Datasheet

 
    
SLCS115D − DECEMBER 1986 − REVISED JULY 2003
16
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443
• HOUSTON, TEXAS 77251−1443
APPLICATION INFORMATION
1/2 TLC393
To µP Interrupt
Early Power Fail
+
−
+
−
1 kΩ
3.3 kΩ
C
T
(see Note B)
1/2 TLC393
10 kΩ
5 V
5 V
12-V
Sense
R2
R1
V
UNREG
(see Note A)
1 µF
12 V
RESIN
REF C
T
GND
RESET
SENSEV
CC
To µP
Reset
Monitors 5-VDC Rail
Monitors 12-VDC Rail
Early Power Fail Warning
TL7705A
2.5 V
5.1 kΩ
5.1 kΩ
12 V
NOTES: A. V
UNREG
+ 2.5
(R1 +R2)
R2
B. The value of C
T
determines the time delay of reset.
Figure 20. Enhanced Supply Supervisor