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TC1276 Datasheet(PDF) 4 Page - Microchip Technology

No. de pieza TC1276
Descripción Electrónicos  3-Pin Reset Monitors for 3.3V Systems
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Fabricante Electrónico  MICROCHIP [Microchip Technology]
Página de inicio  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

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TC1275/TC1276/TC1277
DS21383B-page 4
© 2002 Microchip Technology Inc.
3.0
APPLICATIONS INFORMATION
3.1
Operation – Power Monitor
The TC1275/TC1276/TC1277 provide the function
of detecting out-of-tolerance power supply conditions
and warning a processor-based system of impending
power failure.
When VCC is detected as out-of-
tolerance, the RESET signal is asserted. On power-up,
RESET is kept active for approximately 200msec after
the power supply has reached the selected tolerance.
This allows the power supply and microprocessor to
stabilize before RESET is released.
FIGURE 3-1:
Timing Diagram – Power
Up (TC1275/TC1276)
FIGURE 3-2:
Timing Diagram – Power
Down (TC1275/TC1276)
FIGURE 3-3:
Timing Diagram –
Power Up (TC1277)
FIGURE 3-4:
Timing Diagram –
Power Down (TC1277)
VCCTP(MAX)
VCCTP(MIN)
tR
VCCTP
VCC
RESET
tRPU1
VOH
VCC
RESET
VCCTP(MAX)
VCCTP
VCCTP(MIN)
VOL
tRPD1
tF
tR
tRPU2
VOL
VCCTP
VCC
RESET
VCCTP(MAX)
VCCTP(MIN)
tF
tRPD2
VCC
VCCTP(MAX)
VOH
RESET
VCCTP
VCCTP(MIN)
RESET SLEWS WITH VCC


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