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FM1233DDS3X Folha de dados(PDF) 1 Page - Fairchild Semiconductor

Nome de Peças FM1233DDS3X
Descrição Electrónicos  3-Pin 關C Supervisor Circuit
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Fabricante Electrônico  FAIRCHILD [Fairchild Semiconductor]
Página de início  http://www.fairchildsemi.com
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FM1233DDS3X Folha de dados(HTML) 1 Page - Fairchild Semiconductor

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©2002 Fairchild Semiconductor Corporation
1
www.fairchildsemi.com
February 2003
FM1233D Rev. D
FM1233D
3-Pin µC Supervisor Circuit
General Description
The FM1233D is a supervisor circuit that monitors a micropro-
cessor power supply or other system voltage and issues a reset
pulse when a fault condition exists. Several different threshold
voltages are offered to accommodate 5V systems with different
tolerances.
The device features a precision temperature-compensated volt-
age reference and comparator. When VCC falls to the threshold
voltage, a RESET pulse is issued, holding the output in the
active state. When power rises above VTH, the reset remains for
approximately 250 ms to allow the system clock and other cir-
cuits to stabilize. The reset output of FM1233D is of open-drain
active low type.
Features
s Precision monitoring of 5V and lower voltage microprocessor
systems
s VTH values of 4.62V, 4.38V and 4.12V
s Automatic restart of microprocessor after power failure
s 140ms (min) power-on RESET delay (typ.: 256ms)
s Internal 5k
Ω pull-up resistor
s Other reset choices available: 32 to 128ms
s Operating Temperature -40°C to +105°C
s SOT23-3 package
Typical Operating Circuit
Connection Diagram
SOT23-3 Package
1
FM1233D
Controller
2
3
VCC
GND
RESET
GND
VCC
RESET
1
FM1233D
2
3


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