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PDF BD4732 Data sheet ( Hoja de datos )

Número de pieza BD4732
Descripción Bipolar Voltage Detector IC
Fabricantes ROHM Semiconductor 
Logotipo ROHM Semiconductor Logotipo



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Voltage Detector IC Series
Bipolar
Voltage Detector ICs
BD47xx series
General Description
The BD47xx series is a Voltage Detector IC,
developed to prevent system errors at transient state,
when the power of CPU or logic circuit switches
ON/OFF or in cases of 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 have low current consumption,
making them ideal for portable products.
Features
High accuracy detection
Low current consumption
Very small package
Open collector “L” reset output
Package SSOP5 is similar to SOT-23-5 (JEDEC)
Typical Application Circuit
Datasheet
Key Specifications
Detection voltage range:
1.9V to 4.6V (Typ.)
0.1V steps
High accuracy detection voltage:
±1%
Low current consumption:
1.6µA (Typ.)
Operating temperature range:
-40°C to +75°C
Package
SSOP5
2.90mm x 2.80mm x 1.25mm
Applications
Circuits using microcontrollers or logic circuits that require
a reset.
BD47xx series
VDD
VOUT
GND
VDD
RL
RESET
CPU
Micro-controller
CL
GND
Connection Diagram
SSOP5
TOP VIEW
VDD
VOUT
Marking
Lot. No
N.C. SUB GND
Pin Descriptions
PIN No. Symbol
Function
1
N.C.
Unconnected Terminal
2 SUB Substrate*
3 GND GND
4 VOUT Reset Output
5 VDD Power Supply Voltage
*Substrate Pin should be connected with GND
Product structureSilicon monolithic integrated circuit
.www.rohm.com
© 2016 ROHM Co., Ltd. All rights reserved.
TSZ2211114001
This product is not designed for protection against radioactive rays
1/10
TSZ02201-0R7R0G300020-1-2
21.Jun.2016 Rev.007

1 page




BD4732 pdf
BD47xx series
Typical Performance Curves
10
9 BBDD4477229G
8
7
6
5
4
3
2
1 Icc1=1.34μA
0 Icc2=1.46μA
0 1 2 3 4 5 6 7 8 9 10
VDD SUPPLY VOLTAGE VDD[V]
Fig.2 Circuit Current
6
BBDD4477229G
5
4
3
2
VDET=2.90V VDET=2.95V
1
VDET=50mV
0
0123456
VDD SUPPLY VOLTAGE VDD[V]
Fig.4 I/O Characteristics
800
700 BBDD44772299G
600
500
400 IOL=12.194mA at Vo=400mV
300
200
100
0
0 5 10 15 20 25 30
OUTPUT VOLTAGE VOUT[mV]
Fig.3 “Low” Output Current
1000
900
800
700
600
500
400
300
200
100
0
0
BD472299G
VOPL=0.675V
0.5 1 1.5 2 2.5
VDD SUPPLY VOLTAGE VDD[V]
Fig.5 Operating Limit Voltage
www.rohm.com
© 2016 ROHM Co., Ltd. All rights reserved.
TSZ2211115001
5/10
TSZ02201-0R7R0G300020-1-2
21.Jun.2016 Rev.007

5 Page





BD4732 arduino
Notice
Precaution on using ROHM Products
1. Our Products are designed and manufactured for application in ordinary electronic equipments (such as AV equipment,
OA equipment, telecommunication equipment, home electronic appliances, amusement equipment, etc.). If you
intend to use our Products in devices requiring extremely high reliability (such as medical equipment (Note 1), transport
equipment, traffic equipment, aircraft/spacecraft, nuclear power controllers, fuel controllers, car equipment including car
accessories, safety devices, etc.) and whose malfunction or failure may cause loss of human life, bodily injury or
serious damage to property (Specific Applications), please consult with the ROHM sales representative in advance.
Unless otherwise agreed in writing by ROHM in advance, ROHM shall not be in any way responsible or liable for any
damages, expenses or losses incurred by you or third parties arising from the use of any ROHMs Products for Specific
Applications.
(Note1) Medical Equipment Classification of the Specific Applications
JAPAN
USA
EU CHINA
CLASS
CLASS
CLASS
CLASSb
CLASS
CLASS
2. ROHM designs and manufactures its Products subject to strict quality control system. However, semiconductor
products can fail or malfunction at a certain rate. Please be sure to implement, at your own responsibilities, adequate
safety measures including but not limited to fail-safe design against the physical injury, damage to any property, which
a failure or malfunction of our Products may cause. The following are examples of safety measures:
[a] Installation of protection circuits or other protective devices to improve system safety
[b] Installation of redundant circuits to reduce the impact of single or multiple circuit failure
3. Our Products are designed and manufactured for use under standard conditions and not under any special or
extraordinary environments or conditions, as exemplified below. Accordingly, ROHM shall not be in any way
responsible or liable for any damages, expenses or losses arising from the use of any ROHM’s Products under any
special or extraordinary environments or conditions. If you intend to use our Products under any special or
extraordinary environments or conditions (as exemplified below), your independent verification and confirmation of
product performance, reliability, etc, prior to use, must be necessary:
[a] Use of our Products in any types of liquid, including water, oils, chemicals, and organic solvents
[b] Use of our Products outdoors or in places where the Products are exposed to direct sunlight or dust
[c] Use of our Products in places where the Products are exposed to sea wind or corrosive gases, including Cl2,
H2S, NH3, SO2, and NO2
[d] Use of our Products in places where the Products are exposed to static electricity or electromagnetic waves
[e] Use of our Products in proximity to heat-producing components, plastic cords, or other flammable items
[f] Sealing or coating our Products with resin or other coating materials
[g] Use of our Products without cleaning residue of flux (even if you use no-clean type fluxes, cleaning residue of
flux is recommended); or Washing our Products by using water or water-soluble cleaning agents for cleaning
residue after soldering
[h] Use of the Products in places subject to dew condensation
4. The Products are not subject to radiation-proof design.
5. Please verify and confirm characteristics of the final or mounted products in using the Products.
6. In particular, if a transient load (a large amount of load applied in a short period of time, such as pulse. is applied,
confirmation of performance characteristics after on-board mounting is strongly recommended. Avoid applying power
exceeding normal rated power; exceeding the power rating under steady-state loading condition may negatively affect
product performance and reliability.
7. De-rate Power Dissipation depending on ambient temperature. When used in sealed area, confirm that it is the use in
the range that does not exceed the maximum junction temperature.
8. Confirm that operation temperature is within the specified range described in the product specification.
9. ROHM shall not be in any way responsible or liable for failure induced under deviant condition from what is defined in
this document.
Precaution for Mounting / Circuit board design
1. When a highly active halogenous (chlorine, bromine, etc.) flux is used, the residue of flux may negatively affect product
performance and reliability.
2. In principle, the reflow soldering method must be used on a surface-mount products, the flow soldering method must
be used on a through hole mount products. If the flow soldering method is preferred on a surface-mount products,
please consult with the ROHM representative in advance.
For details, please refer to ROHM Mounting specification
Notice-PGA-E
© 2015 ROHM Co., Ltd. All rights reserved.
Rev.003

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