SGM894B_技术文档

SGM894B

Voltage Detector with Delay Time Adjustable

GENERAL DESCRIPTION

FEATURES

The SGM894B is a low power consumption voltage

detector with high accuracy detection. The miniature

device offers tremendous flexibility with an adjustable

threshold that is available from 1V to 5V with 0.1V

increments. The SGM894B has an external capacitor-

adjustable time delay. The device is ideal for use in

power-supply sequencing, reset sequencing, and power-

switching applications.

● High Accuracy Detection: ±1% (TYP)

● Low Power Consumption:0.4μA (TYP) at V_IN= 1V

● Detection Voltage Range: 1V to 5V (0.1V Increments)

● Operating Voltage Range: 1V to 6V

● Detection Voltage Temperature Coefficient:

±40ppm/℃ (TYP)

● N-Channel Open-Drain Output

● Built-in Delay Circuit: Adjustable Delay Time

● -40℃ to +125℃ Operating Temperature Range

● Available in Green XTDFN-0.9×1.2-4L and

SC70-4 (R) Packages

Moreover, the release delay time can be adjusted by

the external capacitor which is connected to the C_Dpin.

Consequently, the delay time can be set to more than

1s when C_Dcapacitor is 1μF. Open-drain output

configuration is available.

TYPICAL APPLICATION

The SGM894B is available in Green XTDFN-0.9×1.2-4L

and SC70-4 (R) packages. They are specified over the

-40℃ to +125℃ operating temperature range.

R_PULL

100kΩ

VIN

SGM894B

V_IN

C_D

VOUT

APPLICATIONS

C_D

GND

Microprocessor Reset Circuitry

Charge Voltage Monitors

Memory Battery Back-Up Switch Circuits

Power Failure Detection Circuits

Figure 1. Typical Application Circuit

SG Micro Corp

JUNE2021–REV. A

www.sg-micro.com

SGM894B

Voltage Detector with Delay Time Adjustable

PACKAGE/ORDERING INFORMATION

DETECTION

VOLTAGE

(V)

SPECIFIED

TEMPERATURE

RANGE

PACKAGE

DESCRIPTION

ORDERING

NUMBER

PACKAGE

MARKING

PACKING

OPTION

MODEL

XTDFN-0.9×1.2-4L

SC70-4 (R)

SGM894B-1.0XXEJ4G/TR

SGM894B-1.0XC4G/TR

SGM894B-1.1XXEJ4G/TR

SGM894B-1.1XC4G/TR

SGM894B-1.2XXEJ4G/TR

SGM894B-1.2XC4G/TR

SGM894B-1.3XXEJ4G/TR

SGM894B-1.3XC4G/TR

SGM894B-1.4XXEJ4G/TR

SGM894B-1.4XC4G/TR

SGM894B-1.5XXEJ4G/TR

SGM894B-1.5XC4G/TR

SGM894B-1.6XXEJ4G/TR

SGM894B-1.6XC4G/TR

SGM894B-1.7XXEJ4G/TR

SGM894B-1.7XC4G/TR

SGM894B-1.8XXEJ4G/TR

SGM894B-1.8XC4G/TR

SGM894B-1.9XXEJ4G/TR

SGM894B-1.9XC4G/TR

SGM894B-2.0XXEJ4G/TR

SGM894B-2.0XC4G/TR

SGM894B-2.1XXEJ4G/TR

SGM894B-2.1XC4G/TR

SGM894B-2.2XXEJ4G/TR

SGM894B-2.2XC4G/TR

Q0XX Tape and Reel, 3000

OS0XX Tape and Reel, 3000

Q6XX Tape and Reel, 3000

OS1XX Tape and Reel, 3000

-40℃ to +125℃

SGM894B-1.0

1.0

1.1

1.2

1.3

1.4

1.5

1.6

1.7

1.8

1.9

2.0

2.1

2.2

XTDFN-0.9×1.2-4L

SC70-4 (R)

SGM894B-1.1

SGM894B-1.2

SGM894B-1.3

SGM894B-1.4

SGM894B-1.5

SGM894B-1.6

SGM894B-1.7

SGM894B-1.8

SGM894B-1.9

SGM894B-2.0

SGM894B-2.1

SGM894B-2.2

XTDFN-0.9×1.2-4L

SC70-4 (R)

R9XX

OS2XX Tape and Reel, 3000

X5XX Tape and Reel, 3000

OS3XX Tape and Reel, 3000

S1XX Tape and Reel, 3000

OS4XX Tape and Reel, 3000

S2XX Tape and Reel, 3000

OS5XX Tape and Reel, 3000

S3XX Tape and Reel, 3000

Tape and Reel, 3000

XTDFN-0.9×1.2-4L

SC70-4 (R)

XTDFN-0.9×1.2-4L

SC70-4 (R)

XTDFN-0.9×1.2-4L

SC70-4 (R)

XTDFN-0.9×1.2-4L

SC70-4 (R)

OS6XX Tape and Reel, 3000

Q1XX Tape and Reel, 3000

R6FXX Tape and Reel, 3000

XTDFN-0.9×1.2-4L

SC70-4 (R)

XTDFN-0.9×1.2-4L

SC70-4 (R)

S4XX

OS7XX Tape and Reel, 3000

S5XX Tape and Reel, 3000

OS8XX Tape and Reel, 3000

S6XX Tape and Reel, 3000

OS9XX Tape and Reel, 3000

S7XX Tape and Reel, 3000

OSAXX Tape and Reel, 3000

S8XX Tape and Reel, 3000

Tape and Reel, 3000

XTDFN-0.9×1.2-4L

SC70-4 (R)

XTDFN-0.9×1.2-4L

SC70-4 (R)

XTDFN-0.9×1.2-4L

SC70-4 (R)

XTDFN-0.9×1.2-4L

SC70-4 (R)

OSBXX Tape and Reel, 3000

SG Micro Corp

www.sg-micro.com

JUNE 2021

2

SGM894B

Voltage Detector with Delay Time Adjustable

PACKAGE/ORDERING INFORMATION (continued)

DETECTION

VOLTAGE

(V)

SPECIFIED

TEMPERATURE

RANGE

PACKAGE

DESCRIPTION

ORDERING

NUMBER

PACKAGE

MARKING

PACKING

OPTION

MODEL

XTDFN-0.9×1.2-4L

SC70-4 (R)

SGM894B-2.3XXEJ4G/TR

SGM894B-2.3XC4G/TR

SGM894B-2.4XXEJ4G/TR

SGM894B-2.4XC4G/TR

SGM894B-2.5XXEJ4G/TR

SGM894B-2.5XC4G/TR

SGM894B-2.6XXEJ4G/TR

SGM894B-2.6XC4G/TR

SGM894B-2.7XXEJ4G/TR

SGM894B-2.7XC4G/TR

SGM894B-2.8XXEJ4G/TR

SGM894B-2.8XC4G/TR

SGM894B-2.9XXEJ4G/TR

SGM894B-2.9XC4G/TR

SGM894B-3.0XXEJ4G/TR

SGM894B-3.0XC4G/TR

SGM894B-3.1XXEJ4G/TR

SGM894B-3.1XC4G/TR

SGM894B-3.2XXEJ4G/TR

SGM894B-3.2XC4G/TR

SGM894B-3.3XXEJ4G/TR

SGM894B-3.3XC4G/TR

SGM894B-3.4XXEJ4G/TR

SGM894B-3.4XC4G/TR

SGM894B-3.5XXEJ4G/TR

SGM894B-3.5XC4G/TR

S9XX

Tape and Reel, 3000

-40℃ to +125℃

SGM894B-2.3

2.3

2.4

2.5

2.6

2.7

2.8

2.9

3.0

3.1

3.2

3.3

3.4

3.5

OSCXX Tape and Reel, 3000

Q2XX Tape and Reel, 3000

OSDXX Tape and Reel, 3000

XTDFN-0.9×1.2-4L

SC70-4 (R)

SGM894B-2.4

SGM894B-2.5

SGM894B-2.6

SGM894B-2.7

SGM894B-2.8

SGM894B-2.9

SGM894B-3.0

SGM894B-3.1

SGM894B-3.2

SGM894B-3.3

SGM894B-3.4

SGM894B-3.5

XTDFN-0.9×1.2-4L

SC70-4 (R)

U0XX

OSEXX Tape and Reel, 3000

U1XX Tape and Reel, 3000

OSFXX Tape and Reel, 3000

U2XX Tape and Reel, 3000

OT0XX Tape and Reel, 3000

U3XX Tape and Reel, 3000

OT1XX Tape and Reel, 3000

U4XX Tape and Reel, 3000

Tape and Reel, 3000

XTDFN-0.9×1.2-4L

SC70-4 (R)

XTDFN-0.9×1.2-4L

SC70-4 (R)

XTDFN-0.9×1.2-4L

SC70-4 (R)

XTDFN-0.9×1.2-4L

SC70-4 (R)

OT2XX Tape and Reel, 3000

Q3XX Tape and Reel, 3000

OT3XX Tape and Reel, 3000

XTDFN-0.9×1.2-4L

SC70-4 (R)

XTDFN-0.9×1.2-4L

SC70-4 (R)

U5XX

OT4XX Tape and Reel, 3000

U6XX Tape and Reel, 3000

OT5XX Tape and Reel, 3000

U7XX Tape and Reel, 3000

OT6XX Tape and Reel, 3000

X6XX Tape and Reel, 3000

OT7XX Tape and Reel, 3000

X7XX Tape and Reel, 3000

Tape and Reel, 3000

XTDFN-0.9×1.2-4L

SC70-4 (R)

XTDFN-0.9×1.2-4L

SC70-4 (R)

XTDFN-0.9×1.2-4L

SC70-4 (R)

XTDFN-0.9×1.2-4L

SC70-4 (R)

OT8XX Tape and Reel, 3000

SG Micro Corp

www.sg-micro.com

JUNE 2021

3

SGM894B

Voltage Detector with Delay Time Adjustable

PACKAGE/ORDERING INFORMATION (continued)

DETECTION

VOLTAGE

(V)

SPECIFIED

TEMPERATURE

RANGE

PACKAGE

DESCRIPTION

ORDERING

NUMBER

PACKAGE

MARKING

PACKING

OPTION

MODEL

XTDFN-0.9×1.2-4L

SC70-4 (R)

SGM894B-3.6XXEJ4G/TR

SGM894B-3.6XC4G/TR

SGM894B-3.7XXEJ4G/TR

SGM894B-3.7XC4G/TR

SGM894B-3.8XXEJ4G/TR

SGM894B-3.8XC4G/TR

SGM894B-3.9XXEJ4G/TR

SGM894B-3.9XC4G/TR

SGM894B-4.0XXEJ4G/TR

SGM894B-4.0XC4G/TR

SGM894B-4.1XXEJ4G/TR

SGM894B-4.1XC4G/TR

SGM894B-4.2XXEJ4G/TR

SGM894B-4.2XC4G/TR

SGM894B-4.3XXEJ4G/TR

SGM894B-4.3XC4G/TR

SGM894B-4.4XXEJ4G/TR

SGM894B-4.4XC4G/TR

SGM894B-4.5XXEJ4G/TR

SGM894B-4.5XC4G/TR

SGM894B-4.6XXEJ4G/TR

SGM894B-4.6XC4G/TR

SGM894B-4.7XXEJ4G/TR

SGM894B-4.7XC4G/TR

SGM894B-4.8XXEJ4G/TR

SGM894B-4.8XC4G/TR

X8XX

Tape and Reel, 3000

-40℃ to +125℃

SGM894B-3.6

3.6

3.7

3.8

3.9

4.0

4.1

4.2

4.3

4.4

4.5

4.6

4.7

4.8

OT9XX Tape and Reel, 3000

V1XX Tape and Reel, 3000

OTAXX Tape and Reel, 3000

V2XX Tape and Reel, 3000

OTBXX Tape and Reel, 3000

V3XX Tape and Reel, 3000

XTDFN-0.9×1.2-4L

SC70-4 (R)

SGM894B-3.7

SGM894B-3.8

SGM894B-3.9

SGM894B-4.0

SGM894B-4.1

SGM894B-4.2

SGM894B-4.3

SGM894B-4.4

SGM894B-4.5

SGM894B-4.6

SGM894B-4.7

SGM894B-4.8

XTDFN-0.9×1.2-4L

SC70-4 (R)

XTDFN-0.9×1.2-4L

SC70-4 (R)

OTCXX Tape and Reel, 3000

Q4XX Tape and Reel, 3000

OTDXX Tape and Reel, 3000

XTDFN-0.9×1.2-4L

SC70-4 (R)

XTDFN-0.9×1.2-4L

SC70-4 (R)

V4XX

OTEXX Tape and Reel, 3000

V5XX Tape and Reel, 3000

OTFXX Tape and Reel, 3000

V6XX Tape and Reel, 3000

OU0XX Tape and Reel, 3000

V7XX Tape and Reel, 3000

OU1XX Tape and Reel, 3000

V8XX Tape and Reel, 3000

Tape and Reel, 3000

XTDFN-0.9×1.2-4L

SC70-4 (R)

XTDFN-0.9×1.2-4L

SC70-4 (R)

XTDFN-0.9×1.2-4L

SC70-4 (R)

XTDFN-0.9×1.2-4L

SC70-4 (R)

OU2XX Tape and Reel, 3000

Q5XX Tape and Reel, 3000

OU3XX Tape and Reel, 3000

XTDFN-0.9×1.2-4L

SC70-4 (R)

XTDFN-0.9×1.2-4L

SC70-4 (R)

V9XX

OU4XX Tape and Reel, 3000

X0XX Tape and Reel, 3000

Tape and Reel, 3000

XTDFN-0.9×1.2-4L

SC70-4 (R)

OU5XX Tape and Reel, 3000

SG Micro Corp

www.sg-micro.com

JUNE 2021

4

SGM894B

Voltage Detector with Delay Time Adjustable

PACKAGE/ORDERING INFORMATION (continued)

DETECTION

VOLTAGE

(V)

SPECIFIED

TEMPERATURE

RANGE

PACKAGE

DESCRIPTION

ORDERING

NUMBER

PACKAGE

MARKING

PACKING

OPTION

MODEL

XTDFN-0.9×1.2-4L

SC70-4 (R)

SGM894B-4.9XXEJ4G/TR

SGM894B-4.9XC4G/TR

SGM894B-5.0XXEJ4G/TR

SGM894B-5.0XC4G/TR

X1XX

Tape and Reel, 3000

-40℃ to +125℃

SGM894B-4.9

4.9

5.0

OU6XX Tape and Reel, 3000

L7XX Tape and Reel, 3000

OU7XX Tape and Reel, 3000

XTDFN-0.9×1.2-4L

SC70-4 (R)

SGM894B-5.0

MARKING INFORMATION

NOTE: XX = Date Code.

XTDFN-0.9×1.2-4L

SC70-4 (R)

YY X X

YYY X X

Date Code - Week

Date Code - Year

Serial Number

Date Code - Week

Date Code - Year

Serial Number

Green (RoHS & HSF): SG Micro Corp defines "Green" to mean Pb-Free (RoHS compatible) and free of halogen substances. If

you have additional comments or questions, please contact your SGMICRO representative directly.

OVERSTRESS CAUTION

ABSOLUTE MAXIMUM RATINGS

Input Voltage Range, V_IN............................ GND - 0.3V to 7V

Output Current, I_OUT......................................................30mA

Output Voltage Range, V_OUT...................... GND - 0.3V to 7V

C_DPin Voltage Range, V_CD.............GND - 0.3V to V_IN+ 0.3V

C_DPin Current, I_CD..........................................................5mA

Package Thermal Resistance

Stresses beyond those listed in Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to

absolute maximum rating conditions for extended periods

may affect reliability. Functional operation of the device at any

conditions beyond those indicated in the Recommended

Operating Conditions section is not implied.

XTDFN-0.9×1.2-4L, θ_JA............................................ 243℃/W

SC70-4 (R), θ_JA........................................................ 680℃/W

Junction Temperature .................................................+150℃

Storage Temperature Range........................-65℃ to +150℃

Lead Temperature (Soldering, 10s) ............................+260℃

ESD Susceptibility

ESD SENSITIVITY CAUTION

This integrated circuit can be damaged if ESD protections are

not considered carefully. SGMICRO recommends that all

integrated circuits be handled with appropriate precautions.

Failureto observe proper handlingand installation procedures

can cause damage. ESD damage can range from subtle

performance degradation tocomplete device failure. Precision

integrated circuits may be more susceptible to damage

because even small parametric changes could cause the

device not to meet the published specifications.

HBM.............................................................................4000V

CDM ............................................................................1000V

RECOMMENDED OPERATING CONDITIONS

Operating Junction Temperature Range......-40℃ to +125℃

Operating Ambient Temperature Range.......-40℃ to +125℃

DISCLAIMER

SG Micro Corp reserves the right to make any change in

circuit design, or specifications without prior notice.

SG Micro Corp

www.sg-micro.com

JUNE 2021

5

SGM894B

Voltage Detector with Delay Time Adjustable

PIN CONFIGURATIONS

(TOP VIEW)

VIN

1

2

4

3

VOUT

C_D

1

2

4

3

VIN

GND

C_D

GND

XTDFN-0.9×1.2-4L

SC70-4 (R)

PIN DESCRIPTION

NAME

FUNCTION

XTDFN-0.9×1.2-4L

SC70-4 (R)

1

2

3

4

3

2

1

VOUT

C_D

Output (Detect ‘L’) Pin.

Delay Capacitor Pin.

Ground.

GND

VIN

Input Pin.

SG Micro Corp

www.sg-micro.com

JUNE 2021

6

SGM894B

Voltage Detector with Delay Time Adjustable

ELECTRICAL CHARACTERISTICS

(T_J= +25℃, unless otherwise noted.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

V_DET= 1V to 5V ⁽¹⁾, T_J= -40℃ to +125℃

Operating Voltage

V_IN

1

6

V

E-1

E-2

E-3

T_J= +25℃

V_IN= 1V to 6V,

Test Circuit 1

Detection Voltage

Hysteresis Voltage

V_DET

V

T_J= -40℃ to +125℃

V_HYS

ΔV_DET

(ΔT_J× V_DET

V_IN= 1V to 6V, R_PULL= 100kΩ, Test Circuit 1

V

Detection Voltage

Temperature Coefficient

/

±40

±150

T_J= -40℃ to +125℃, Test Circuit 1

ppm/℃

)

V

_IN= 1V

0.4

0.6

0.7

1.1

1.5

Supply Current

I_CC

Test Circuit 2

V_IN= 3V

V_IN= 6V

μA

1.0

V

_IN= 1V

0.2

9.0

0.8

V_IN= 2V

V_IN= 3V

V_IN= 4V

V_IN= 5V

V_IN= 6V

12.0

17.5

20.5

22.0

23.0

0.02

2.2

13.0

15.0

16.0

16.5

V_{DS_NCH}= 0.5V,

Test Circuit 3

Output Current

I_OUT

mA

Leakage Current

Delay Resistance

C_DPin Sink Current

I_LEAK

R_DELAY

I_CD

V_IN= V_OUT= 6V, C_D: Open, Test Circuit 3

V_IN= 5V, V_CD= 0V, Test Circuit 4

V_CD= 0.5V, V_IN= 1V, Test Circuit 4

1.50

2.6

μA

MΩ

μA

1.7

110

0.9

2.9

230

1.0

350

1.2

V

_IN= 2V

T_J= -40℃ to +125℃,

Test Circuit 5

C_DPin Threshold Voltage

V_TCD

V

V_IN= 6V

3.0

3.2

V_IN= 0.9 × V_DET(T)→ 1.1 × V_DET(T), C_D: Open,

Test Circuit 6

V_IN= 1.1 × V_DET(T)→ 0.9 × V_DET(T), C_D: Open,

Test Circuit 6

Detection Delay Time

Release Delay Time

t_DET0

t_DR0

40

80

μs

150

250

SG Micro Corp

www.sg-micro.com

JUNE 2021

7

SGM894B

Voltage Detector with Delay Time Adjustable

VOLTAGE CHART

Symbol

E-1

E-2

E-3

T_J= +25℃

V_HYS(V)

TYP

Conditions

T_J= +25℃

T_J= -40℃ to +125℃

V_DET(V), 2% Accuracy

V_DET(V), 1% Accuracy

Nominal

Voltage (V)

MIN

MAX

1.010

1.111

1.212

1.313

1.414

1.515

1.616

1.717

1.818

1.919

2.020

2.121

2.222

2.323

2.424

2.525

2.626

2.727

2.828

2.929

3.030

3.131

3.232

3.333

3.434

3.535

3.636

3.737

3.838

3.939

4.040

4.141

4.242

4.343

4.444

4.545

4.646

4.747

4.848

4.949

5.050

MIN

MAX

1.020

1.122

1.224

1.326

1.428

1.530

1.632

1.734

1.836

1.938

2.040

2.142

2.244

2.346

2.448

2.550

2.652

2.754

2.856

2.958

3.060

3.162

3.264

3.366

3.468

3.570

3.672

3.774

3.876

3.978

4.080

4.182

4.284

4.386

4.488

4.590

4.692

4.794

4.896

4.998

5.100

MIN

MAX

0.070

0.077

0.084

0.091

0.098

0.105

0.112

0.119

0.126

0.133

0.140

0.146

0.153

0.160

0.167

0.174

0.181

0.188

0.195

0.202

0.209

0.216

0.223

0.230

0.237

0.244

0.251

0.258

0.265

0.272

0.279

0.286

0.293

0.300

0.307

0.314

0.321

0.328

0.335

0.342

0.349

1.0

1.1

1.2

1.3

1.4

1.5

1.6

1.7

1.8

1.9

2.0

2.1

2.2

2.3

2.4

2.5

2.6

2.7

2.8

2.9

3.0

3.1

3.2

3.3

3.4

3.5

3.6

3.7

3.8

3.9

4.0

4.1

4.2

4.3

4.4

4.5

4.6

4.7

4.8

4.9

5.0

0.990

1.089

1.188

1.287

1.386

1.485

1.584

1.683

1.782

1.881

1.980

2.079

2.178

2.277

2.376

2.475

2.574

2.673

2.772

2.871

2.970

3.069

3.168

3.267

3.366

3.465

3.564

3.663

3.762

3.861

3.960

4.059

4.158

4.257

4.356

4.455

4.554

4.653

4.752

4.851

4.950

0.980

1.078

1.176

1.274

1.372

1.470

1.568

1.666

1.764

1.862

1.960

2.058

2.156

2.254

2.352

2.450

2.548

2.646

2.744

2.842

2.940

3.038

3.136

3.234

3.332

3.430

3.528

3.626

3.724

3.822

3.920

4.018

4.116

4.214

4.312

4.410

4.508

4.606

4.704

4.802

4.900

0.030

0.033

0.036

0.039

0.042

0.045

0.048

0.051

0.054

0.057

0.060

0.064

0.067

0.070

0.073

0.076

0.079

0.082

0.085

0.088

0.091

0.094

0.097

0.100

0.103

0.106

0.109

0.112

0.115

0.118

0.121

0.124

0.127

0.130

0.133

0.136

0.139

0.142

0.145

0.148

0.151

0.050

0.055

0.060

0.065

0.070

0.075

0.080

0.085

0.090

0.095

0.100

0.105

0.110

0.115

0.120

0.125

0.130

0.135

0.140

0.145

0.150

0.155

0.160

0.165

0.170

0.175

0.180

0.185

0.190

0.195

0.200

0.205

0.210

0.215

0.220

0.225

0.230

0.235

0.240

0.245

0.250

SG Micro Corp

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SGM894B

Voltage Detector with Delay Time Adjustable

TEST CIRCUITS

R_PULL

100kΩ

VIN

A

VOUT

SGM894B

V

C_D

V

GND

Test Circuit 1

Test Circuit 2

VIN

VOUT

SGM894B

A

C_D

A

C_D

GND

Test Circuit 3

Test Circuit 4

R_PULL

100kΩ

R_PULL

100kΩ

VIN

VOUT

SGM894B

Waveform

Measurement Point

C_D

V

C_D

GND

V

Test Circuit 5

Test Circuit 6

SG Micro Corp

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JUNE 2021

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SGM894B

Voltage Detector with Delay Time Adjustable

TYPICAL PERFORMANCE CHARACTERISTICS

Supply Current vs. Input Voltage

Output Current vs. Input Voltage

2

1.6

1.2

0.8

0.4

0

30

25

20

15

10

5

V_{DS_NCH}= 0.5V

T_J= +25℃

T_J= +125℃

T_J= -40℃

T_J= +125℃

T_J= -40℃

0

1

2

3

4

5

6

0

1

2

3

4

5

6

Input Voltage (V)

Output Voltage vs. Input Voltage

Detection Voltage vs. Temperature

V_IN= 6V, SGM894B-1.4

2.5

2

1.42

1.41

1.40

1.39

1.38

1.37

Pull-Up = V_IN,R_PULL= 100kΩ

1.5

1

T_J= -40℃

T_J= +25℃

0.5

0

T_J= +125℃

-0.5

0

0.4

0.8

1.2

1.6

2

-50

-25

0

25

50

75

100 125

Input Voltage (V)

Temperature (℃)

Hysteresis Voltage vs. Temperature

V_IN= 6V, SGM894B-1.4

Delay Resistance vs. Temperature

V_CD= 0V, V_IN= 5V

0.09

0.08

0.07

0.06

0.05

0.04

3.50

3.00

2.50

2.00

1.50

1.00

-50

-25

0

25

50

75

100 125

-50

-25

0

25

50

75

100 125

Temperature (℃)

SG Micro Corp

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SGM894B

Voltage Detector with Delay Time Adjustable

TYPICAL PERFORMANCE CHARACTERISTICS (continued)

Leakage Current vs. Temperature

V_IN= V_OUT= 6V

Detection Delay Time vs. Delay Capacitance

0.2

0.1

50

40

30

20

10

0

0.0

V_IN= 2V

V_IN= 4V

V_IN= 6V

V_IN= 1V

V_IN= 3V

V_IN= 5V

-0.1

-0.2

-0.3

-50

-25

0

25

50

75

100 125

0.0001

0.001

0.01

0.1

1

Delay Capacitor (μF)

Temperature (℃)

Release Delay Time vs. Delay Capacitance

2000

1600

1200

800

400

0

V_IN= 6V

V_IN= 3V

V_IN= 1V

0.0001

0.001

0.01

0.1

1

Delay Capacitor (μF)

SG Micro Corp

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SGM894B

Voltage Detector with Delay Time Adjustable

FUNCTIONAL BLOCK DIAGRAM

VIN

R_SEN= R₁+ R₂+ R₃

M₂

R₁

Comparator

R_DELAY

Inverter

-

VOUT

+

R₂

M₃

V_REF

M₄

M₁

R₃

GND

C_D

SGM894B

Figure 2. SGM894B Block Diagram

SG Micro Corp

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JUNE 2021

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SGM894B

Voltage Detector with Delay Time Adjustable

DETAILED DESCRIPTION

A typical circuit example is shown in Figure 3, and the timing chart of Figure 3 is shown in Figure 4.

VIN

R_SEN= R₁+ R₂+ R₃

M₂

R_PULL

R₁

Comparator

R_DELAY

Inverter

VOUT

-

V_IN

+

R₂

M₃

V_REF

M₄

M₁

R₃

GND

C_D

SGM894B

C_D(Delay Capacitor)

N-channel transistor for the delay capacitance discharge

Figure 3. Typical Application Circuit Example

Input Voltage: V_IN

Release Voltage: V_DET+ V_HYS

Detection Voltage: V_DET

Minimum Operating Voltage (0.8V)

GND

Delay Capacitance Pin Voltage: V_CD

V_TLH= V_TCD

V_THL= V_TCD- V_HYS(CD)

GND

Output Pin Voltage: V_OUT

GND

1

2

3

4

5

6

7

8

Figure 4. The Timing Chart of Figure 3

SG Micro Corp

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SGM894B

Voltage Detector with Delay Time Adjustable

DETAILED DESCRIPTION (continued)

The V_OUTtransition, the delay capacitance (C_D) charge

and discharge are determined by the status of power

supply and VIN. Figure 5 shows the timing chart. It may

go through eight processes, and below words are

shown as the description of the sequence.

then increases to 0.8V or higher again, the output

voltage may not be able to maintain the low level. Such

an operation is called "Unspecified Operation".

⑤ V_INRising up to V_DET+ V_HYS

The N-channel transistor (M₁) for the delay capacitance

discharge will be turned off, and the delay capacitance

will be charged via a delay resistor (R_DELAY), when the

input pin voltage continues to increase up to the

release voltage level (V_IN= V_DET+ V_HYS).

① Default Status before V_INFalling

In original state, the delay capacitance is charged full

and reaches the power supply input voltage (V_IN: 1V

MIN, 6V MAX).

⑥ C_Dis Charged when V_INKeeps High

The input pin is applied sufficiently high voltage (6V

MAX). While the input pin voltage (V_IN) starts dropping

to reach the detection voltage (V_DET) (V_IN> V_DET), the

output voltage (V_OUT) keeps the high level (= V_IN).

While the C_Dpin voltage rises to reach the rising logic

threshold voltage (= V_TCD) with the input pin voltage

equal to the release voltage or higher, the C_Dpin will be

charged by the time constant of the RC series circuits.

Assuming the time to the release delay time (t_DR), it can

be given by the Equation 1.

NOTE: If a pull-up resistor of the SGM894B is

connected to added power supply different from the

input voltage pin, the voltage where the pull-up resistor

is connected will be selected as high level.

t_DR= R_DELAY× C_D× 0.79

where R_DELAYis 2.2MΩ (TYP).

(1)

② Triggered V_DETwhile V_INFalling

When the input pin voltage goes down and becomes

equal to the detection voltage (V_IN= V_DET), an

N-channel transistor (M₁) for the delay capacitance

discharge is turned on, and starts to discharge the

delay capacitance.

As an example, presuming that the delay capacitance

is 0.68μF, t_DRis:

2.2 × 10⁶× 0.68 × 10^-6× 0.79 = 1182 (ms)

Note that the release delay time may be remarkably

short when the delay capacitance is not discharged to

An inverter operates as a comparator (rising logic

threshold: V_TLH= V_TCD, falling logic threshold: V_THL

=

the ground (= GND) level because time described in ③

and ④ is short.

V_TCD- V_HYS(CD)). When the C_Dpin voltage reaches the

C_Dpin falling logic threshold voltage (= V_TCD- V_HYS(CD)),

the inverter will be inverted, and the output voltage

changes into the low level (= GND). The detection

delay time (t_DET) is defined as time which ranges from

V_IN= V_DETto the V_OUTof low level (especially, when the

C_Dpin is not connected: t_DET0).

⑦ V_OUTGoes High when C_Dis Charged Full

When the delay capacitance pin voltage reaches the

delay capacitance pin rising logic threshold voltage (=

V_TCD), the inverter will be inverted. As a result, the

output voltage changes into the high (= V_IN) level. The

release delay time (t_DR0) is defined as time which

ranges from V_IN= V_DET+ V_HYSto the V_OUTof high level

with unconnected C_Dpin.

③ V_OUTKeeps Low until V_INRises

The delay capacitance is discharged to the ground

voltage (= GND) level, when the input pin voltage

keeps below the detection voltage. Then, the output

voltage maintains the low level until the input pin

voltage increases again to reach the release voltage

(V_IN< V_DET+ V_HYS).

⑧ V_OUTKeeps High when V_IN> V_DET

The C_Dpin is charged until the C_Dpin voltage becomes

the input voltage level, when the input pin voltage is

higher than the detection voltage (V_IN> V_DET).

Therefore, the output voltage maintains the high (= V_IN)

level.

④ V_INDrops to GND

While the input pin voltage drops to less than 0.8V, and

SG Micro Corp

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JUNE 2021

14

SGM894B

Voltage Detector with Delay Time Adjustable

DETAILED DESCRIPTION (continued)

The V_OUTstatus is determined by the V_INand V_CD. A

summary table of transitions about V_OUTis shown

below.

The release delay time is adjustable by the external

capacitor which is connected to C_D. The t_DRvalues for

common ideal capacitors are shown below.

Table 2. Release Delay Time Chart ^{(1) (2)}

Table 1. Function Chart

Delay Capacitance

Release Delay Time

(t_DR) (TYP) (ms)

Transition of V_OUTCondition ⁽¹⁾

(C_D) (μF)

V_IN

V_CD

0.010

0.022

0.047

0.100

0.220

0.470

1.000

17.4

38.2

81.7

174

⇒

①

②

L

H

L

⇒

L

H

L

382

H

L

817

L

⇒

1740

H

L

H

⇒

NOTES:

H

1. The release delay time values above are calculated

by the Equation 1.

2. The release delay time is influenced by the delay

capacitance.

NOTE:

1. V_OUTtransits from condition ① to ② because of the

combination of V_CDand V_IN. V_INshould exceed the

lowest operation voltage.

Examples:

1. V_OUTranges from ‘L’ to ‘H’ in the case of V_IN= ‘H’ (V_IN

≥ V_DET+ V_HYS), V_CD= ‘H’ (V_CD≥ V_TCD) while V_OUTis ‘L’.

2. V_OUTmaintains ‘H’ when V_CDranges from ‘H’ to ‘L’

(V_CD≤ V_TCD- V_HYS(CD)), V_IN= ‘H’ and V_CD= ‘L’ when V_OUT

becomes ‘H’ in ex.1.

SG Micro Corp

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JUNE 2021

15

SGM894B

Voltage Detector with Delay Time Adjustable

APPLICATION INFORMATION

1. Do not exceed the absolute conditions, and use this

IC within the stated maximum ratings. For temporary

transitional voltage drop or voltage rising phenomenon,

the IC may fail if the rated value is exceeded.

In this case, R_PULLshould be selected higher or equal to

18kΩ in order to keep the output voltage less than 0.1V

during detection.

NOTES:

2. Note that a very noisy voltage implementing at the

input voltage pin may cause a wrong operation. It is

recommended to connect a decouple capacitor as

close as possible to the input voltage pin to alleviate

this phenomenon. Sometimes, users will mount a

resistor between the power supply and the VIN pin.

This resistor and the decouple capacitor build a low

pass filter which filters the noise of the input voltage. In

this case, the IC operation current generates a voltage

drop through the series resistor. If the input pin voltage

falls below the minimum operating voltage range, the

operation may be wrong. Oscillation of the circuit may

occur if the voltage drop exceeds the hysteresis

voltage.

1. R_ONis bigger when V_INis smaller.

2. For calculation, minimum V_INshould be chosen among

the input voltage range.

During releasing, the formula is given as:

V_OUT= V_PULL/(1 + R_PULL/R_OFF

)

(3)

where:

V_PULLis the pull-up voltage.

_OFFis the off-resistance of N-channel driver M₃that is

R

15MΩ (MIN) when the driver is off (as to V_OUT/I_LEAK).

For example, when V_PULL= 6V and V_OUT≥ 5.99V, R_PULL

can be calculated as follows:

R_PULL= (V_PULL/V_OUT- 1) × R_OFF= (6/5.99 - 1) × 15 × 10⁶≈ 25kΩ

3. When there is a possibility that the input pin voltage

falls rapidly (e.g.: 6V to 0V) with the delay capacitor pin

connected to a capacitor, use a Schottky diode

connected between the VIN pin and the C_Dpin as the

Figure 5 shown below.

It is recommended to select the R_PULLsmaller or equal

to 25kΩ so that the output voltage can be higher than

5.99V during releasing.

6. SGMICRO attaches importance to improving the

products and their reliability. We require users to

incorporate fail-safe designs and post-aging protection

treatment in their systems.

4. In N-channel open-drain output product, V_OUTvoltage

level is determined by resistance of a pull-up resistor

connected at the VOUT pin. Please choose proper

resistance values with reference to Figure 6.

R_PULL

100kΩ

VIN

During detection, the formula is given as:

SBD

VOUT

SGM894B

V_OUT

V_OUT= V_PULL/(1 + R_PULL/R_ON

)

(2)

V_IN

C_D

where:

V_PULLis the pull-up voltage.

R_ONis the on-resistance of N-channel driver M₃that

can be calculated as V_{DS_NCH}/I_OUTfrom electrical

characteristics.

C_D

GND

(1)

For example, when R_ON⁽²⁾= 0.5/0.8 × 10^-3= 625Ω (MIN)

at V_IN= 1V, V_PULL= 3V and V_OUT≤ 0.1V at detection,

Figure 5. Circuit Example with the Delay Capacitor Pin

(C_D) Connected to a Schottky Barrier Diode

R

_PULLcan be calculated as follows:

R_PULL= (V_PULL/V_OUT- 1) × R_ON= (3/0.1 - 1) × 625 ≈ 18kΩ

SG Micro Corp

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JUNE 2021

16

SGM894B

Voltage Detector with Delay Time Adjustable

APPLICATION INFORMATION (continued)

V_PULL

VIN

R_SEN= R₁+ R₂+ R₃

M₂

R_PULL

R₁

Comparator

R_DELAY

Inverter

I_LEAK

-

+

VOUT

GND

V_IN

R₂

M₃

V_REF

M₄

M₁

R₃

C_D

SGM894B

NOTE: R_OFF= V_OUT/I_LEAK

.

Figure 6. Circuit Example of the SGM894B

REVISION HISTORY

NOTE: Page numbers for previous revisions may differ from page numbers in the current version.

Changes from Original (JUNE 2021) to REV.A

Page

Changed from product preview to production data.............................................................................................................................................All

SG Micro Corp

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JUNE 2021

17

PACKAGE INFORMATION

PACKAGE OUTLINE DIMENSIONS

XTDFN-0.9×1.2-4L

D

e

N4

L1

E

k

L

N1

PIN 1#

b

TOP VIEW

BOTTOM VIEW

0.55

0.425

A

0.25 1.10

A1

A2

0.20

SIDE VIEW

RECOMMENDED LAND PATTERN (Unit: mm)

Dimensions In Millimeters

Symbol

MIN

0.350

0.000

MOD

-

MAX

0.400

0.050

A

A1

A2

D

-

0.127 REF

0.900

0.850

1.150

0.150

0.950

1.250

0.250

E

1.200

b

0.200

e

0.550 BSC

0.425

L

0.375

0.475

L1

k

0.050 REF

0.250 REF

NOTE: This drawing is subject to change without notice.

SG Micro Corp

TX00205.000

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PACKAGE INFORMATION

PACKAGE OUTLINE DIMENSIONS

SC70-4 (R)

D

e1

e

0.65

1.9

E1

E

0.75

0.45

d

b

0.55

0.05

b1

RECOMMENDED LAND PATTERN (Unit: mm)

L

L1

A

A1

A2

c

θ

0.20

Dimensions

In Millimeters

Dimensions

In Inches

Symbol

MIN

MAX

1.100

0.100

1.000

0.400

0.500

0.150

MIN

MAX

0.043

0.004

0.039

0.016

0.020

0.006

A

A1

A2

b

0.900

0.000

0.900

0.250

0.350

0.080

0.035

0.000

0.035

0.010

0.014

0.003

b1

c

d

0.050TYP

0.002TYP

D

2.000

1.150

2.150

2.200

1.350

2.450

0.079

0.045

0.085

0.087

0.053

0.096

E

E1

e

0.65 TYP

0.026 TYP

0.021 REF

e1

L

1.200

1.400

0.047

0.055

0.525 REF

L1

θ

0.260

0°

0.460

8°

0.010

0°

0.018

8°

SG Micro Corp

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TX00042.001

PACKAGE INFORMATION

TAPE AND REEL INFORMATION

REEL DIMENSIONS

TAPE DIMENSIONS

P2

P0

W

Q2

Q4

Q2

Q4

Q2

Q4

Q1

Q3

Q1

Q3

Q1

Q3

B0

Reel Diameter

P1

A0

K0

Reel Width (W1)

DIRECTION OF FEED

NOTE: The picture is only for reference. Please make the object as the standard.

KEY PARAMETER LIST OF TAPE AND REEL

Reel Width

Reel

Diameter

A0

B0

K0

P0

P1

P2

W

Pin1

Package Type

W1

(mm)

(mm) (mm) (mm) (mm) (mm) (mm) (mm) Quadrant

XTDFN-0.9×1.2-4L

SC70-4 (R)

7″

8.6

9.5

1.02

3.20

1.52

2.80

0.50

1.30

4.0

2.0

8.0

Q2

Q3

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PACKAGE INFORMATION

CARTON BOX DIMENSIONS

NOTE: The picture is only for reference. Please make the object as the standard.

KEY PARAMETER LIST OF CARTON BOX

Length

(mm)

Width

(mm)

Height

(mm)

Reel Type

Pizza/Carton

7″ (Option)

7″

368

442

227

410

224

8

18

SG Micro Corp

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TX20000.000


型号：	SGM894B
厂家：	Shengbang Microelectronics Co, Ltd
描述：	Voltage Detector with Delay Time Adjustable
文件：	总21页 (文件大小：857K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

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