bd4729g ROHM Co. Ltd., bd4729g Datasheet

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bd4729g

Manufacturer Part Number
bd4729g
Description
Bipolar Voltage Detector Ic
Manufacturer
ROHM Co. Ltd.
Datasheet

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Voltage Detector IC Series
Bipolar
Voltage Detector IC
BD47□□G Series
●General Description
●Features
●Applications
●Lineup
Part Number
Selection Guide
The BD47□□G Series is a reset IC that was developed to prevent system errors at transient state when the power of CPU or logic circuit
switches ON/OFF or momentary shut down. These ICs consist of three terminals (power supply, GND and reset output) to detect power
supply voltages and outputs reset signals of various systems. These ICs are ultra-compact and are realized low current consumption,
making them ideal for portable products.
All electronic devices that use microcontrollers and logic circuits
Marking
1)
2)
3)
4)
5)
BW
BZ
BY
BX
BV
BU
BT
BS
B2
B1
Detection voltage range: 0.1-volt step line-up 1.9-4.6V (Typ.)
High accuracy voltage detection: ±1%
Low current consumption
Open collector “L” reset output
Compact SSOP5 package
Detection
Voltage
4.6V
4.5V
4.4V
4.3V
4.2V
4.1V
4.0V
3.9V
3.8V
3.7V
:BD47□ □ G
Part Number
BD4746
BD4745
BD4744
BD4743
BD4742
BD4741
BD4740
BD4739
BD4738
BD4737
TECHNICAL NOTE
Marking
BM
BR
BQ
BN
BK
BP
B4
BL
BJ
B3
Number
Detection
Voltage
3.6V
3.5V
3.4V
3.3V
3.2V
3.1V
2.0V
2.9V
2.8V
2.7V
Specifications
Detection
Voltage
Part Number
BD4736
BD4735
BD4734
BD4733
BD4732
BD4731
BD4730
BD4729
BD4728
BD4727
Example: Voltage range over 1.9V-4.6V in 0.1V
Marking
2.9V is marked as “29”
BH
BG
BE
BD
BC
BB
BA
BF
increments.
Description
Detection
Voltage
2.6V
2.5V
2.4V
2.3V
2.2V
2.1V
2.0V
1.9V
Part Number
BD4726
BD4725
BD4724
BD4723
BD4722
BD4721
BD4720
BD4719
2007.Apr.

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bd4729g Summary of contents

Page 1

TECHNICAL NOTE Voltage Detector IC Series Bipolar Voltage Detector IC BD47□□G Series ●General Description The BD47□□G Series is a reset IC that was developed to prevent system errors at transient state when the power of CPU or logic circuit switches ...

Page 2

Maximum Rating (Ta=25℃) Parameter Power Supply Voltage Output Voltage *1 Power Dissipation *2 Operating Temperature Ambient Storage Temperature 1 When a ROHM standard circuit board (70mm×70mm×1.6mm glass epoxy board) is mounted When used at temperatures higher than ...

Page 3

... TEMPERATURE : Ta[ ℃ ] Fig.6 Detection Voltage 0.9 【 BD4729G 】 0.8 0.7 0.6 0.5 0.4 -20 - TEMPERATURE : Ta[ ℃ ] Fig.9 Operating Limit Voltage 3/8 6 【 BD4729G 】 =2.90V V =2.95V =50mV ...

Page 4

Operation BD47 □□ G series has the detection voltages and release voltages as threshold voltages and, as the voltages applied to the input reach their respective threshold voltages, the output switches from “High” to “Low” and from “Low” ...

Page 5

Applications 1 ) The following is an example of an application circuit using Reset IC for normal power supply detection. BD47 □□ G series requires a pull up resistor on the output terminal. The pull up resister value should ...

Page 6

OR connection between two types of detection voltage. V CC1 V BD47□□G No.1 When there are several system power supplies and it is necessary to monitor power supplies ...

Page 7

Operation Notes 1. Absolute maximum range Absolute Maximum Ratings are those values beyond which the life of a device may be destroyed. We cannot be defined the failure mode, such as short mode or open mode. Therefore a physical security ...

Page 8

Part Number Selection Bipolar Reset SSOP5 <Dimension> 2.9 0 0.13 0.05 0.42 0.04 0.95 0.1 The contents described herein are correct as of October, 2005 The contents described herein are ...

Page 9

Appendix No technical content pages of this document may be reproduced in any form or transmitted by any means without prior permission of ROHM CO.,LTD. The contents described herein are subject to change without notice. The specifications for the product ...

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