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FM1233BDS3X Scheda tecnica(PDF) 3 Page - Fairchild Semiconductor

Il numero della parte FM1233BDS3X
Spiegazioni elettronici  3-Pin 關C Supervisor Circuit
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Produttore elettronici  FAIRCHILD [Fairchild Semiconductor]
Homepage  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

FM1233BDS3X Scheda tecnica(HTML) 3 Page - Fairchild Semiconductor

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FM1233B Rev. D
Pin Descriptions
Circuit Timing
When operating properly with 5V VCC (for example), RESET will
also be about 5V. When VCC starts to fall, RESET will follow it
down as shown. When VCC drops below VTH, RESET drops to
ground (“issues a RESET”) and stays there unless VCC also
falls below its minimum operating voltage, approx. 1V. At this
point, the supervisor loses control, and its output may rise, only
to again follow VCC down to the ground.
When VCC begins to rise, RESET follows it until 1.0V or so is
reached, whereupon the device regains control, RESET is
pulled to ground, etc. When VCC rises above VTH, RESET
comes out of RESET 140 ms later.
If it is required that a lower value than GND + 1.0V is needed
on RESET signal during VCC ≤ 1V, a 100K resistor may be used
on the device output to GND.
Pin Number
Name
Function
1
GND
GROUND
2
RESET
RESET remains LOW while VCC is below VTH, and for
at least 140ms after VCC rises above VTH.
3VCC
3.3V
VTH
1V
GND
3.3V
VTH
1V
GND
VCC
RESET
140ms
(min)


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