Datasheet

 2002-2012 Microchip Technology Inc. DS21446D-page 17
TC646
FIGURE 5-10: TC646 as a Microcontroller Peripheral.
FIGURE 5-11: V
RELEASE
vs. Temperature.
CMOS
Microcontroller
TC646
V
IN
C
F
V
AS
GND
V
DD
V
OUT
FAULT
SENSE
+5V
Analog or Digital
Temperature
Data from one or
more Sensors
I/O0
I/O1
I/O2
I/O3
INT
GND
(Optional)
(MSB)
R
1
110 kΩ
R
2
240 kΩ
R
3
360 kΩ
(LSB)
R
5
1.5 kΩ
+5V
R
6
1 kΩ
R
4
18 k
Ω
R
7
33 kΩ
+5V
R
8
18 kΩ
C
B
.01 μF
+
1 μF
C
B
.01 μF
CMOS
Outputs
Open-Drain
Outputs
Fan
+12V
+5V
C
B
1 μF
+
R
9
800Ω
+5V
R
10
10 kΩ
0.1 μF
2N2222A
R
11
2.2Ω
1
2
3
4
5
6
7
8
(RESET)
V
RELEASE
vs. Temperature
V
RELEASE
(V)
0˚C 25˚C
TEMPERATURE
85˚C
V
DD
= 3.0V
V
DD
= 4.0V
V
DD
= 5.0V
V
DD
= 5.5V
1.0
0.9
0.8
0.7
0.6
0.5
0.4