BD4848 [ROHM]

Standard CMOS Voltage Detector IC; 标准CMOS电压检测器IC


型号：	BD4848
厂家：	ROHM
描述：	Standard CMOS Voltage Detector IC 标准CMOS电压检测器IC
文件：	总10页 (文件大小：259K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

Voltage Detector IC Series

Standard CMOS

Voltage Detector IC

BD48□□G, BD48□□FVE, BD49□□G, BD49□□FVE series

No.09006EAT04

 Description

ROHM’s BD48□□G/FVE and BD49□□G/FVE series are highly accurate, low current consumption reset IC series. The lineup

was established with tow output types (Nch open drain and CMOS output) and detection voltages range from 2.3V to 6.0V

in increments of 0.1V, so that the series may be selected according the application at hand.

 Features

1) Detection voltage: 2.3V to 6.0V (Typ.), 0.1V steps

2) High accuracy detection voltage: ±1.0%

3) Ultra-low current consumption: 0.8μA (Typ.)

4) Nch open drain output (BD48□□G/FVE), CMOS output (BD49□□G/FVE)

5) Compact packages VSOF5: BD48□□FVE, BD49□□FVE

SSOP5: BD48□□G, BD49□□G

 Applications

All electronic devices that use microcontrollers and logic circuits

 Selection Guide

No.

Specifications

Description

Output Circuit Format

Detection Voltage

Package

8:Open Drain Output, 9:CMOS Output

Example: Displays VS over a 2.3V to 6.0V range in

0.1V increments. (2.9V is marked as “29”)

G:SSOP5 / FVE:VSOF5

Part Number : BD4

 Lineup

Detection

Voltage

6.0V

5.9V

5.8V

5.7V

5.6V

5.5V

5.4V

5.3V

5.2V

5.1V

5.0V

4.9V

4.8V

4.7V

4.6V

4.5V

4.4V

4.3V

4.2V

Part

Detection

Part

Detection

Part

Detection

Voltage

4.1V

4.0V

3.9V

3.8V

3.7V

3.6V

3.5V

3.4V

3.3V

3.2V

3.1V

3.0V

2.9V

2.8V

2.7V

2.6V

2.5V

2.4V

2.3V

Part

Marking

Number

BD4860

BD4859

BD4858

BD4857

BD4856

BD4855

BD4854

BD4853

BD4852

BD4851

BD4850

BD4849

BD4848

BD4847

BD4846

BD4845

BD4844

BD4843

BD4842

Voltage

4.1V

4.0V

3.9V

3.8V

3.7V

3.6V

3.5V

3.4V

3.3V

3.2V

3.1V

3.0V

2.9V

2.8V

2.7V

2.6V

2.5V

2.4V

2.3V

Number

BD4841

BD4840

BD4839

BD4838

BD4837

BD4836

BD4835

BD4834

BD4833

BD4832

BD4831

BD4830

BD4829

BD4828

BD4827

BD4826

BD4825

BD4824

BD4823

Voltage

6.0V

5.9V

5.8V

5.7V

5.6V

5.5V

5.4V

5.3V

5.2V

5.1V

5.0V

4.9V

4.8V

4.7V

4.6V

4.5V

4.4V

4.3V

4.2V

Number

BD4960

BD4959

BD4958

BD4957

BD4956

BD4955

BD4954

BD4953

BD4952

BD4951

BD4950

BD4949

BD4948

BD4947

BD4946

BD4945

BD4944

BD4943

BD4942

Number

BD4941

BD4940

BD4939

BD4998

BD4937

BD4936

BD4935

BD4934

BD4933

BD4932

BD4931

BD4930

BD4929

BD4928

BD4927

BD4926

BD4925

BD4924

BD4923

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2009.04 - Rev.A

1/9

Technical Note

BD48□□G, BD48□□FVE, BD49□□G, BD49□□FVE series

 Absolute maximum ratings (Ta=25°C)

Parameter

Power Supply Voltage

Symbol

Limits

-0.3 ~ +10

GND-0.3 ~ +10

GND-0.3 ~ VDD+0.3

540

Unit

VDD-GND

Nch Open Drain Output

CMOS Output

Output Voltage

VOUT

*1*3

Power

SSOP5

VSOF5

*2*3

Dissipation

210

Operating Temperature

Topr

Tstg

-40 ~ +105

-55 ~ +125

°C

Ambient Storage Temperature

*1 Use above Ta=25°C results in a 5.4mW loss per degree.

*2 Use above Ta=25°C results in a 2.1mW loss per degree.

*3 When a ROHM standard circuit board (70mm×70mm×1.6mm glass epoxy board) is mounted.

 Electrical characteristics (Unless Otherwise Specified Ta=-40 to 105°C)

Limit

Typ.

Parameter

Detection Voltage

Symbol

Condition

RL=470kΩ, VDD=HL

Unit

Min.

VS(T)

×0.99

Max.

VS(T)

×1.01

CL=100pF RＬ=100kΩ

Vout=GND50%

Output Delay Time “LH”

tPLH

100

µs

VS=2.3-3.1V

VS=3.2-4.2V

VS=4.3-5.2V

VS=5.3-6.0V

VS=2.3-3.1V

VS=3.2-4.2V

VS=4.3-5.2V

VS=5.3-6.0V

0.51

0.56

0.60

0.66

0.75

0.80

0.85

0.90

1.53

1.68

Circuit Current when ON

Circuit Current when OFF

ICC1

ICC2

VDD=VS-0.2V

µA

1.80

1.98

2.25

2.40

VDD=VS+2.0V

µA

2.55

2.70

VOL≤0.4V, Ta=25~105°C, RL=470kΩ

VOL≤0.4V, Ta=-40~25°C, RL=470kΩ

VDS=0.5V, VDD=1.5V, VS=2.3-6.0V

VDS=0.5V, VDD=2.4V, VS=2.7-6.0V

VDS=0.5V, VDD=4.8V, VS=2.3-4.2V

VDS=0.5V, VDD=6.0V, VS=4.3-5.2V

VDS=0.5V, VDD=8.0V, VS=5.3-6.0V

0.95

1.20

0.4

2.0

0.7

0.9

1.1

Minimum Operating Voltage

‘Low’Output Current (Nch)

VOPL

IOL

1.0

4.0

1.4

‘High’Output Current (Pch)

IOH

1.8

µA

(BD49□□G/FVE)

2.2

Leak Current when OFF

(BD48□□G/FVE)

Ileak

VDD=VDS=10V

0.1

Detection Voltage

Ta=-40°C to 105°C

(Designed Guarantee)

VDD=LHL

VS/∆T

∆VS

±100

±360 ppm/°C

Temperature coefficient

Hysteresis Voltage

VS×0.03 VS×0.05 VS×0.08

V_S(T) : Standard Detection Voltage(2.3V to 6.0V, 0.1V step)

R_L: Pull-up resistor to be connected between VOUT and power supply.

C_L: Capacitor to be connected between VOUT and GND.

Designed Guarantee. (Outgoing inspection is not done on all products.)

*1 Guarantee is Ta=25°C.

*2 tPLH:VDD=(Vs typ.-0.5V)(Vs typ.+0.5V)

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2009.04 - Rev.A

2/9

Technical Note

BD48□□G, BD48□□FVE, BD49□□G, BD49□□FVE series

 Block Diagrams

BD48□□G/FVE

BD49□□G/FVE

VDD

VOUT

Vref

GND

Fig.1

Fig.2

TOP VIEW

SSOP5

VSOF5

PIN No.

Symbol

VOUT

VDD

Function

Reset Output

PIN No.

Symbol

VOUT

SUB

Function

Reset Output

Substrate*

Power Supply Voltage

GND

N.C.

Unconnected Terminal

GND

N.C.

Unconnected Terminal

GND

VDD

Power Supply Voltage

N.C.

*Connect the substrate to GND.

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2009.04 - Rev.A

3/9

Technical Note

BD48□□G, BD48□□FVE, BD49□□G, BD49□□FVE series

 Reference Data (Unless specified otherwise, Ta=25°C)

2.0

1.5

1.0

0.5

0.0

BD4842G/FVE

【

】

BD4842G/FVE

【】

BD4942G/FVE

【

】

V_DD=2.4V

V_DD=8.0V

V_DD=6.0V

V_DD=4.8V

V_DD=1.2V

2.0

0.0

0.5

1.0

1.5

2.5

DRAIN-SOURCE VOLTAGE V_DS[V]

：

V_DDSUPPLY VOLTAGE V_DD[V]

：

Fig.4 “Low” Output Current

Fig.5 “High” Output Current

Fig.3 Circuit Current

1.0

0.8

0.6

0.4

0.2

0.0

BD4842G/FVE

【

】

【BD4842G/FVE】

5.4

BD4842G/FVE

【

】

5.0

4.6

4.2

3.8

3.4

3.0

Low to High（V^S+ΔV^S）

High to Low（V^S）

Ta=25

℃

Ta=25

℃

～

0.5

1.5

2.5

3.5

4.5

5.5

-40

0.5

1.5

2.5

V_DDSUPPLY VOLTAGE V_DD[V]

：

TEMPERATURE ： Ta[℃]

SUPPLY VOLTAGE ： [V]

Fig.6 I/O Characteristics

Fig.7 Operating Limit Voltage

Fig.8 Detection Voltage

Release Voltage

1.5

1.0

0.5

0.0

1.5

1.0

0.5

0.0

BD4842G/FVE

】

BD4842G/FVE

【

】

【

】

1.0

0.5

0.0

-40 -20

20 40 60 80 100

-40 -20

TEMPERATURE Ta[ ]

℃

20 40 60 80 100

-40 -20

20 40 60 80 100

TEMPERATURE Ta[

]

：

℃

：

TEMPERATURE Ta[

]

℃

：

Fig.10 Circuit Current when OFF

Fig.11 Operating Limit Voltage

Fig.9 Circuit Current when ON

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2009.04 - Rev.A

4/9

Technical Note

BD48□□G, BD48□□FVE, BD49□□G, BD49□□FVE series

 Reference Data

Examples of Leading (TPLH) and Falling (TPHL) Output

Part Number

BD4845G/FVE

BD4945G/FVE

TPLH (μs)

39.5

TPHL (μs)

87.8

32.4

52.4

VDD=4.3V5.1V

VDD=5.1V4.3V

*This data is for reference only.

The figures will vary with the application, so please confirm actual operating conditions before use.

 Explanation of Operation

For both the open drain type (Fig.12) and the CMOS output type (Fig.13), the detection and release voltages are used as

threshold voltages. When the voltage applied to the VDD pins reaches the applicable threshold voltage, the VOUT terminal

voltage switches from either “High” to “Low” or from “Low” to “High”. Because the BD48□□G/FVE series uses an open drain

output type, it is possible to connect a pull-up resistor to VDD or another power supply [The output “High” voltage (VOUT) in

this case becomes VDD or the voltage of the other power supply].

VDD

Vref

VOUT

GND

Fig.12 (BD48□□ Type Internal Block Diagram)

Fig.13 (BD49□□ Type Internal Block Diagram)

 Timing Waveform

Example: the following shows the relationship between the input voltages VDD and the output voltage VOUT when the

input power supply voltage VDD is made to sweep up and sweep down (the circuits are those in Fig.12 and 13).

When the power supply is turned on, the output is unsettled from

after over the operating limit voltage (VOPL) until TPHL. There fore it

V^DET+ΔV^DET

is possible that the reset signal is not outputted when the rise time of

VDD is faster than TPHL.

⑤

V^DET

When VDD is greater than VOPL but less than the reset release

V^OPL

voltage (VS + ∆VS), the output voltages will switch to Low.

If VDD exceeds the reset release voltage (VS + ∆VS), then

OUT

VOUT switches from L to H.

V^OH

If VDD drops below the detection voltage (VS) when the power

T^PLH

T^PHL

PLH

supply is powered down or when there is a power supply fluctuation,

VOUT switches to L (with a delay of TPHL).

T^PHL

V^OL

The potential difference between the detection voltage and the

①

②

③

④

release voltage is known as the hysteresis width (∆VS). The system

is designed such that the output does not flip-flop with power supply

fluctuations within this hysteresis width, preventing malfunctions due

to noise.

Fig.14

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2009.04 - Rev.A

5/9

Technical Note

BD48□□G, BD48□□FVE, BD49□□G, BD49□□FVE series

 Circuit Applications

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

Application examples of BD48□□G/FVE series (Open

Drain output type) and BD49□□G/FVE series (CMOS

output type) are shown below.

VDD1

VDD2

Microcontroller

CASE1: the power supply of the microcontroller (VDD2)

differs from the power supply of the reset detection

(VDD1).

BD48□□□

Use the open drain output type (BD48□□G/FVE) attached

a load resistance (RL) between the output and VDD2. (As

shown Fig.15)

（Noise-filtering

Capacitor）

GND

Fig.15 Open Collector Output Type

CASE2: the power supply of the microcontroller (VDD1) is

same as the power supply of the reset detection (VDD1).

Use CMOS output type (BD49□□G/FVE) or open drain

output type (BD48□□G/FVE) attached a load resistance

(RL) between the output and Vdd1. (As shown Fig.16)

VDD1

BD49□□□

Microcontroller

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).

(Noise-filtering

Capacitor）

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 voltages

resets the microcontroller.

VDD1

VDD2

VDD3

Microcontroller

RST

BD48□□□

GND

Fig.17

When there are many power supplies of the system, power supplies VDD1 and VDD2 are being monitored separately, and

it is necessary to reset the microcomputer, it is possible to use an OR connection on the open drain output type

BD48□□G/FVE series to pull-up to the desired voltage (VDD3) as shown in Fig.17 and make the output “High” voltage

matches the power supply voltage VDD3 of the microcontroller.

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2009.04 - Rev.A

6/9

Technical Note

BD48□□G, BD48□□FVE, BD49□□G, BD49□□FVE series

Examples of the power supply with resistor dividers

In applications where the power supply input terminal (VDD) of an IC with resistor dividers, it is possible that a through

current will momentarily flow into the circuit when the output logic switches, resulting in malfunctions (such as output

oscillatory state).

(Through-current is a current that momentarily flows from the power supply (VDD) to ground (GND) when the output level

switches from “High” to “Low” or vice versa.)

BD48□□□

BD49□□□

OUT

CIN

GND

Fig.18

A voltage drop of [the through-current (I1)] × [input resistor (R2)] is caused by the through current, and the input voltage to

descends, when the output switches from “Low” to “High”. When the input voltage decreases and falls below the detection

voltage, the output voltage switches from “High” to “Low”. At this time, the through-current stops flowing through output

“Low”, and the voltage drop is eliminated. As a result, the output switches from “Low” to “High”, which again causes the

through current to flow and the voltage drop. This process is repeated, resulting in oscillation.

IDD

Through Current

VDD

VDET

Fig.19 Current Consumption vs. Power Supply Voltage

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2009.04 - Rev.A

7/9

Technical Note

BD48□□G, BD48□□FVE, BD49□□G, BD49□□FVE series

 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 countermeasure, like fuse, is to be given

when a specific mode to be beyond absolute maximum ratings is considered.

2 . GND potential

GND terminal should be a lowest voltage potential every state.

Please make sure all pins, which are over ground even if, include transient feature.

3 . Electrical Characteristics

Be sure to check the electrical characteristics that are one the tentative specification will be changed by temperature,

supply voltage, and external circuit.

4 . Bypass Capacitor for Noise Rejection

Please put into the capacitor of 1μF or more between VDD pin and GND, and the capacitor of about 1000pF between VOUT

pin and GND, to reject noise. If extremely big capacitor is used, transient response might be late. Please confirm sufficiently

for the point.

5 . Short Circuit between Terminal and Soldering

Don’t short-circuit between Output pin and VDD pin, Output pin and GND pin, or VDD pin and GND pin. When soldering the

IC on circuit board, please be unusually cautious about the orientation and the position of the IC. When the orientation is

mistaken the IC may be destroyed.

6 . Electromagnetic Field

Mal-function may happen when the device is used in the strong electromagnetic field.

7 . The VDD line inpedance might cause oscillation because of the detection current.

8 . A VDD -GND capacitor (as close connection as possible) should be used in high VDD line impedance condition.

9 . Lower than the mininum input voltage makes the VOUT high impedance, and it must be VDD in pull up (VDD) condition.

10. This IC has extremely high impedance terminals. Small leak current due to the uncleanness of PCB surface might cause

unexpected operations. Application values in these conditions should be selected carefully. If the leakage is assumed

between the VOUT terminal and the GND terminal, the pull-up resistor should be less than 1/10 of the assumed leak

resistance.

11. External parameters

The recommended parameter range for RL is 10kꢀ~1Mꢀ. There are many factors (board layout, etc) that can affect

characteristics. Please verify and confirm using practical applications.

12. Power on reset operation

Please note that the power on reset output varies with the VDD rise up time. Please verify the actual operation.

13. Precautions for board inspection

Connecting low-impedance capacitors to run inspections with the board may produce stress on the IC. Therefore, be

certain to use proper discharge procedure before each process of the test operation.

To prevent electrostatic accumulation and discharge in the assembly process, thoroughly ground yourself and any

equipment that could sustain ESD damage, and continue observing ESD-prevention procedures in all handing, transfer

and storage operations. Before attempting to connect components to the test setup, make certain that the power supply is

OFF. Likewise, be sure the power supply is OFF before removing any component connected to the test setup.

14. When the power supply, is turned on because of in certain cases, momentary Rash-current flow into the IC at the logic

unsettled, the couple capacitance, GND pattern of width and leading line must be considered.

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2009.04 - Rev.A

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Technical Note

BD48□□G, BD48□□FVE, BD49□□G, BD49□□FVE series

 Part Number Selection

－

Standard CMOS Reset IC

BD48: Open Drain Type

BD49: CMOS Output Type

Reset Voltage Value

23: 2.3V to (0.1V step)

60: 6.0V

Package

Taping Specifications

Embossed Taping

G: SSOP5

FVE: VSOF5

SSOP5

(Unit：mm)

<Tape and Reel information> SSOP5

Tape

Embossed carrier tape

3000pcs

−

6_°

2.9 0.2

Quantity

TR (The direction is the 1pin of product is at the upper left

when you hold reel on the left hand and you pull out the tape

on the right hand)

Direction

of feed

+0.05

0.13 −0.03

+0.05

−0.04

0.42

0.95

0.1

Direction of feed

* When you order, please order in times the amount of package quantity.

1Pin

Reel

VSOF5

(Unit：mm)

<Tape and Reel information> VSOF5

Tape

Embossed carrier tape

3000pcs

Quantity

TR (The direction is the 1pin of product is at the upper left

when you hold reel on the left hand and you pull out the tape

on the right hand)

Direction

of feed

1.6 0.05

1.0 0.05

0.13 0.05

2 3

0.5

0.22 0.05

0.08

Direction of feed

1Pin

Reel

*When you order, please order in times the amount of package quantity.

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2009.04 - Rev.A

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Notice

N o t e s

No copying or reproduction of this document, in part or in whole, is permitted without the

consent of ROHM Co.,Ltd.

The content speciﬁed herein is subject to change for improvement without notice.

The content speciﬁed herein is for the purpose of introducing ROHM's products (hereinafter

"Products"). If you wish to use any such Product, please be sure to refer to the speciﬁcations,

which can be obtained from ROHM upon request.

Examples of application circuits, circuit constants and any other information contained herein

illustrate the standard usage and operations of the Products. The peripheral conditions must

be taken into account when designing circuits for mass production.

Great care was taken in ensuring the accuracy of the information speciﬁed in this document.

However, should you incur any damage arising from any inaccuracy or misprint of such

information, ROHM shall bear no responsibility for such damage.

The technical information speciﬁed herein is intended only to show the typical functions of and

examples of application circuits for the Products. ROHM does not grant you, explicitly or

implicitly, any license to use or exercise intellectual property or other rights held by ROHM and

other parties. ROHM shall bear no responsibility whatsoever for any dispute arising from the

use of such technical information.

The Products speciﬁed in this document are intended to be used with general-use electronic

equipment or devices (such as audio visual equipment, ofﬁce-automation equipment, commu-

nication devices, electronic appliances and amusement devices).

The Products speciﬁed in this document are not designed to be radiation tolerant.

While ROHM always makes efforts to enhance the quality and reliability of its Products, a

Product may fail or malfunction for a variety of reasons.

Please be sure to implement in your equipment using the Products safety measures to guard

against the possibility of physical injury, ﬁre or any other damage caused in the event of the

failure of any Product, such as derating, redundancy, ﬁre control and fail-safe designs. ROHM

shall bear no responsibility whatsoever for your use of any Product outside of the prescribed

scope or not in accordance with the instruction manual.

The Products are not designed or manufactured to be used with any equipment, device or

system which requires an extremely high level of reliability the failure or malfunction of which

may result in a direct threat to human life or create a risk of human injury (such as a medical

instrument, transportation equipment, aerospace machinery, nuclear-reactor controller,

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such special purpose, please contact a ROHM sales representative before purchasing.

If you intend to export or ship overseas any Product or technology speciﬁed herein that may

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Thank you for your accessing to ROHM product informations.

More detail product informations and catalogs are available, please contact us.

ROHM Customer Support System

http://www.rohm.com/contact/

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R0039

BD4848 [ROHM]

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