CAT812 Catalyst Semiconductor, CAT812 Datasheet - Page 7

• Manufacturer Part Number: CAT812
• Description: 4-pin Microprocessor Voltage Supervisor
• Manufacturer: Catalyst Semiconductor

VALID RESET WITH V
To ensure that the CAT811 RESET
state when V
resistor
recommended; the value is not critical. For the
CAT812, a pull-up resistor from RESET pin to V
needed.
Figure 3. RESET
BI-DIRECTIONAL RESET PIN INTERFACING
The CAT811/812 can interface with µP/µC bi-
directional reset pins by connecting a 4.7kΩ resistor in
series with the CAT811/812 reset output and the
µP/µC bi-directional reset pin.
© Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
¯¯¯¯¯¯ Valid with V
between
Supply
Power
CC
is under 1.0V, a 100kΩ pull-down
MR
¯¯¯¯¯¯
RESET
CAT811
CC
GND
V
Supply
CC
RESET
UNDER 1.0V
Power
¯¯¯¯¯¯ pin is in a known
CC
pin
Figure 5. Bi-directional Reset Pin Interfacing
under 1.0V
MR
and
CAT811
100kΩ
GND
RESET
Bi-directional I/O Pin
GND
4.7kΩ
CC
is
is
7
RESET
INPUT
Figure 4. RESET Valid with V
CAT811
GND
V
µP
BUF
CC
Supply
Power
Buffered
RESET
(for example: 68HC11)
MR
CAT812
GND
V
CC
RESET
CC
under 1.1V
CAT811, CAT812
Doc. No. MD-3005 Rev. S
100kΩ