R3111E521C [RICOH]

LOW VOLTAGE DETECTOR; 低电压检测


型号：	R3111E521C
厂家：	RICOH ELECTRONICS DEVICES DIVISION
描述：	LOW VOLTAGE DETECTOR 低电压检测
文件：	总20页 (文件大小：207K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

’98.Dec.05

LOW VOLTAGE DETECTOR

R3111xxx1A/C Series

■ OUTLINE

The R3111 Series are voltage detector ICs with high detector threshold accuracy and ultra-low supply current by CMOS

process, which can be operated at an extremely low voltage and is used for system reset as an example.

Each of these ICs consists of a voltage reference unit, a comparator, resistors for detector threshold setting, an output driver

and a hysteresis circuit. The detector threshold is fixed with high accuracy internally and does not require any adjustment.

Two output types, Nch open drain type and CMOS type are available.

The R3111 Series are operable at a lower voltage than that for the RX5VL Series, and can be driven by a single battery.

Four types of packages, TO-92, SOT-89, SOT-23-5 and SC-82AB are available.

■ FEATURES

●

Ultra-low Supply Current............................................................... TYP. 0.8µA (V^DD=1.5V)

Wide Range of Operating Voltage.................................................. 0.7 to 10.0V(Topt=25°C)

Detector Threshold......................................................................... Stepwise setting with a step of 0.1V in the range of

0.9V to 6.0V is possible.

●

High Accuracy Detector Threshold................................................ ±2.0%

Low Temperature-Drift Coefficient of Detector Threshold............ TYP. ±100ppm/°C

Two Output Types .......................................................................... Nch Open Drain and CMOS

Four Types of Packages.................................................................. TO-92, SOT-89(Mini-power Mold), SOT-23-5 (Mini-

mold), SC-82AB

■ APPLICATIONS

●

CPU and Logic Circuit Reset

Battery Checker

Window Comparator

Wave Shaping Circuit

Battery Back-up Circuit

Power Failure Detector

■ BLOCK DIAGRAMS

R3111XXX1A

R3111XXX1C

OUT

GND

OUT

GND

Vref

Rev.1.10

- 1 -

■ TIMING CHART

Release Voltage +V^DET

Detector Threshold -VDET

Detector Threshold

Hysteresis

Supply Voltage

(VDD

)

Minimum Operating Voltage

VSS

Output Voltage

(OUT)

PLH

■ DEFINITION OF OUTPUT DELAY TIME

Output Delay Time t^PLHis defined as follows:

1. In the case of Nch Open Drain Output:

Under the condition of the output pin (OUT) is pulled up through a resistor of 470kΩ to 5V, the time interval between the

rising edge of V^DDpulse from 0.7V to (+V^DET)+ 2.0V and becoming of the output voltage to 2.5V.

2. In the case of CMOS Output:

The time interval between the rising edge of V^DDpulse from 0.7V to (+V^DET)+ 2.0V and becoming of the output voltage to

(V^DD/2) V.

+VDET + 2.0V

Input Voltage

(V^DD

Input Voltage

(V^DD

)

0.7V

GND

0.7V

GND

5.0V

+V^DET+2.0V

Output Voltage

+V^DET+2.0V

2.5V

GND

tPHL

tPLH

tPHL

tPLH

Nch Open Drain Output

CMOS Output

Rev.1.10

- 2 -

■ SELECTION GUIDE

The package type, the detector threshold, the output type and the taping type of R3111 Series can be designated at the users’

request by specifying the part number as follows;

R3111×××1×-×× ←Part Number

↑ ↑ ↑ ↑

a b c d

Code

Contents

Designation of Package Type;

E: TO-92

H: SOT-89

Q: SC-82AB

N: SOT-23-5

Setting Detector Threshold (-V^DET);

Stepwise setting with a step of 0.1V in the range of 0.9V to 6.0V is possible.

Designation of Output Type;

A: Nch Open Drain

C: CMOS

Designation of Packing or Taping Type ;

Ex.TO-92: TZ, SOT-89: T1,

SOT-23-5, SC-82AB: TR are prescribed as standard directions.

(Refer to Taping Specifications.) Antistatic bag for samples: C

Rev.1.10

- 3 -

■ PIN CONFIGURATION

●

TO-92

SOT-89

SOT-23-5

SC-82AB

(mark side)

■ PIN DESCRIPTION

●

TO-92

SOT-89

SOT-23-5

SC-2AB

Pin No.

Symbol

V^DD

GND

OUT

Pin No.

Symbol

OUT

V^DD

Pin No. Symbol

Pin No.

Symbol

OUT

V^DD

GND

OUT

V^DD

GND

■ ABSOLUTE MAXIMUM RATINGS

Symbol

V^DD

Item

Rating

V^SS-0.3 to V^DD+0.3

Unit

Supply Voltage

V^OUT1

V^OUT2

I^OUT

P^D

Output Voltage (CMOS)

Output Voltage (Nch)

Output Current

V^SS-0.3 to 12

300

150

Power Dissipation 1*^Note1

Power Dissipation 2*^Note2

Operating Temperature

Range

Topt

Tstg

-40 to 85

°C

Storage Temperature

Range

-55 to 125

Lead temperature

(Soldering)

Tsolder

260°C, 10s

*Note 1: applied to SOT-89 and TO-92

*Note 2: applied to SOT-23-5 and SC-82AB

Rev.1.10

- 4 -

■ ELECTRICAL CHARACTERISTICS

●

R3111x091A/C

Symbol

-V^DET

Topt=25°C

Item

Conditions

MIN.

TYP. MAX.

Unit

Detector Threshold

0.882 0.900 0.918

0.027 0.045 0.063

V^HYS

Detector Threshold Hysteresis

V^DD=0.80V

0.8

0.9

2.4

2.7

0.70

0.80

I^SS

Supply Current

µA

2.90V

V^DDH

V^DDL

Maximum Operating Voltage

0.55

0.65

Topt=25°C

-40°C≤Topt≤85°C

Nch

Minimum Operating

Voltage*^Note1

V^DS=0.05V,V^DD=0.70V

V^DS=0.50V,V^DD=0.85V

Pch

0.01

0.05

0.50

Output Current

(Driver Output Pin)

I^OUT

µs

V^DS=-2.1V,V^DD=4.5V

1.0

2.0

t^PLH

Output Delay Time*^Note2

Detector Threshold Temperature

Coefficient

100

∆-V^DET/∆T

-40°C≤Topt≤85°C

±100

ppm/°C

●

R3111x181A/C

Symbol

-V^DET

Topt=25°C

Item

Conditions

MIN.

TYP. MAX.

Unit

Detector Threshold

1.764 1.800 1.836

0.054 0.090 0.126

V^HYS

Detector Threshold Hysteresis

V^DD=1.70V

3.80V

0.8

1.0

2.4

3.0

0.70

0.80

I^SS

Supply Current

µA

V^DDH

V^DDL

Maximum Operating Voltage

Minimum Operating

Voltage*^Note1

0.55

0.65

Topt=25°C

-40°C≤Topt≤85°C

Nch

V^DS=0.05V,V^DD=0.70V

V^DS=0.50V,V^DD=0.85V

Pch

0.01

1.00

0.05

2.00

Output Current

(Driver Output Pin)

I^OUT

µs

V^DS=-2.1V,V^DD=4.5V

1.0

2.0

t^PLH

Output Delay Time*^Note2

Detector Threshold Temperature

Coefficient

100

∆-V^DET/∆T

-40°C≤Topt≤85°C

±100

ppm/°C

Rev.1.10

- 5 -

●

R3111x271A/C

Symbol

-V^DET

Topt=25°C

Item

Conditions

MIN.

TYP. MAX.

Unit

Detector Threshold

Detector Threshold Hysteresis

2.646 2.700 2.754

0.081 0.135 0.189

V^HYS

V^DD=2.60V

0.9

1.1

2.7

3.3

0.70

0.80

I^SS

Supply Current

µA

4.70V

V^DDH

V^DDL

Maximum Operating Voltage

Minimum Operating

Voltage*^Note1

0.55

0.65

Topt=25°C

-40°C≤Topt≤85°C

Nch

V^DS=0.05V,V^DD=0.70V

V^DS=0.50V,V^DD=1.50V

Pch

0.01

1.00

0.05

2.00

Output Current

(Driver Output Pin)

I^OUT

µs

V^DS=-2.1V,V^DD=4.5V

1.0

2.0

t^PLH

Output Delay Time*^Note2

Detector Threshold Temperature

Coefficient

100

∆-V^DET/∆T

-40°C≤Topt≤85°C

±100

ppm/°C

●

R3111x361A/C

Symbol

-V^DET

Topt=25°C

Item

Conditions

MIN.

TYP. MAX.

Unit

Detector Threshold

Detector Threshold Hysteresis

3.528 3.600 3.672

0.108 0.180 0.252

V^HYS

V^DD=3.47V

5.60V

1.0

1.2

3.0

3.6

0.70

0.80

I^SS

Supply Current

µA

V^DDH

V^DDL

Maximum Operating Voltage

Minimum Operating

Voltage*^Note1

0.55

0.65

Topt=25°C

-40°C≤Topt≤85°C

Nch

V^DS=0.05V,V^DD=0.70V

V^DS=0.50V,V^DD=1.50V

Pch

0.01

1.00

0.05

2.00

Output Current

(Driver Output Pin)

I^OUT

µs

V^DS=-2.1V,V^DD=4.5V

1.0

2.0

t^PLH

Output Delay Time*^Note2

Detector Threshold Temperature

Coefficient

100

∆-V^DET/∆T

-40°C≤Topt≤85°C

±100

ppm/°C

Rev.1.10

- 6 -

●

R3111x451A/C

Symbol

-V^DET

Topt=25°C

Item

Conditions

MIN.

TYP. MAX.

Unit

Detector Threshold

Detector Threshold Hysteresis

4.410 4.500 4.590

0.135 0.225 0.315

V^HYS

V^DD=4.34V

1.1

1.3

3.3

3.9

0.70

0.80

I^SS

Supply Current

µA

6.50V

V^DDH

V^DDL

Maximum Operating Voltage

Minimum Operating

Voltage*^Note1

0.55

0.65

Topt=25°C

-40°C≤Topt≤85°C

Nch

V^DS=0.05V,V^DD=0.70V

V^DS=0.50V,V^DD=1.50V

Pch

0.01

1.00

0.05

2.00

Output Current

(Driver Output Pin)

I^OUT

µs

V^DS=-2.1V,V^DD=8.0V

1.5

3.0

t^PLH

Output Delay Time*^Note2

Detector Threshold Temperature

Coefficient

100

∆-V^DET/∆T

-40°C≤Topt≤85°C

±100

ppm/°C

●

R3111x541A/C

Symbol

-V^DET

Topt=25°C

Item

Conditions

MIN.

TYP. MAX.

Unit

Detector Threshold

Detector Threshold Hysteresis

5.292 5.400 5.508

0.162 0.270 0.378

V^HYS

V^DD=5.20V

7.40V

1.2

1.4

3.6

4.2

0.70

0.80

I^SS

Supply Current

µA

V^DDH

V^DDL

Maximum Operating Voltage

0.55

0.65

Topt=25°C

-40°C≤Topt≤85°C

Nch

Minimum Operating

Voltage*^Note1

V^DS=0.05V,V^DD=0.70V

V^DS=0.50V,V^DD=1.50V

Pch

0.01

1.00

0.05

2.00

Output Current

(Driver Output Pin)

I^OUT

µs

V^DS=-2.1V,V^DD=8.0V

1.5

3.0

t^PLH

Output Delay Time*^Note2

Detector Threshold Temperature

Coefficient

100

∆-V^DET/∆T

-40°C≤Topt≤85°C

±100

ppm/°C

*Note1: Minimum Operating Voltage means the value of input voltage when output voltage maintains 0.1V or less.

(In the case of Nch Open Drain Type, Output pin is pulled up with a resistance of 470kΩ to 5.0V.)

*Note2: In the case of CMOS Output Type: The time interval between the rising edge of V^DDinput pulse from 0.7V to

(+V^DET)+2.0V and output voltage level becoming to V^DD/2.

In the case of Nch Open Drain Output Type: Output pin is pulled up with a resistance of 470kΩ to 5.0V, The

time interval between the rising edge of V^DDinput pulse from 0.7V to (+V^DET)+2.0V and output voltage level

becoming to 2.5V.

Rev.1.10

- 7 -

■ ELECTRICAL CHARACTERISRICS BY DETECTOR THRESHOLD

●

R3111x09x to R3111x60x

Detector Threshold

Hysteresis

Detector Threshold

Supply Current 1

Supply Current 2

Part

Number

-V^DET[V]

V^HYS[V]

^SS1µ

[ A]

^SS2µ

I [ A]

MIN.

0.882

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

4.998

5.096

5.194

5.292

5.390

5.488

5.586

5.684

5.782

5.880

TYP.

0.900

1.000

1.100

1.200

1.300

1.400

1.500

1.600

1.700

1.800

1.900

2.000

2.100

2.200

2.300

2.400

2.500

2.600

2.700

2.800

2.900

3.000

3.100

3.200

3.300

3.400

3.500

3.600

3.700

3.800

3.900

4.000

4.100

4.200

4.300

4.400

4.500

4.600

4.700

4.800

4.900

5.000

5.100

5.200

5.300

5.400

5.500

5.600

5.700

5.800

5.900

6.000

MAX.

0.918

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

5.202

5.304

5.406

5.508

5.610

5.712

5.814

5.916

6.018

6.120

MIN.

TYP.

0.045

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

0.255

0.260

0.265

0.270

0.275

0.280

0.285

0.290

0.295

0.300

MAX.

Condition

TYP.

MAX.

Condition

TYP.

0.9

MAX.

2.7

R3111x091x

R3111x101x

R3111x111x

R3111x121x

R3111x131x

R3111x141x

R3111x151x

R3111x161x

R3111x171x

R3111x181x

R3111x191x

R3111x201x

R3111x211x

R3111x221x

R3111x231x

R3111x241x

R3111x251x

R3111x261x

R3111x271x

R3111x281x

R3111x291x

R3111x301x

R3111x311x

R3111x321x

R3111x331x

R3111x341x

R3111x351x

R3111x361x

R3111x371x

R3111x381x

R3111x391x

R3111x401x

R3111x411x

R3111x421x

R3111x431x

R3111x441x

R3111x451x

R3111x461x

R3111x471x

R3111x481x

R3111x491x

R3111x501x

R3111x511x

R3111x521x

R3111x531x

R3111x541x

R3111x551x

R3111x561x

R3111x571x

R3111x581x

R3111x591x

R3111x601x

0.027

0.030

0.033

0.036

0.039

0.042

0.045

0.048

0.051

0.054

0.057

0.060

0.063

0.066

0.069

0.072

0.075

0.078

0.081

0.084

0.087

0.090

0.093

0.096

0.099

0.102

0.105

0.108

0.111

0.114

0.117

0.120

0.123

0.126

0.129

0.132

0.135

0.138

0.141

0.144

0.147

0.150

0.153

0.156

0.159

0.162

0.165

0.168

0.171

0.174

0.177

0.180

0.063

0.070

0.077

0.084

0.091

0.098

0.105

0.112

0.119

0.126

0.133

0.140

0.147

0.154

0.161

0.168

0.175

0.182

0.189

0.196

0.203

0.210

0.217

0.224

0.231

0.238

0.245

0.252

0.259

0.266

0.273

0.280

0.287

0.294

0.301

0.308

0.315

0.322

0.329

0.336

0.343

0.350

0.357

0.364

0.371

0.378

0.385

0.392

0.399

0.406

0.413

0.420

0.8

2.4

1.0

1.1

1.2

1.3

3.0

3.3

3.6

3.9

V^DD=

(-V^DET)

-0.10V

0.9

1.0

1.1

2.7

3.0

3.3

V^DD=

(-V^DET)

+2.0V

V^DD=

(-V^DET)

-0.13V

V^DD=

(-V^DET)

-0.16V

V^DD=

(-V^DET)

-0.20V

1.2

3.6

1.4

4.2

Note 1:In the case of CMOS Output parts; when the voltage is forced to V^DDfrom 0.7V to (+V^DET)+2.0V, time interval between the rising edge of V^DDand

the reaching point at 50% of Output Voltage. In the case of Nch open Drain Output parts : Output pin is pulled up to 5V through 470kΩ,and when

the voltage is forced to V^DDfrom 0.7V to (+V^DET)+2.0V, time interval between the rising edge of V^DDand the reaching point ar 50% of Output

Voltage.

Note 2:V^DDvalue when Output Voltage is equal or less than 0.1V. In the case of Nch Open Drain Output parts, Output pin is pulled up to 5V through

470kΩ resistor.

Condition 1: Topt=25°C

Condition 2: -40°C≤Topt≤85°C

Rev.1.10

- 8 -

Output Delay

Time

Minim um Operating

Voltage

Detector Threshold

Tem perature Coefficient

Output Current 1

I^OUT1[mA]

Output Current 2

I^OUT2[mA]

MIN.

^PLHµ

[ s]

V^DDL[V]

∆

^DET∆

V / T[ppm/ C]

Condition

MIN.

TYP.

Condition

TYP.

MAX.

TYP.

MAX.

Condition

TYP.

V^DD=

0.85V

0.05

0.5

V^DD=

0.2

1.0

1.0V

Note 2

Condi- Condi-

Nch

V^DS=0.05V

V^DD=0.7V

Nch

V^DS=

0.5V

tion 1

0.55

tion 1

0.70

-40°C≤

Topt

≤85°C

Note 1

100

0.01

0.05

±100

Condi- Condi-

tion 2

0.65

tion 2

0.80

V^DD=

1.0

2.0

1.5V

Rev.1.10

- 9 -

■ OPERATION

Pch

Nch

OUT

GND

Comparator

Vref

Figure 1. Block Diagram

Step

Comparator

Pin Input Voltage

III

Released Voltage(+V^DET

Supply Voltage Detector Threshold(-V^DET

)

Inde-

finite

Inde-

finite

Inde-

finite

Inde-

finite

Detector Threshold

Hysteresis

Comparator Output

Tr.1

)

(VDD

)

OFF

Minimum Operating Voltage

GND

Pch

Output Tr.

Nch

OFF

Output Voltage

(V^OUT

)

Rb + Rc

Ra + Rb + Rc

V^DD

II.

V^DD

Ra + Rb

GND

PLH

Figure 2. Operation Diagram

Step 1. Output Voltage is equal to Supply Voltage (V^DD).

Step 2. At Point “A”, Vref≥V^DD×(Rb+Rc)/(Ra+Rb+Rc) is true, as a result, the output of comparator is reverse, and

output voltage becomes to GND level. The voltage level of Point A means detector threshold voltage, or

(-V^DET).

Step 3. When the supply voltage is less than minimum operating voltage, the operation of output transistor becomes

indefinite, and in the case that output is pulled up to V^DD, Output voltage equals to V^DDvoltage.

Step 4. Output Voltage equals to GND level.

Step 5. At Point “B”, Vref≤V^DD×Rb/(Ra+Rb) is true, Output of the comparator is reverse, and output voltage is equal to

the supply voltage, or (V^DD). The voltage level of Point B means released voltage, or (+V^DET).

* The difference between Released Voltage and Detector Threshold Voltage is Detector Threshold Hysteresis.

Rev.1.10

- 10 -

■ TEST CIRCUITS

5.0V

470K

VDD

R3111

Series

VOUT

R3111

Series

VIN

OUT

GND

*Pull-up circuit is not necessary for

CMOS Output type, or R3111XXXXC

Figure 3. Supply Current Test Circuit

Figure 4. Detector Threshold Test Circuit

VDS

VDD

OUT

I^OUT

R3111

Series

R3111X

Series

VIN

V^IN

OUT

VDD- VDS

VDS

GND

*Apply only to CMOS

Figure 5. Nch Driver Output Current Test Circuit

Figure 6. Pch Driver Output Current Test Circuit

+5.0V

OUT

100K

+VDET+2.0V

0.7V

+VDET+2.0V

0.7V

470K

OUT

470K

OUT

R3111^XXX1A

Series

R3111^XXX1A

Series

OUT

P.G.

OUT

CIN

GND

COUT

VSS

Figure 7. Output Delay Time Test Circuit (1)

Figure 8. Output Delay Time Test Circuit (2)

Rev.1.10

- 11 -

■ TYPICAL CHARACTERISTICS

1) Supply Current vs. Input Voltage

R3111x091C

R3111x271C

2.5

2.0

1.5

1.0

Topt=85°C

2.0

1.5

1.0

0.5

0.0

25°C

-40°C

0.5

0.0

Input Voltage VIN(V)

R3111x451C

2.0

Topt=85°C

25°C

1.5

1.0

0.5

0.0

-40°C

Input Voltage VIN(V)

2) Detector Threshold Hysteresis vs. Temperature

R3111x091C

R3111x271C

1.00

2.9

2.8

2.7

0.98

0.96

+VDET

-VDET

0.94

+VDET

0.92

0.90

-VDET

0.88

2.6

2.5

0.86

0.84

-60 -40 -20

20 40 60 80 100

-60 -40 -20

20 40 60 80 100

Temperature Topt(°C)

Rev.1.10

- 12 -

R3111x451C

4.8

4.7

4.6

+VDET

4.5

4.4

-VDET

-60 -40 -20

20 40 60 80 100

Temperature Topt(°C)

3) Output Voltage vs. Input Voltage

R3111x091C

R3111x091A

DD Pull-up 470kΩ

5V Pull-up 470kΩ

1.6

1.4

1.2

1.0

0.8

0.6

0.4

Topt=-40°C

25°C

85°C

25°C

Topt=-40°C

85°C

0.2

0.0

0.2 0.4 0.6 0.8

1.2 1.4 1.6

0.2 0.4 0.6 0.8

1.2 1.4 1.6

Input Voltage VIN(V)

R3111x271C

R3111x271A

VDD Pull-up 470kΩ

5V Pull-up 470kΩ

4.0

3.5

3.0

2.5

2.0

1.5

1.0

Topt=-40°C

25°C

85°C

25°C

Topt=-40°C

1.5

Input Voltage VIN(V)

0.5

0.0

0.5

2.5

3.5

0.5

1.5

2.5

3.5

Input Voltage VIN(V)

Rev.1.10

- 13 -

R3111x451C

R3111x451A

VDD Pull-up 470kΩ

5V Pull-up 470kΩ

Topt=-40°C

25°C

85°C

25°C

Topt=-40°C

Input Voltage VIN(V)

4) Nch Driver Output Current vs. V^DS

R3111x091C

Topt=25°C

700

300

600

250

200

150

100

DD=0.85V

VDD=0.8V

500

400

300

200

0.7V

100

0.2

0.4

DS(V)

0.6

0.8

0.02

0.04

0.06

0.08

0.1

DS(V)

R3111x271C

Topt=25°C

300

250

200

150

100

DD=2.5V

2.0V

DD=0.8V

0.7V

1.5V

0.5

1.5

DS(V)

2.5

0.02

0.04

0.06

0.08

0.1

VDS(V)

Rev.1.10

- 14 -

R3111x451C

Topt=25°C

300

250

200

150

100

DD=4.5V

4.0V

DD=0.8V

3.5V

3.0V

0.7V

2.5V

2.0V

1.5V

1.5

0.5

2.5

3.5

4.5

0.02

0.04

0.06

0.08

0.1

VDS(V)

5) Nch Driver Output Current vs. Input Voltage

R3111x091C

R3111x271C

900

800

700

600

Topt=-40°C

25°C

85°C

500

Topt=-85°C

400

300

25°C

200

100

-40°C

0.2

0.4

0.6

0.8

0.5

1.5

2.5

Input Voltage VIN(V)

R3111x451C

Topt=-40°C

25°C

85°C

Input Voltage VIN(V)

Rev.1.10

- 15 -

6) Pch Driver Output Current vs. Input Voltage

R3111x091C

R3111x271C

Topt=25°C

1.4

3.5

3.0

2.5

2.0

1.5

1.0

1.2

DS=0.7V

VDS=2.1V

1.0

0.8

0.6

0.4

1.5V

1.0V

0.5V

0.2

0.0

0.5

0.0

Input Voltage VIN(V)

R3111x451C

Topt=25°C

4.5

4.0

3.5

3.0

2.5

2.0

1.5

1.0

DS=2.1V

1.5V

1.0V

0.5V

0.5

0.0

Input Voltage VIN(V)

7) Output Delay Time vs. Load Capacitance

R3111x091A

R3111x271A

100

tPLH

0.1

tPHL

0.01

tPHL

0.01

0.001

0.0001

0.001

0.01

0.1

0.0001

0.001

0.01

0.1

Load Capacitance COUT(µF)

Rev.1.10

- 16 -

R3111x451A

100

PLH

PHL

0.1

0.01

0.001

0.0001

0.001

0.01

0.1

Load Capacitance COUT(µF)

8) Output Delay Time vs. Input Pin Capacitance

R3111x091A

R3111x271A

100

PLH

PHL

PLH

PHL

0.1

0.01

0.001

0.0001

0.001

0.01

0.1

0.0001

0.001

0.01

0.1

Input Pin Capacitance CIN(µF)

Input Load Capacitance CIN(µF)

R3111x451A

100

PLH

PHL

0.1

0.01

0.001

0.01

0.1

Input Pin Capacitance CIN(µF)

Rev.1.10

- 17 -

■ TYPICAL APPLICATION

●

R3111xxx1A CPU Reset Circuit (Nch Open Drain Output)

Case 1.Input Voltage to R3111xxx1A is equal to

Input Voltage to CPU

Case 2.Input Voltage to R3111xxx1A is unequal to

Input Voltage to CPU

VDD1

VDD

VDD2

VDD

470K

VDD

CPU

RESET

GND

CPU

RESET

GND

R3111XXX1A

SERIES

R3111^XXX1A

SERIES

OUT

GND

●

R3111xxx1A CPU Reset Circuit CMOS Output

VDD

CPU

RESET

GND

R3111XXX1C

SERIES

OUT

GND

●

R3111xxx1A Output Delay Time Circuit 1

(Nch Open Drain Output)

R3111xxx1A Output Delay Time Circuit 2

(Nch Open Drain Output)

VDD

CPU

RESET

GND

470K

R3111XXX1A

470K

100K

CPU

R3111XXX1A

SERIES

RESET

GND

SERIES

OUT

VDD

OUT

GND

●

Memory Back-up Circuit

RAM1

RAM2

RAM3

RAM4

GND CS GND CS GND CS GND CS

GND

OUT

R3111^XXX1C

SERIES

GND

Rev.1.10

- 18 -

●

Voltage level Indicator Circuit (lighted when the power runs out)

(Nch Open Drain Output)

VDD

R3111XXX1A

SERIES

OUT

GND

●

Detector Threshold Adjustable Circuit

(Nch Open Drain Type Output)

Adjusted Detector Threshold

=(-V^DET)*(Ra+Rb)/Rb

Hysteresis Voltage

OUT

R3111XXX1A

SERIES

HYS

=(V )*(Ra+Rb)/Rb

*) If the value of Ra is set excessively large, voltage drop may occur

caused by the supply current of IC itself, and detector threshold may

vary.

GND

●

Window Comparator Circuit

(Nch Open Drain Output)

VDET1

VDET2

OUT

R3111XXX1A

SERIES

OUT

VDET2

OUT

GND

R3111XXX1A

SERIES

OUT

VDET1

GND

●

Over-charge Preventing Circuit

Light

R3111XXX1C

SERIES

OUT

GND

Rev.1.10

- 19 -

TECHNICAL NOTES

OUT

R3111

SERIES

OUT

R3111

SERIES

GND

Figure 9

Figure 10

1. In Figure 9, When R3111xxx1C is used, and if an impedance is connected in between Voltage Supplier and the V^DD

Pin of R3111xxx1C Series, the operation might be unstable by through-type current at detection.

When R3111xxx1A is used in Figure 9, if the value of R is set excessively large, voltage drop may occur caused by

supply crrent of IC itself and Detector threshold may vary.

2. Wiring as shown in Figure 10 may cause the oscillation in both output types of R3111 Series.

Rev.1.10

- 20 -

R3111E521C [RICOH]

相关型号：

SI9130DB

SI9135LG-T1

SI9135LG-T1-E3

SI9135_11

SI9136_11

SI9130CG-T1-E3

SI9130LG-T1-E3

SI9130_11

SI9137

SI9137DB

SI9137LG

SI9122E