BD5335(2013) Просмотр технического описания (PDF) - ROHM Semiconductor
Номер в каталоге
Компоненты Описание
производитель
BD5335 Datasheet PDF : 16 Pages
| |||
BD52xx series BD53xx series
●Circuit Applications
1) Examples of a common power supply detection reset circuit
Datasheet
VDD1
CT
BD52xx
VDD2
RL
RST
Micro
controller
CL
（Noise-filtering
Capacitor）
GND
Application examples of BD52xx series (Open Drain
output type) and BD53xx series (CMOS output type) are
shown below.
CASE1: Power supply of the microcontroller (VDD2)
differs from the power supply of the reset detection
(VDD1).
Use an open drain output type (BD52xx) device with a
load resistance RL attached as shown Fig.18.
VDD1
Fig.18 Open Drain Output Type
CT
GND
BD53xx
RST
Micro
controller
CL
（Noise-filtering
Capacitor）
Fig.19 CMOS Output Type
CASE2: Power supply of the microcontroller (VDD1) is the
same as the power supply of the reset detection (VDD1).
Use a CMOS output type (BD53xx) device or an open
drain output type (BD52xx) device with a pull up resistor
between the output and VDD1.
When a capacitance CL for noise filtering 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).
Please refer to Operational Notes for recommendations
on resistor and capacitor values.
2) The following is an example of a circuit application in which an OR connection between two types of detection voltage
resets the microcontroller.
VDD1
VDD2
VDD3
BD52xx
NO.1
CT
BD52xx
NO.2
CT
RL
RST
microcontroller
Fig.20
GND
To reset the microcontroller when many independent power supplies are used in the system, OR connect an open drain
output type (BD52xx 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.
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
11/13
TSZ02201-0R7R0G300040-1-2
22.May.2013 Rev.006
Share Link: 