CAT853 Datasheet, PDF (6/10 Pages) Catalyst Semiconductor – 3-Pin Microprocessor Power Supply Supervisors

CAT853, CAT863, CAT859, CAT869
VALID RESET WITH V_CC UNDER 1.0 V
To ensure that the CAT859 and CAT869 R¯¯E¯S¯E¯T¯ pin
is in a known state when V_CC is under 1.0 V, a > 10 kΩ
pull-down resistor between R¯¯E¯S¯E¯T¯ pin and GND is
recommended.
Power
Supply
V_CC
CAT8x9
RESET
GND
Figure 3. R¯¯E¯S¯E¯T¯ Valid with V_CC Under 1.0 V
BI-DIRECTIONAL RESET PIN INTERFACING
The CAT859 and CAT869 can interface with µP/µC
bi-directional reset pins by connecting a 4.7 kΩ
resistor in series with the CAT859 and CAT869 reset
output and the µP/µC bi-directional reset pin.
Power
Supply
BUF
Buffered
RESET
V_CC
CAT8x9
RESET
V_CC
µP
RESET
INPUT
GND
Bi-directional
I/O Pin
GND
(For example:
68HC11)
Figure 4. Bi-directional Reset Pin Interfacing
Doc. No. MD-3026 Rev. G
6
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Characteristics subject to change without notice