Datasheet

2010-2011 Microchip Technology Inc. DS22269B-page 23
MCP65R41/6
4.3.1 NON-INVERTING CIRCUIT
Figure 4-4 shows a non-inverting circuit for single-
supply applications using just two resistors. The
resulting hysteresis diagram is shown in Figure 4-5.
FIGURE 4-4: Non-Inverting Circuit with
Hysteresis for Single-Supply.
FIGURE 4-5: Hysteresis Diagram for the
Non-Inverting Circuit.
The trip points for Figures 4-4 and 4-5 are:
EXAMPLE 4-1:
4.3.2 INVERTING CIRCUIT
Figure 4-6 shows an inverting circuit for single-supply
using three resistors. The resulting hysteresis diagram
is shown in Figure 4-7.
FIGURE 4-6: Inverting Circuit with
Hysteresis.
FIGURE 4-7: Hysteresis Diagram for the
Inverting Circuit.
V
REF
V
IN
V
OUT
V
DD
R
1
R
F
+
-
V
PU
R
PU
*
V
REF
* Pull-up resistor required for the MCP65R46 only.
V
OUT
High-to-Low Low-to-High
V
DD
V
OH
V
OL
V
SS
V
SS
V
DD
V
THL
V
TLH
V
IN
V
TLH
V
REF
1
R
1
R
F
-------+



V
OL
R
1
R
F
-------



=
V
THL
V
REF
1
R
1
R
F
-------+



V
OH
R
1
R
F
-------



=
Where:
V
TLH
= trip voltage from low to high
V
THL
= trip voltage from high to low
V
IN
V
OUT
V
DD
R
2
R
F
R
3
V
REF
V
PU
R
PU
*
* Pull-up resistor required for the MCP65R46 only.
V
OUT
High-to-LowLow-to-High
V
DD
V
OH
V
OL
V
SS
V
SS
V
DD
V
TLH
V
THL
V
IN