Datasheet > BD48E23FVE-TL

BD48E23FVE-TL

更新时间： 2022-04-20 01:14:19

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罗姆 - ROHM		/
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18页	433K
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Standard CMOS Voltage Detector IC

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BD48E23FVE-TL 数据手册

Datasheet

BD48xxx series BD49xxx series

●Circuit Applications

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

Application examples of BD48xxx series (Open Drain

output type) and BD49xxx series (CMOS output type)

are shown on the left.

DD1

DD2

Micro

controller

CASE1: Power supply of the microcontroller (V_DD2

)

BD48xxx

differs from the power supply of the reset detection IC

(V_DD1).

C_L

Use an open drain output type (BD48xxx) 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 IC

(V_DD1).

Fig.15 Open Drain Output Type

Use a CMOS output type (BD49xxx) device or an open

drain device with a pull up resistor between output and

VDD1.

DD1

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 rise and

fall waveform of the output voltage (V_OUT).

BD49xxx

C_L

capacitor is for

(

filtering

）

The Electrical characteristics were measured using

GND

R_L= 470kΩ and C_L= 100pF.

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

BD48xxx

GND

Fig.17

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

output type (BD48xxx 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

TSZ02201-0R7R0G300030-1-2

22.May.2013.Rev.008

13/15

TSZ22111・15・001

1...10 11 121314 15 16...18

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