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AZ7045Z Datasheet(PDF) 9 Page - BCD Semiconductor Manufacturing Limited

Part # AZ7045Z
Description  VOLTAGE DETECTOR
Download  12 Pages
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Manufacturer  BCDSEMI [BCD Semiconductor Manufacturing Limited]
Direct Link  http://www.bcdsemi.com
Logo BCDSEMI - BCD Semiconductor Manufacturing Limited

AZ7045Z Datasheet(HTML) 9 Page - BCD Semiconductor Manufacturing Limited

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AZ70XX
Preliminary Datasheet
9
Jul. 2005 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
VOLTAGE DETECTOR
AZ70XX
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
+
Figure 12 is a typical timing waveform for AZ70XX
during power-up and temporary power-down period.
Here is some explanations for AZ70XX's operation.
1. During power-up period, VOUT will remain
undefined until VCC rises above VOPR (typically
0.8V). After that moment, the output will become
valid and will be at its logic low state while
VOPR<VCC<VS for power-up operating.
2. After a delay time of tpLH from the moment
VCC>VS, the VOUT will be at its logic high state. In
general, VOUT is dependent upon the voltage that the
pull up resistor connected to.
3. During power-down, after a delay time of tpHL
from the moment VCC<VS-VHYS, VOUT will be at its
logic low state. 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).
4. VOUT will be at its logic low state while VS-
VHYS>VCC>VOPR for power-down operating.
5. After VCC falls below VOPR, the output is
undefined.
Operating Diagram (Continued)
Typical Applications


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