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MAX705C/D Folha de dados(PDF) 8 Page - Maxim Integrated Products

Nome de Peças MAX705C/D
Descrição Electrónicos  Low-Cost, 關P Supervisory Circuits
PDF  12 Pages
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Fabricante Electrônico  MAXIM [Maxim Integrated Products]
Página de início  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX705C/D Folha de dados(HTML) 8 Page - Maxim Integrated Products

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Interfacing to μPs with
Bidirectional Reset Pins
μPs with bidirectional reset pins, such as the Motorola
68HC11 series, can contend with the MAX705–MAX708
RESET
output. If, for example, the RESET output is
driven high and the μP wants to pull it low, indeterminate
logic levels may result. To correct this, connect a 4.7kΩ
resistor between the RESET output and the μP reset I/O,
as in Figure 8. Buffer the RESET output to other system
components.
Figure 5. RESET Valid to Ground Circuit
Figure 7. Monitoring a Negative Voltage
Figure 6. Monitoring Both +5V and +12V
Figure 6. Monitoring Both +5V and +12V
MAX70_
RESET
R1
MAX70_
RESET
R2
R1
+5V
V-
VCC
PFI
GND
MR
PFO
TO µP
100kΩ
100kΩ
2N3904
MR
PFO
+5V
0V
+5V
0V
VTRIP
0V
V-
5 1.25
R1
1.25 VTRIP
R2
,VTRIP 0
–
=
–
<
MAX70_
RESET
130kΩ
1%
PARAMETER
MIN TYP MAX UNIT
+12V Reset
Threshold at +25°C
10.67 10.87 11.50
V
1MΩ
1%
+5V
+12V
VCC
PFI
GND
MR
PFO
TO µP
MAX70_
BUFFERED RESET TO OTHER SYSTEM COMPONENTS
4.7kΩ
VCC
GND
RESET
VCC
GND
RESET
µP
MAX705–MAX708/MAX813L
MAX705–MAX708/MAX813L
Low-Cost, μP Supervisory Circuits
www.maximintegrated.com
Maxim Integrated │ 8



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