CAT853, CAT863, CAT859, CAT869

6

Doc. No. 3026, Rev. B

© 2007 by Catalyst Semiconductor, Inc.

Characteristics subject to change without notice

CAT853 AND CAT863 OPEN-DRAIN RESET

APPLICATION

The CAT853 and CAT863 features an open-drain

RESET output and therefore need a pull-up resistor on

the output for proper operation, as shown on Figure 5.

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

the pull-up resistor is not critical in most applications,

typical values being between 5kΩ and 10kΩ.

CAT8x3

GND

Power

Supply

RESET

RESET

INPUT

GND

µP

5kΩ

Figure 5. Typical CAT8x3 Open-Drain Circuit Configuration