U6808B ATMEL Corporation, U6808B Datasheet - Page 11

• Manufacturer Part Number: U6808B
• Description: Special Fail-safe Ic
• Manufacturer: ATMEL Corporation

Figure 9-3.
Figure 9-4.
4707B–AUTO–10/05
ENABLE
ENABLE
RELAY
RELAY
RESET
RESET
V
V
Overvoltage Condition
S
Undervoltage Condition
S
V
V
5 V
0 V
0 V
5 V
0 V
5 V
0 V
5 V
0 V
0 V
5 V
0 V
5 V
0 V
Batt
Batt
Reset debounce time
Reset debounce time
> 5.6 V
< 4.5 V
1
1
st
st
Reset delay
Reset delay
Undervoltage condition
Overvoltage condition
> 120 s
> 120 s
2
2
nd
nd
3 good WDI pulses
3 good WDI pulses
Reset delay
Reset delay
< 120 s
< 120 s
< 4.5 V
> 5.6 V
Don't care
Don't care
U6808B
11