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G682H18SQL1U 数据表(PDF) 13 Page - Global Mixed-mode Technology Inc

部件名 G682H18SQL1U
功能描述  Low Voltage Reset IC
PDF  18 Pages
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制造商  GMT [Global Mixed-mode Technology Inc]
网页  http://www.gmt.com.tw
标志 GMT - Global Mixed-mode Technology Inc

G682H18SQL1U 数据表(HTML) 13 Page - Global Mixed-mode Technology Inc

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Ver: 0.8
Feb 27, 2013
TEL: 886-3-5788833
http://www.gmt.com.tw
13
G682/G683
Global Mixed-mode Technology
Functional Diagram
Figure 2
Separated Sense Pin
Since the sense pin is separated from power supply, it
allows the IC to monitor added power supply. Using the
IC with the sense pin separated from power supply
enables output to maintain the state of detection even
when voltage of the monitored power supply drops to
0V.
Adjustable Reset Threshold (G68_ _09T_)
Since the VSEN pin of G68_ _09T_ is high impedance,
it can be used to adjust reset threshold. Connect two
resistors in series from the detected power to GND and
the divided voltage is compared to reset threshold
(0.788V typical). (Figure 3)
The voltage threshold is:
2
R
2
R
1
R
788
0
Vth
)
(
.
+
×
=
Figure 3
VREF
RESET
(RESET)
CD
+
OUTPUT
BUFFER
VCC
VREF
RESET
(RESET)
CD
+
OUTPUT
BUFFER
VCC
VSEN
Detect
Voltage
Internal Resistor Divide Sense Voltage
External Restor Divide Sense Voltage (only G68__09T_)
VREF
RESET
(RESET)
CD
+
OUTPUT
BUFFER
VCC
VREF
RESET
(RESET)
CD
+
OUTPUT
BUFFER
VCC
VSEN
Detect
Voltage
Internal Resistor Divide Sense Voltage
External Restor Divide Sense Voltage (only G68__09T_)
*The 100kΩ pull up resistor is only for G683L
VCC
VSEN
GND
RESET
(RESET)
CD
*100kΩ
Detect
Voltage
R1
R2
*The 100kΩ pull up resistor is only for G683L
VCC
VSEN
GND
RESET
(RESET)
CD
*100kΩ
Detect
Voltage
R1
R2



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