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參數(shù)資料
| 型號： | TC51N6002ECBTR |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO3 |
| 封裝： | EIAJ, SC-59, SOT-23A, 3 PIN |
| 文件頁數(shù)： | 11/15頁 |
| 文件大?。?/td> | 544K |
| 代理商： | TC51N6002ECBTR |
2002 Microchip Technology Inc.
DS21429B-page 5
TC51
4.0
APPLICATIONS INFORMATION
4.1
Processor RESET Supervisor
Figure 4-1 shows the TC51 used as a processor reset
supervisor. Because the TC51 is available in threshold
settings of 1.6V to 6.0V, the user can choose the reset
single threshold setting best suited to the system power
supply voltage at hand. Also, the 1
A supply current is
significantly lower than its nearest competitor.
low for voltages between 0.7V and VDET+. The TC51
activates its on-board delay timer once the power
supply voltage is within tolerance (i.e., greater than
VDET+). VOUT is released after delay time (TDLY).
Should the power supply voltage momentarily dip
(“brown-out” condition), the TC51 immediately drives
and holds the processor RESET input low. RESET is
released after the power supply voltage is again within
tolerance, and after the delay timer expires. RESET is
driven and held low when power fails (power-off or
“blackout”), and is maintained down low to a supply
voltage of 0.7V.
FIGURE 4-1:
PROCESSOR RESET
SUPERVISOR
FIGURE 4-2:
TC51 OPERATION DURING POWER-UP, BROWN-OUT AND POWER DOWN
TC51
VOUT
GND
VDD
Processor
RESET
R1
47K
0.7V
Power-Up
Steady
State
Operation
TDLY
Time
TDLY
Brown-Out
Power Down
Nominal
Power Supply
Voltage
Threshold
Voltage
(VDET-, VDET+)
VOH
TC51 Output
VOL
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