BD4735 [ROHM]

RESET IC; 复位IC


型号：	BD4735
厂家：	ROHM
描述：	RESET IC 复位IC
文件：	总5页 (文件大小：325K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

High-accuracy

Low current consumption

General-purpose

RESET IC

1pin : N.C.

2pin : SUB

3pin : GND

4pin : Vout

5pin : Vcc

BD47XXG series

Description

(UNIT:mm)

BD47XXG is a series of RESET ICs developed to prevent

system error at transient state when the power of CPU and

logic circuit switches ON/OFF or shutdown. These ICs consist

of Power, GND, and reset output to detect power supply voltage

of various systems and to output reset signal. These ICs are

more practical for portable products because of their ultra-small

package and low current consumption.

2.9±0.2

(

)

(

)

(

) ( )

1 2

(

0.05

0.03

0.13

–

Features

0.05

0.04

0.95

0.42

–

1) Detection voltage: 0.1V step line up 1.9~4.6V(Typ.)

0.1

2) High-accuracy voltage detection

3) Low current consumption

4) "L" reset output of open collector

5) Small SMP5 package

Vs±2%(Max.)

SMP5

Applications

Portable products, Equipments with CPU and logic circuit

Series characteristics

Consumption

current (µA Typ.)

Operating output

current (mA)

Hysteresis

voltage (mV)

Detection voltage Vs (V)

Package

Part No.

BD4746G

CCH

Min

Typ.

Max.

4.692

4.590

4.488

4.386

4.284

4.182

4.080

3.978

3.876

3.774

3.672

3.570

3.468

3.366

3.264

3.162

3.060

2.958

2.856

2.754

2.652

2.550

2.448

2.346

2.244

2.142

2.040

1.938

ICCL

4.508

4.410

4.312

4.214

4.116

4.018

3.920

3.822

3.724

3.626

3.528

3.430

3.332

3.234

3.136

3.038

2.940

2.842

2.744

2.646

2.548

2.450

2.352

2.254

2.156

2.058

1.960

1.862

4.600

4.500

4.400

4.300

4.200

4.100

4.000

3.900

3.800

3.700

3.600

3.500

3.400

3.300

3.200

3.100

3.000

2.900

2.800

2.700

2.600

2.500

2.400

2.300

2.200

2.100

2.000

1.900

1.5

SMP5

1.6

BD4745G

BD4744G

BD4743G

BD4742G

BD4741G

BD4740G

BD4739G

BD4738G

BD4737G

BD4736G

BD4735G

BD4734G

BD4733G

BD4732G

BD4731G

BD4730G

BD4729G

BD4728G

BD4727G

BD4726G

BD4725G

BD4724G

BD4723G

BD4722G

BD4721G

BD4720G

BD4719G

1.6

Absolute Maximum Ratings(Ta=25˚C)

Parameter

Symbol

Vcc

Limits

Unit

Power supply voltage

Output voltage

–0.3 ~ +10

150

Power dissipation (SMP5)

Operating temperature range

Storage temperature range

˚C

Topr

–20 ~ +75

Tstg

–40 ~ +125

Note) The ratings shown above indicate breakdown limit of the pin and should not be regarded as the values that guarantee the operation.

* Derating : 1.5mW/˚C for operation above Ta=25˚C

Electrical characteristics(Unless otherwise noted; Ta=25˚C)

Parameter

Symbol

Min.

Typ.

Max.

+2%

—

Unit

Conditions

Detection voltage

–2% 1.9~4.6

RL=4.7kΩ, Vcc=HÆL

RL=4.7KΩ, Ta=–20~+75˚C

RL=4.7KΩ, Vcc=LÆHÆL

Detection voltage

Vs/∆T

∆Vs

TPLH

TPHL

—

±0.01

%/˚C

µS

temperature coefficient

Hysteresis voltage

100

"H" transfer delay time

"L" transfer delay time

CL=100PF, RL=4.7KΩ

120

µS

CL=100PF, RL=4.7KΩ

0.1

1.5

1.6

0.65

—

"L" output voltage

VOL

Icc1

Icc2

VOPL

—

3.0

0.4

3.0

3.2

0.85

0.1

—

µA

Vcc=VsMIN.–0.05V, RL=4.7KΩ

Vcc=VsMIN.–0.05V, RL=∞

Vcc=VsTYP./0.85V, RL=∞

RL=4.7KΩ, VOL≥0.4V

Circuit current (At ON mode)

Circuit current (At OFF mode)

Operating limit voltage

Output leak current

"L" output current

µA

Vcc=Vout=10V

IOL

15.0

Vo=0.4V, Vcc=VsMIN.–0.05V

*1 TPLH : Vcc=(Vs typ.–0.4V)Æ(Vs typ.+0.4V)

*2 TPHL : Vcc=(Vs typ.+0.4V)Æ(Vs typ.–0.4V)

Timing waveform

Transfer delay time measurement circuit

VCC

VS+∆VS

0.22uF

RL=4.7KΩ

Vcc

Vout

100pF

VOUT

VCC

VOH

BD47XXG

SUB

GND

TPLH

TPHL

VOL

Application Circuit

VDD

VCC

Micro

controller

reset pin

Vout

Vref

BD47XXG

GND

Characteristic diagram and Measurement circuit (When BD4729G is measured.)

Current consumption

I/O characteristic

9.5

8.5

7.5

6.5

5.5

4.5

3.5

Vs=2.9V

Vs=2.95V

2.5

1.5

dVs=50mV

Icc1=1.34µA

Icc2=1.46µA

0.5

0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 7.5 8 8.5 9 9.5 10

Vcc (V)

0.5

1.5

2.5

3.5

4.5

5.5

Vcc (V)

R=4.7K

Vcc

VOUT

Vcc

VOUT

BD4729G

10µF

GND

Operating limit voltage

'L' output current

800

700

600

500

400

300

200

100

1000

900

800

700

600

500

400

300

200

100

IOL=12.194mA@Vo=400mV

VOPL=0.675V

0.25 0.5 0.75

1.25 1.5 1.75

Vcc (V)

2.25 2.5 2.75

2.5

7.5 10 12.5 15 17.5 20 22.5 25 27.5 30 32.5

Iol (mA)

R=4.7K

Vcc

VOUT

Vcc

VOUT

BD4729G

10µF

IOL

10µF

GND

Setting of the RESET signal delay time

Delay time can be set by capacitor CL and resistance RL connected to the output pin as shown below.

CL is charged by RL when Vcc is rising. The delay time caused by charging is determined by the

time constant of CL, RL and the threshold voltage of RESET pin. RESET IC discharges CL forcedly

when Vcc is falling. The delay time of RESET signal is determined by adding the delay time of single

RESET IC to each time.

VCC

VS+∆VS

VCC

Vcc

Vout

GND

CPU

Micro-controller

RESET

GND

BD47XXG

VOH

RESET

(=VOUT)

TPLH

TPHL

TPLH

VOL

Part number and Marking of samples

( )

Marking

Voltage

Marking

Marking Voltage

Part No.

1.9V

2.0V

2.1V

2.2V

2.3V

2.4V

2.5V

2.6V

2.7V

2.8V

BD4719

BD4720

BD4721

BD4722

BD4723

BD4724

BD4725

2.9V

3.0V

3.1V

3.2V

3.3V

3.4V

3.5V

3.6V

3.7V

3.8V

BD4729

BD4730

BD4731

BD4732

BD4733

BD4734

BD4735

3.9V

4.0V

4.1V

4.2V

4.3V

4.4V

4.5V

4.6V

BD4739

BD4740

BD4741

BD4742

BD4743

BD4744

BD4745

( )

BD4726

BD4727

BD4728

BD4736

BD4737

BD4738

BD4746

Lot.No

Marking

Appendix

Notes

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 described in this document are for reference only. Upon actual use, therefore, please request

that specifications to be separately delivered.

Application circuit diagrams and circuit constants contained herein are shown as examples of standard

use and operation. Please pay careful attention to the peripheral conditions when designing circuits

and deciding upon circuit constants in the set.

Any data, including, but not limited to application circuit diagrams information, described herein

are intended only as illustrations of such devices and not as the specifications for such devices. ROHM

CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any

third party's intellectual property rights or other proprietary rights, and further, assumes no liability of

whatsoever nature in the event of any such infringement, or arising from or connected with or related

to the use of such devices.

Upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or

otherwise dispose of the same, no express or implied right or license to practice or commercially

exploit any intellectual property rights or other proprietary rights owned or controlled by

ROHM CO., LTD. is granted to any such buyer.

Products listed in this document use silicon as a basic material.

Products listed in this document are no antiradiation design.

The products listed in this document are designed to be used with ordinary electronic equipment or devices

(such as audio visual equipment, office-automation equipment, communications devices, electrical

appliances and electronic toys).

Should you intend to use these products with equipment or devices which require an extremely high level of

reliability and the malfunction of with would directly endanger human life (such as medical instruments,

transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers and other

safety devices), please be sure to consult with our sales representative in advance.

About Export Control Order in Japan

Products described herein are the objects of controlled goods in Annex 1 (Item 16) of Export Trade Control

Order in Japan.

In case of export from Japan, please confirm if it applies to "objective" criteria or an "informed" (by MITI clause)

on the basis of "catch all controls for Non-Proliferation of Weapons of Mass Destruction.

Appendix1-Rev1.0

相关型号：