CAT803 Datasheet, PDF (8/14 Pages) Catalyst Semiconductor – 3-Pin Microprocessor Power Supply Supervisors

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
CAT803
RESET
GND
5kΩ
V_CC
µP
RESET
INPUT
GND
Figure 6. Typical CAT803 Open-Drain Circuit Configuration
Doc. No. 3004, Rev. X

© 2007 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice