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AZ7025RTR-E1 Datasheet(PDF) 9 Page - BCD Semiconductor Manufacturing Limited

Part # AZ7025RTR-E1
Description  VOLTAGE DETECTOR
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Manufacturer  BCDSEMI [BCD Semiconductor Manufacturing Limited]
Direct Link  http://www.bcdsemi.com
Logo BCDSEMI - BCD Semiconductor Manufacturing Limited

AZ7025RTR-E1 Datasheet(HTML) 9 Page - BCD Semiconductor Manufacturing Limited

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BCD Semiconductor Manufacturing Limited
VOLTAGE DETECTOR
AZ70XX
Data Sheet
Oct. 2011 Rev. 2. 2
Figure 13. Low Voltage Indicator
Figure 14. CPU Resetting Circuit
1
3
2
V
CC
AZ70XX
OUT
GND
LED
V
CC
R1
220
V
CC +5V
R1
3.3k
1
3
2
V
CC
AZ70XX
OUT
GND
CPU
V
CC
GND
RESET
C1
1
µF
+
Operating Diagram (Continued)
Typical Applications
Figure 12 is a typical timing waveform for AZ70XX.
In normal steady-state operation when VCC>VDET-,
the output will be in a logic high state and VOUT is
dependent upon the voltage that the pull-up resistor
connected to.
Here is some explanations for AZ70XX's operation.
1. When the input voltage VCC falls below VDET-, the
output will pull down to logic low after a delay time of
tpHL. In general, at rated output current and VCC,
VOUT can be pulled down to a voltage as low as within
0.4V from GND. (See the Electrical Characteristics
section). The voltage level VDET- means the detect
voltage.
2. The output, VOUT, will stay valid until VCC falls
below the minimum operating voltage, VOPR (0.8V
typical). Below minimum operating voltage, the out-
put is undefined.
3. During power-up, VOUT will remain undefined until
VCC rises above VOPR, at which time the output will
become valid. VOUT will be in its active low state
while
VOPR<VCC<VDET+ (VDET+=VDET-+VHYS).
VDET+ is the release voltage. VHYS means the hystere-
sis voltage and is the difference voltage between the
VDET+ and VDET-.
4. When VCC rises above VDET+, the output will be in
its inactive state. After a delay time of tpLH, VOUT
will be in its logic high state .


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