CAT803, CAT809, CAT810
CAT803 OPEn-DRAIn
reSeT
APPLICATIOn
The CAT803 features an open-drain RESET output
and therefore needs a pull-up resistor on the output for
proper operation, as shown on Figure 6. An advantage
of the open-drain output includes the ability to “wire
AND” several outputs together to form an inexpensive
logic circuit. It is also possible to have the pull-up resistor
connected to a different supply which can be higher than
the CAT803 V
CC
pin. The value of the pull-up resistor
is not critical in most applications, typical values being
between 5kΩ and 10kΩ.
Power
Supply
V
CC
5k
V
CC
CAT803
RESET
GND
RESET
INPUT
µP
GND
figure 6. Typical CAT803 Open-Drain Circuit Configuration
Doc. No. 3004, Rev. X
8
© 2007 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
CATALYST [ CATALYST SEMICONDUCTOR ]
