CAT809 CATALYST [Catalyst Semiconductor], CAT809 Datasheet - Page 8

• Manufacturer Part Number: CAT809
• Description: 3-Pin Microprocessor Power Supply Supervisors
• Manufacturer: CATALYST [Catalyst Semiconductor]

To ensure that the CAT809 RESET pin is in a known state when V
between RESET pin and GND is recommended; the value is not critical. For the CAT810, a pull-up resistor from
RESET pin to V
The CAT809/810 can interface with P/ C bi-directional reset pins by connecting a 4.7 k resistor in series with the
CAT809/810 reset output and the P/ C bi-directional reset pin.
Doc. No. 3004, Rev. S
Power
Supply
Power
Supply
RESET
RESET
RESET
RESET
RESET
CC
is needed.
GND
V CC
RESET
CAT809
GND
V CC
RESET
Bi-directional I/O Pin
4.7k
100k
8
Power
Supply
RESET
INPUT
BUF
CC
GND
µP
is under 1.0 V, a 100 k
Buffered
RESET
(For example: 68HC11)
GND
V CC
RESET
pull-down resistor
Patent Pending
100k