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BU4816G-TR Datasheet(PDF) 11 Page - Rohm

No. de Pieza. BU4816G-TR
Descripción  Low Voltage Standard CMOS Voltage Detector ICs
Descarga  16 Pages
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Fabricante  ROHM [Rohm]
Página de inicio  http://www.rohm.com
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BU4816G-TR Datasheet(HTML) 11 Page - Rohm

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Datasheet
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BU48xx series
BU49xx series
TSZ02201-0R7R0G300060-1-2
© 2014 ROHM Co., Ltd. All rights reserved.
03.Feb.2014 Rev.010
www.rohm.com
TSZ22111・15・001
●Circuit Applications
1) Examples of a common power supply detection reset circuit
Application examples of BU48xx series
(Open Drain output type) and BU49xx series
(CMOS output type) are shown below.
CASE1:The power supply of the microcontroller (VDD2)
differs from the power supply of the reset detection (V DD1).
Use the Open Drain Output Type (BU48xx series).
Attach a load resistance (RL) between the output and
VDD2. (As shown Fig.15)
CASE2:The power supply of the microcontroller (VDD1) is
same as the power supply of the reset detection (VDD1).
Use CMOS output type (BU43xx series) or Open Drain
Output Type (BU48xx series). Attach a load
resistance (RL) between the output and VDD1.
(As shown Fig.16)
When a capacitance CL for noise filtering for setting the
output delay time is connected to the VOUT pin (the reset
signal input terminal of the microcontroller), please take
into account the waveform of the rise and fall of the output
voltage (VOUT).
2) The following is an example of a circuit application in which an OR connection between two types of detection voltage
resets the microcontroller.
To reset the microcontroller when many independent power supplies are used in the system, OR connect an open drain
output type (BU48xx series) to the microcontroller’s input with pull-up resistor to the supply voltage of the microcontroller
(VDD3) as shown in Fig. 20. By pulling-up to VDD3, output “High” voltage of micro-controller power supply is possible.
VDD1
BU48xx
VDD2
GND
CL
(Capacitor for
noise filtering)
RL
CIN
RST
Micro
controller
CL
(Capacitor for
noise filtering)
VDD1
BU49xx
CIN
GND
RST
Micro
controller
Fig.15 Open Drain Output type
Fig.16 CMOS Output type
VDD1
VDD3
GND
RST
microcontroller
CT
RL
VDD2
CT
BU48Exxx
NO.1
BU48xx
NO.2
Fig.17


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