
ÁÁÁÁ<br />
ÁÁÁÁ<br />
ÁÁÁÁ<br />
ÁÁÁÁ<br />
ÁÁÁÁ<br />
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ<br />
ÁÁÁÁ<br />
ÁÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁÁ ÁÁÁÁÁÁ<br />
ÁÁÁÁ<br />
TELEFUNKEN Semiconductors<br />
Rev. A1, 03-Dec-97
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