Datasheet > BD48E23

BD48E23

更新时间： 2022-04-20 01:14:16

品牌	Logo	应用领域
罗姆 - ROHM		/
页数	文件大小	规格书
17页	343K
描述
Standard CMOS Voltage Detector IC

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BD48E23 数据手册

Datasheet

BD48Exxx-M series BD49Exxx-M series

●Circuit Applications

1) Examples of a common power supply detection reset circuit.

Application examples of BD48Exxx-M series (Open

Drain output type) and BD49Exxx-M series (CMOS

output type) are shown on the left.

DD1

DD2

Micro

Controller

CASE1: Power supply of the microcontroller (V_DD2

)

BD48Exxx-M

differs from the power supply of the reset detection

(V_DD1).

C_L

Use an open drain output type (BD48xxx-M) device with

a load resistance R_Lattached as shown in figure 15.

Capacitor is for

noise filtering

(

）

GND

CASE2: Power supply of the microcontroller (V_DD1) is

same as the power supply of the reset detection (V_DD1).

Use a CMOS output type (BD49xxx-M) device or an

open drain device with a pull up resistor between output

and VDD1.

Fig.15 Open Drain Output Type

VDD1

Micro

Controller

When a capacitance C_Lfor noise filtering is connected to

the V_OUTpin (the reset signal input terminal of the

microcontroller), please take into account the waveform

of the rise and fall of the output voltage (V_OUT).

BD49Exxx-M

RST

C_L

Capacitor is for

(

The Electrical characteristics were measured using

filtering

）

R_L= 470kΩ and C_L= 100pF.

GND

Fig.16 CMOS Output Type

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

Microcontroller

RST

BD48Exxx-M

GND

Fig.17

To reset the microcontroller when many independent power supplies are used in the system, OR connect an open drain

output type (BD48Exxx-M series) to the microcontroller’s input with pull-up resistor to the supply voltage of the

microcontroller (V_DD3) as shown in Fig. 17. By pulling-up to V_DD3, output “High” voltage of micro-controller power supply is

possible.

www.rohm.com

TSZ02201-0R7R0G300070-1-2

22.May.2013.Rev.003

11/14

TSZ22111・15・001

1...8 9 101112 13 14...17

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