R3111N281B-TR-F [RICOH]

Power Supply Support Circuit, Fixed, 1 Channel, CMOS, PDSO5, LEAD FREE, SOT-23, 5 PIN;


型号：	R3111N281B-TR-F
厂家：	RICOH ELECTRONICS DEVICES DIVISION
描述：	Power Supply Support Circuit, Fixed, 1 Channel, CMOS, PDSO5, LEAD FREE, SOT-23, 5 PIN ISM频段光电二极管
文件：	总27页 (文件大小：376K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

R3111x SERIES

LOW VOLTAGE DETECTOR

OUTLINE

NO.EA-056-091102

The R3111x series are CMOS-based voltage detector ICs with high detector threshold accuracy and ultra-low

supply current, 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.

Three output types, Nch open drain “L” type, Nch open drain “H” type and CMOS type are available.

The R3111x Series are operable at a lower voltage than that for the Rx5VL series, and can be driven by a

single battery.

Seven types of packages, TO-92, SOT-89, SOT-23-3, SOT-23-5, SC-82AB, SC-88A and SON1612-6 are

available.

FEATURES

• Supply Current......................................................................Typ. 0.8μA (-VDET=1.5V, VDD=-VDET−0.1V)

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

• Detector Threshold Range....................................................0.9V to 6.0V

• Detector Threshold Accuracy................................................±2.0%

• Temperature-Drift Coefficient of Detector Threshold ............Typ. ±100ppm/°C

• Output Types.........................................................................Nch Open Drain “L”, Nch Open Drain “H”, and

CMOS

• Packages ..............................................................................TO-92, SOT-89, SOT-23-3, SOT-23-5,

SC-82AB, SC-88A, SON1612-6

APPLICATIONS

• CPU and Logic Circuit Reset

• Battery Checker

• Window Comparator

• Wave Shaping Circuit

• Battery Back-up Circuit

• Power Failure Detector

R3111x

BLOCK DIAGRAMS

R3111xxxxA

R3111xxxxB

OUT

GND

OUT

GND

Vref

R3111xxxxC

OUT

GND

Vref

R3111x

SELECTION GUIDE

The package type, the detector threshold, the output type and the taping type for the ICs can be selected at

the users’ request. The selection can be made with designating the part number as shown below;

R3111xxxxx-xx-x ← Part Number

↑ ↑ ↑ ↑

a b c d

↑

Code

Contents

Designation of Package Type;

R3111Dxx1x: SON1612-6

R3111Exx1x: TO-92

R3111Hxx1x: SOT-89

R3111Nxx1x: SOT-23-5

R3111Nxx2x: SOT-23-3

R3111Qxx1x: SC-82AB

R3111Qxx2x: SC-88A

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 Package Type

1: except SOT-23-3, SC-88A

2: SOT-23-3, SC-88A

Designation of Output Type;

A: Nch Open Drain (Output "L" at V^DD=-VDET)

B: Nch Open Drain (Output "H" at V^DD=-VDET)

C: CMOS (Output "L" at V^DD=-VDET)

Designation of Packing or Taping Type ;

Ex.TO-92: TZ, SOT-89: T1, SOT-23-3, SOT-23-5, SC-82AB, SC-88A, SON1612-6: TR

prescribed as standard directions.

(Refer to Taping Specifications.) Antistatic bag for TO-92: C

Designation of Composition of pin plating

-F: Lead free solder plating

(TO-92, SOT-89, SOT-23-3, SOT-23-5, SC-82AB, SC-88A, SON1612-6)

R3111x

PIN CONFIGURATIONS

z TO-92

z SOT-89

z SOT-23-3

z SOT-23-5

(mark side)

z SC-82AB

z SC-88A

z SON1612-6

(mark side)

PIN DESCRIPTIONS

z TO-92

z SOT-89

z SOT-23-3

z SOT-23-5

Pin No.

Symbol

VDD

Pin No.

Symbol

OUT

Pin No.

Symbol

OUT

Pin No.

Symbol

OUT

VDD

GND

OUT

VDD

GND

VDD

GND

z SC-82AB

z SC-88A

z SON1612-6

Pin No.

Symbol

OUT

VDD

Pin No.

Symbol

OUT

Pin No.

Symbol

OUT

VDD

GND

VDD

R3111x

ABSOLUTE MAXIMUM RATINGS

Symbol

Item

Rating

Unit

VDD

Supply Voltage

VOUT1

VOUT2

IOUT

Output Voltage (CMOS)

V^SS−0.3 to VDD+0.3

Output Voltage (Nch)

V^SS−0.3 to 12

Output Current

Power Dissipation (TO-92)*

Power Dissipation (SOT-89)*

Power Dissipation (SOT-23-3)*

Power Dissipation (SOT-23-5)*

Power Dissipation (SC-82AB)*

Power Dissipation (SC-88A)*

Power Dissipation (SON1612-6)*

Operating Temperature Range

Storage Temperature Range

Lead temperature (Soldering)

300

900

420

380

500

Topt

Tstg

−40 to 85

−55 to 125

°C

Tsolder

260°C, 10s

* ) For Power Dissipation, please refer to PACKAGE INFORMATION.

ABSOLUTE MAXIMUM RATINGS

Electronic and mechanical stress momentarily exceeded absolute maximum ratings may cause the

permanent damages and may degrade the life time and safety for both device and system using the device

in the field. The functional operation at or over these absolute maximum ratings is not assured.

RECOMMENDED OPERATING CONDITIONS (ELECTRICAL CHARACTERISTICS)

All of electronic equipment should be designed that the mounted semiconductor devices operate within the

recommended operating conditions. The semiconductor devices cannot operate normally over the

recommended operating conditions, even if when they are used over such conditions by momentary

electronic noise or surge. And the semiconductor devices may receive serious damage when they continue

to operate over the recommended operating conditions.

R3111x

ELECTRICAL CHARACTERISTICS

• R3111x09xA/C

Topt=25°C

Symbol

Item

Conditions

Min.

Typ.

Max.

Unit

-VDET

Detector Threshold

0.882 0.900 0.918

0.027 0.045 0.063

VHYS

Detector Threshold Hysteresis

V^DD=0.80V

V^DD=2.90V

0.8

0.9

2.4

2.7

ISS

Supply Current

μA

VDDH

Maximum Operating Voltage

0.55

0.65

0.70

0.80

Topt=25°C

Note1

Minimum Operating Voltage^∗

VDDL

−40°C Topt 85°C

Nch

V^DS=0.05V,VDD=0.70V

V^DS=0.50V,VDD=0.85V

0.01

0.05

0.50

IOUT

tPLH

Output Current (Driver Output Pin)

Pch

μs

1.0

2.0

V^DS=−2.1V,VDD=4.5V

Note2

Output Delay Time^∗

100

Δ-VDET/

ΔTopt

Detector Threshold Temperature

Coefficient

−40°C Topt 85°C

±100

ppm/°C

• R3111x18xA/C

Topt=25°C

Symbol

Item

Conditions

Min.

Typ.

Max.

Unit

-VDET

VHYS

Detector Threshold

1.764 1.800 1.836

0.054 0.090 0.126

Detector Threshold Hysteresis

V^DD=1.70V

V^DD=3.80V

0.8

1.0

2.4

3.0

ISS

Supply Current

μA

VDDH

Maximum Operating Voltage

0.55

0.65

0.70

0.80

Topt=25°C

Note1

Minimum Operating Voltage^∗

VDDL

−40°C Topt 85°C

Nch

V^DS=0.05V, VDD=0.70V

V^DS=0.50V, VDD=1.50V

0.01

1.00

0.05

2.00

IOUT

tPLH

Output Current (Driver Output Pin)

Pch

μs

1.0

2.0

V^DS=−2.1V,VDD=4.5V

Note2

Output Delay Time^∗

100

Δ-VDET/

ΔTopt

Detector Threshold Temperature

Coefficient

−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 Output type, the output pin is pulled up with a resistance of 470k to 5.0V.)

∗Note2:In the case of CMOS Output type: The time interval between the rising edge of VDD input pulse from 0.7V

to (+VDET)+2.0V and output voltage level becoming to ((+VDET)+2.0V)/2.

In the case of Nch Open Drain Output type: The output pin is pulled up with a resistance of 470kΩ to

5.0V, the time interval between the rising edge of VDD input pulse from 0.7V to (+VDET)+2.0V and output

voltage level becoming to 2.5V.

R3111x

• R3111x27xA/C

Topt=25°C

Symbol

Item

Conditions

Min.

Typ.

Max.

Unit

-VDET

VHYS

Detector Threshold

2.646 2.700 2.754

0.081 0.135 0.189

Detector Threshold Hysteresis

V^DD=2.60V

V^DD=4.70V

0.9

1.1

2.7

3.3

ISS

Supply Current

μA

VDDH

Maximum Operating Voltage

0.55

0.65

0.70

0.80

Topt=25°C

Note1

Minimum Operating Voltage^∗

VDDL

−40°C Topt 85°C

Nch

V^DS=0.05V,VDD=0.70V

V^DS=0.50V,VDD=1.50V

0.01

1.00

0.05

2.00

IOUT

tPLH

Output Current (Driver Output Pin)

Pch

μs

1.0

2.0

V^DS=−2.1V,VDD=4.5V

Note2

Output Delay Time^∗

100

Δ-VDET/

ΔTopt

Detector Threshold Temperature

Coefficient

−40°C Topt 85°C

±100

ppm/°C

• R3111x36xA/C

Topt=25°C

Symbol

Item

Conditions

Min.

Typ.

Max.

Unit

-VDET

VHYS

Detector Threshold

3.528 3.600 3.672

0.108 0.180 0.252

Detector Threshold Hysteresis

V^DD= 3.47V

V^DD= 5.60V

1.0

1.2

3.0

3.6

ISS

Supply Current

μA

VDDH

Maximum Operating Voltage

0.55

0.65

0.70

0.80

Topt=25°C

Note1

Minimum Operating Voltage^∗

VDDL

−40°C Topt 85°C

Nch

V^DS=0.05V,VDD=0.70V

V^DS=0.50V,VDD=1.50V

0.01

1.00

0.05

2.00

IOUT

tPLH

Output Current (Driver Output Pin)

Pch

μs

1.0

2.0

V^DS=−2.1V,VDD=4.5V

Note2

Output Delay Time^∗

100

Δ-VDET/

ΔTopt

Detector Threshold Temperature

Coefficient

−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 Output type, the output pin is pulled up with a resistance of 470k to 5.0V.)

∗Note2:In the case of CMOS Output type: The time interval between the rising edge of VDD input pulse from 0.7V

to (+VDET)+2.0V and output voltage level becoming to ((+VDET)+2.0V)/2.

In the case of Nch Open Drain Output type: The output pin is pulled up with a resistance of 470kΩ to

5.0V, the time interval between the rising edge of VDD input pulse from 0.7V to (+VDET)+2.0V and output

voltage level becoming to 2.5V.

R3111x

• R3111x45xA/C

Topt=25°C

Symbol

Item

Conditions

Min.

Typ.

Max.

Unit

-VDET

VHYS

Detector Threshold

4.410 4.500 4.590

0.135 0.225 0.315

Detector Threshold Hysteresis

V^DD=4.34V

V^DD=6.50V

1.1

1.3

3.3

3.9

ISS

Supply Current

μA

VDDH

Maximum Operating Voltage

0.55

0.65

0.70

0.80

Topt=25°C

Note1

Minimum Operating Voltage^∗

VDDL

−40°C Topt 85°C

Nch

V^DS=0.05V, VDD=0.70V

V^DS=0.50V, VDD=1.50V

0.01

1.00

0.05

2.00

IOUT

tPLH

Output Current (Driver Output Pin)

Pch

μs

1.5

3.0

V^DS=−2.1V,VDD=8.0V

Note2

Output Delay Time^∗

100

Δ-VDET/

ΔTopt

Detector Threshold Temperature

Coefficient

−40°C Topt 85°C

±100

ppm/°C

• R3111x54xA/C

Topt=25°C

Symbol

Item

Conditions

Min.

Typ.

Max.

Unit

-VDET

VHYS

Detector Threshold

5.292 5.400 5.508

0.162 0.270 0.378

Detector Threshold Hysteresis

V^DD=5.20V

V^DD=7.40V

1.2

1.4

3.6

4.2

ISS

Supply Current

μA

VDDH

Maximum Operating Voltage

0.55

0.65

0.70

0.80

Topt=25°C

Note1

Minimum Operating Voltage^∗

VDDL

−40°C Topt 85°C

Nch

V^DS=0.05V, VDD=0.70V

V^DS=0.50V, VDD=1.50V

0.01

1.00

0.05

2.00

Output Current

(Driver Output Pin)

IOUT

tPLH

Pch

μs

1.5

3.0

V^DS=−2.1V, VDD=8.0V

Note2

Output Delay Time^∗

100

Δ-VDET/

ΔTopt

Detector Threshold Temperature

Coefficient

−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 Output type, the output pin is pulled up with a resistance of 470k to 5.0V.)

∗Note2:In the case of CMOS Output type: The time interval between the rising edge of VDD input pulse from 0.7V

to (+VDET)+2.0V and output voltage level becoming to ((+VDET)+2.0V)/2.

In the case of Nch Open Drain Output type: The output pin is pulled up with a resistance of 470kΩ to

5.0V, the time interval between the rising edge of VDD input pulse from 0.7V to (+VDET)+2.0V and output

voltage level becoming to 2.5V.

R3111x

• R3111Q231B

Topt=25°C

Symbol

Item

Conditions

Min.

Typ.

Max.

Unit

-VDET

VHYS

Detector Threshold

2.254 2.300 2.346

0.069 0.115 0.161

Detector Threshold Hysteresis

V^DD=2.2V

V^DD=4.3V

0.9

1.1

2.7

3.3

ISS

Supply Current

μA

VDDH

Maximum Operating Voltage

0.55

0.65

0.70

0.80

Topt=25°C

Note1

Minimum Operating Voltage^∗

VDDL

−40°C Topt 85°C

Nch

V^DS=0.10V,VDD=6.5V

IOUT

tPLH

Output Current (Driver Output Pin)

2.5

μs

Note2

Output Delay Time^∗

100

Δ-VDET/

ΔTopt

Detector Threshold Temperature

Coefficient

−40°C Topt 85°C

±100

ppm/°C

• R3111Q441B

Topt=25°C

Symbol

Item

Conditions

Min.

Typ.

Max.

Unit

-VDET

VHYS

Detector Threshold

4.312 4.400 4.488

0.132 0.220 0.308

Detector Threshold Hysteresis

V^DD=4.24V

V^DD=6.4V

1.1

1.3

3.3

3.9

ISS

Supply Current

μA

VDDH

Maximum Operating Voltage

0.55

0.65

0.70

0.80

Topt=25°C

Note1

Minimum Operating Voltage^∗

VDDL

−40°C Topt 85°C

Nch

V^DS=0.10V, VDD=6.5V

Output Current

(Driver Output Pin)

Output Delay Time^∗

IOUT

tPLH

2.5

μs

Note2

100

Δ-VDET/

ΔTopt

Detector Threshold Temperature

Coefficient

−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 Output type, the output pin is pulled up with a resistance of 470k to 5.0V.)

∗Note2:In the case of CMOS Output type: The time interval between the rising edge of VDD input pulse from 0.7V

to (+VDET)+2.0V and output voltage level becoming to ((+VDET)+2.0V)/2.

In the case of Nch Open Drain Output type: The output pin is pulled up with a resistance of 470kΩ to

5.0V, the time interval between the rising edge of VDD input pulse from 0.7V to (+VDET)+2.0V and output

voltage level becoming to 2.5V.

R3111x

TIMING CHART

Supply

Released Voltage +VDET

Voltage

Detector Threshold

Hysteresis

Detec tor T hr es hol d

Hysteresis

Detec tor Thr eshol d

Hysteresis

Detector Threshold -VDET

(VDD)

Minimum Operating Voltage V^DDL

GND

Pull-up Voltage

Output

Voltage

(VOUT)

GND

tPLH

R3111xxxxA

R 3111xxxxB

R3111xxxxC

DEFINITION OF OUTPUT DELAY TIME

Output Delay Time (tPLH) is defined as follows:

1. In the case of Nch Open Drain Output:(R3111xxxxA/B)

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 (+VDET)+2.0V and becoming of the output voltage to 2.5V.

2. In the case of CMOS Output:(R3111xxxxC)

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

voltage to ((+V^DET)+2.0V)/2.

DET

+V +2.0V

DET

+V +2.0V

DET

+V +2.0V

Supply

Voltage

(V )

Voltage

(V )

Voltage

(V )

0.7V

GND

0.7V

GND

0.7V

GND

5.0V

2.5V

GND

5.0V

2.5V

GND

DET

+V +2.0V

Output

Voltage

OUT

Output

Voltage

OUT

DET

+V +2.0V

Output

)

Voltage

GND

OUT

)

PHL

PLH

PHL

PLH

PHL

PLH

Nch Open Drain Output

(R3111xxxxA)

Nch Open Drain Output

(R3111xxxxB)

CMOS Output

(R3111xxxxC)

R3111x

ELECTRICAL CHARACTERISTICS BY DETECTOR THRESHOLD

• R3111x09x to R3111x60x

Detector Threshold

Supply Current 1

Supply Current 2

Hysteresis

Part

_-VDET[_V]

_VHYS[_V]

[

]

[

]

Number

I^SS1μA

Typ.

I^SS2μA

Typ.

Min.

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.

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.

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

Condition

Max.

Condition

Max.

2.7

R3111x09xx

R3111x10xx

R3111x11xx

R3111x12xx

R3111x13xx

R3111x14xx

R3111x15xx

R3111x16xx

R3111x17xx

R3111x18xx

R3111x19xx

R3111x20xx

R3111x21xx

R3111x22xx

R3111x23xx

R3111x24xx

R3111x25xx

R3111x26xx

R3111x27xx

R3111x28xx

R3111x29xx

R3111x30xx

R3111x31xx

R3111x32xx

R3111x33xx

R3111x34xx

R3111x35xx

R3111x36xx

R3111x37xx

R3111x38xx

R3111x39xx

R3111x40xx

R3111x41xx

R3111x42xx

R3111x43xx

R3111x44xx

R3111x45xx

R3111x46xx

R3111x47xx

R3111x48xx

R3111x49xx

R3111x50xx

R3111x51xx

R3111x52xx

R3111x53xx

R3111x54xx

R3111x55xx

R3111x56xx

R3111x57xx

R3111x58xx

R3111x59xx

R3111x60xx

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

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

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

0.9

0.8

2.4

1.0

3.0

3.3

3.6

3.9

VDD=

(-VDET)

−0.10V

0.9

1.0

1.1

2.7

3.0

3.3

1.1

1.2

1.3

VDD=

(-VDET)

−0.13V

+2.0V

VDD=

(-VDET)

−0.16V

VDD=

(-VDET)

1.2

3.6

1.4

4.2

−0.20V

*1) In the case of CMOS output type; when the voltage is forced to VDD from 0.7V to (

DET

)

2.0V, time interval between the rising edge of VDD and the reaching point at

2.0V)/2. In the case of Nch open drain output type : The output pin is pulled up to 5V through 470k , and when the voltage is forced to VDD from 0.7V to

2.0V, time interval between the rising edge of VDD and the reaching point at (( 2.0V)/2.

((

DET

)

(

DET

)

+VDET)+

*2) VDD value when Output Voltage is equal or less than 0.1V. In the case of Nch open drain output type, the output pin is pulled up to 5V through 470kΩ

resistor.

Condition 1: Topt=25°C

85°C

Condition 2: −40°C

Topt

R3111x

Output Delay

Time

Minimum

Operating Voltage

Detector Threshold

Temperature Coefficient

Output Current 2 *³

Output Current 1

[

]

[

]

[

]

_VDDL[_V]

[

]

IOUT1 mA

IOUT2 mA

t^PLHμs

Δ-VDET/ΔTopt ppm/°C

Condition Typ.

Condition

Min.

Typ.

Condition

Min.

Typ.

Max.

Typ.

Max.

VDD=

0.05

0.2

0.5

0.85V

VDD=

1.0V

1.0

Nch

0.01

0.05

VDS=0.05V

VDD=0.7V

Condition 1 Condition 1

Nch

VDS=

0.5V

−40°C

100 *¹

Topt

0.55

0.70

VDD=

1.5V

±100

1.0

2.0

85°C

Condition 2 Condition 2

0.65

0.80

Nch

2.5

VDS=0.10V

VDD=6.5V

*3) Only A/C versions.

R3111x

OPERATION

• Operation of R3111xxxxA

Comparator

OUT pin should be pulled-up to

OUT

or an external voltage level.

Vref

Nch

Tr.1

GND

Block Diagram (R3111xxxxA)

Step

Released Voltage +V^DET

Detector Threshold

Hysteresis

Comparator (+)

Pin Input Voltage

Detector Threshold

Supply Voltage

-V^DET

)

Comparator Output

Tr.1

Indefinite

Minimum Operating Voltage V^DDL

GND

OFF ON Indefinite ON OFF

Output Tr.

Nch OFF ON Indefinite ON OFF

Rb+Rc

Ra+Rb+Rc

Pull-up Voltage

×V

Output

Output Voltage

Delay Time

OUT

)

Ra+Rb

×V

PLH

GND

Operation Diagram

• Explanation of operation

Step 1. The output voltage is equal to the pull-up voltage.

Step 2. At Point “A”, Vref VDD×(Rb+Rc)/(Ra+Rb+Rc) is true, as a result, the output of comparator is reversed

from "H" to "L", therefore the output voltage becomes the GND level. The voltage level of Point A means

a detector threshold voltage (−V^DET).

Step 3. When the supply voltage is lower than the minimum operating voltage, the operation of the output

transistor becomes indefinite. The output voltage is equal to the pull-up voltage.

Step 4. The output Voltage is equal to the GND level.

Step 5. At Point “B”, Vref VDD×Rb/(Ra+Rb) is true, as a result, the output of comparator is reversed from "L" to

"H", then the output voltage is equal to the pull-up voltage. The voltage level of Point B means a released

voltage (+V^DET).

∗) The difference between a released voltage and a detector threshold voltage is a detector threshold hysteresis.

R3111x

• Operation of R3111xxxxB

Comparator

OUT pin should be pulled-up to

OUT

or an external voltage level.

Vref

Nch

Tr.1

GND

Block Diagram (R3111xxxxB)

Step

Released Voltage +V^DET

Detector Threshold

Hysteresis

Comparator (−)

Pin Input Voltage

Detector Threshold

Supply Voltage

-V^DET

)

Comparator Output

Tr.1

Minimum Operating Voltage V^DDL

GND

OFF ON OFF

ON OFF ON

Output Tr.

Nch

Rb+Rc

Ra+Rb+Rc

Pull-up Voltage

×V

Output

Output Voltage

Delay Time

OUT

)

Ra+Rb

×V

PLH

GND

Operation Diagram

• Explanation of operation

Step 1. The output voltage is equal to the GND level.

Step 2. At Point “A”, Vref VDD×(Rb+Rc)/(Ra+Rb+Rc) is true, as a result, the output of comparator is reversed

from "L" to "H", therefore the output voltage becomes the pull-up voltage. The voltage level of Point A

means a detector threshold voltage (−V^DET).

Step 3. At Point “B”, Vref VDD×Rb/(Ra+Rb) is true, as a result, the output of comparator is reversed from "H" to

"L", then the output voltage is equal to the GND level. The voltage level of Point B means a released

voltage (+V^DET).

∗) The difference between a released voltage and a detector threshold voltage is a detector threshold hysteresis.

R3111x

• Operation of R3111xxxxC

Comparator

Pch

Nch

OUT

GND

Vref

Tr.1

Block Diagram (R3111xxxxC)

Step

Released Voltage +V^DET

Detector Threshold

Hysteresis

Comparator (+)

Pin Input Voltage

Detector Threshold -V^DET

Supply Voltage

)

Comparator Output

Tr.1

Indefinite

Minimum Operating Voltage V^DDL

OFF ON Indefinite ON OFF

GND

Pch ON OFF Indefinite OFF ON

Nch OFF ON Indefinite ON OFF

Output Tr.

Rb+Rc

×V^DD

Output

Delay Time

Output Voltage

Ra+Rb+Rc

OUT

)

Ra+Rb

PLH

×V

GND

Operation Diagram

• Explanation of operation

Step 1. The output voltage is equal to the supply voltage (VDD).

Step 2. At Point “A”, Vref VDD×(Rb+Rc)/(Ra+Rb+Rc) is true, as a result, the output of comparator is reversed

from "H" to "L", therefore the output voltage becomes the GND level. The voltage level of Point A

means a detector threshold voltage (−V^DET).

Step 3. When the supply voltage is lower than the minimum operating voltage, the operation of the output

transistor becomes indefinite.

Step 4. The output Voltage is equal to the GND level.

Step 5. At Point “B”, Vref VDD×Rb/(Ra+Rb) is true, as a result, the output of comparator is reversed from "L" to

"H", then the output voltage is equal to the supply voltage (V^DD). The voltage level of Point B means a

released voltage (+V^DET).

∗) The difference between a released voltage and a detector threshold voltage is a detector threshold hysteresis.

R3111x

TEST CIRCUITS

470kΩ

R3111x

Series

OUT

R3111x

Series

OUT

GND

Supply Current Test Circuit

Detector Threshold Test Circuit

(Pull-up circuit is not necessary for

CMOS Output type.)

V^DD

OUT

R3111x

Series

R3111x

Series

OUT

−V

GND

Nch Driver Output Current Test Circuit

Pch Driver Output Current Test Circuit

∗Apply to CMOS Output type only

DET

+V +2.0V

DET

+V +2.0V

OUT

0.7V

GND

470kΩ

OUT

0.7V

GND

470kΩ

R3111x

Series

R3111x

Series

OUT

GND

P.G.

OUT

GND

Output Delay Time Test Circuit (1)

Output Delay Time Test Circuit (2)

(Pull-up circuit is not necessary for

CMOS Output type.)

R3111x

TYPICAL CHARACTERISTICS

1) Supply Current vs. Input Voltage

R3111x09xC

R3111x27xC

2.5

2.0

1.5

1.0

Topt=85°C

2.0

1.5

25°C

1.0

-40°C

0.5

0.0

0.5

0.0

Input Voltage VIN(V)

R3111x45xC

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

R3111x09xC

R3111x27xC

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)

R3111x

R3111x45xC

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

R3111x09xC

R3111x09xA

5V Pull-up 470kΩ

1.6

1.4

1.2

1.0

Topt=-40°C

25°C

0.8

85°C

0.6

25°C

0.4

85°C

Topt=-40°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 V^IN(V)

R3111x27xC

R3111x27xA

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 V^IN(V)

0.5

0.0

0.5

2.5

3.5

0.5

1.5

2.5

3.5

Input Voltage V^IN(V)

R3111x

R3111x45xC

R3111x45xA

5V Pull-up 470kΩ

Topt=-40°C

25°C

85°C

25°C

Topt=-40°C

Input Voltage V^IN(V)

4) Nch Driver Output Current vs. VDS

R3111x09xC

Topt=25°C

700

600

300

250

200

150

100

DD=0.85V

DD=0.8V

0.7V

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)

R3111x27xC

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)

R3111x

R3111x45xC

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

R3111x09xC

R3111x27xC

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)

Input Voltage V^IN(V)

R3111x45xC

Topt=-40°C

25°C

85°C

Input Voltage VIN(V)

R3111x

6) Pch Driver Output Current vs. Input Voltage

R3111x09xC

R3111x27xC

Topt=25°C

1.4

3.5

3.0

2.5

2.0

1.5

1.0

1.2

DS=0.7V

DS=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)

Input Voltage V^IN(V)

R3111x45xC

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 V^IN(V)

7) Output Delay Time vs. Load Capacitance (Topt=25°C)

R3111x09xA

R3111x27xA

100

tPLH

tPHL

tPLH

0.1

tPHL

0.01

0.001

0.0001

0.001

0.01

0.1

0.0001

0.001

0.01

0.1

Load Capacitance C^OUT(μF)

Load Capacitance COUT(μF)

R3111x

R3111x45xA

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

R3111x09xA

R3111x27xA

100

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 Pin Capacitance C^IN(μF)

R3111x45xA

100

PLH

PHL

0.1

0.01

0.001

0.01

0.1

Input Pin Capacitance C^IN(μF)

R3111x

TYPICAL APPLICATION

• R3111xxxxA CPU Reset Circuit (Nch Open Drain Output)

Case 1.Input Voltage to R3111xxxxA is equal to

Input Voltage to CPU

Case 2.Input Voltage to R3111xxxxA is unequal to

Input Voltage to CPU

V^DD

V^DD2

V^DD

470kΩ

V^DD

CPU

V^DD

CPU

RESET

R3111xxxxA

Series

R3111xxxxA

Series

RESET

GND

OUT

GND

• R3111xxxxC CPU Reset Circuit (CMOS Output)

V^DD

CPU

R3111xxxxC

Series

RESET

GND

OUT

GND

• R3111xxxxA Output Delay Time Circuit 1

• R3111xxxxA Output Delay Time Circuit 2

(Nch Open Drain Output)

V^DD

470kΩ

V^DD

CPU

470kΩ

100kΩ

R3111xxxxA

Series

CPU

RESET

GND

R3111xxxxA

Series

OUT

RESET

GND

OUT

GND

• Memory Back-up Circuit

RAM1

RAM2

RAM3

RAM4

GND CS GND CS GND CS GND CS

GND

OUT

R3111xxxxC

Series

GND

R3111x

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

(Nch Open Drain Output)

V^DD

R3111xxxxA

Series

OUT

GND

• Detector Threshold Adjustable Circuit

(Nch Open Drain Output)

Adjusted Detector Threshold

V^DD

=(−V^DET)×(Ra+Rb)/Rb

OUT

V^DD

R3111xxxxA

Series

Hysteresis Voltage

=(V^HYS)×(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)

DET

−V

DET

−V

V^DD

−V

^DET2

R3111xxxxA

Series

WC_OUT

OUT

GND

OUT

R3111xxxxA

Series

WC_OUT

−V

^DET1

GND

• Over-charge Preventing Circuit

Light

R3111xxxxC

Series

R3 OUT

GND

R3111x

TECHNICAL NOTES

When R3111xxxxA/B (Nch Open Drain Output Type) is used in Figure A or Figure B, if impedance of Voltage

Supply pin, V^DDand VDD of this IC is large, detector threshold level would shift by voltage dropdown caused by

the consumption current of the IC itself. Released voltage may also shift and delay time for start-up might be

generated by this usage.

When R3111xxxxC (CMOS Output Type) is used in Figure A or Figure B, Output level could be unstable by

cross conduction current which is generated at detector threshold level or at released voltage level, therefore, do

not use this IC with the connection in Figure A or Figure B.

The connection in Figure C may cause the oscillation in both R3111xxxxC (CMOS Output) and R3111xxxxA/B

(Nch Open Drain Output), therefore do not use R3111x Series with the connection in Figure C.

R3111x

Series

R3111x

Series

R3111x

Series

OUT

GND

Figure A

Figure B

Figure C

1.The products and the product speciﬁcations described in this document are subject to change or

discontinuation of production without notice for reasons such as improvement. Therefore, before

deciding to use the products, please refer to Ricoh sales representatives for the latest

information thereon.

2.The materials in this document may not be copied or otherwise reproduced in whole or in part

without prior written consent of Ricoh.

3.Please be sure to take any necessary formalities under relevant laws or regulations before

exporting or otherwise taking out of your country the products or the technical information

described herein.

4.The technical information described in this document shows typical characteristics of and

example application circuits for the products. The release of such information is not to be

construed as a warranty of or a grant of license under Ricoh's or any third party's intellectual

property rights or any other rights.

5.The products listed in this document are intended and designed for use as general electronic

components in standard applications (oﬃce equipment, telecommunication equipment,

measuring instruments, consumer electronic products, amusement equipment etc.). Those

customers intending to use a product in an application requiring extreme quality and reliability,

for example, in a highly speciﬁc application where the failure or misoperation of the product

could result in human injury or death (aircraft, spacevehicle, nuclear reactor control system,

traﬃc control system, automotive and transportation equipment, combustion equipment, safety

devices, life support system etc.) should ﬁrst contact us.

6.We are making our continuous eﬀort to improve the quality and reliability of our products, but

semiconductor products are likely to fail with certain probability. In order to prevent any injury to

persons or damages to property resulting from such failure, customers should be careful enough

to incorporate safety measures in their design, such as redundancy feature, ﬁrecontainment

feature and fail-safe feature. We do not assume any liability or responsibility for any loss or

damage arising from misuse or inappropriate use of the products.

7.Anti-radiation design is not implemented in the products described in this document.

8.Please contact Ricoh sales representatives should you have any questions or comments

concerning the products or the technical information.

RICOH COMPANY., LTD. Electronic Devices Company

■Ricoh awarded ISO 14001 certification.

■

Ricoh presented with the Japan Management Quality Award for 1999.

The Ricoh Group was awarded ISO 14001 certification, which is an international standard for

environmental management systems, at both its domestic and overseas production facilities.

Our current aim is to obtain ISO 14001 certification for all of our business offices.

Ricoh continually strives to promote customer satisfaction, and shares the achievements

of its management quality improvement program with people and society.

Ricoh completed the organization of the Lead-free production for all of our products.

After Apr. 1, 2006, we will ship out the lead free products only. Thus, all products that

will be shipped from now on comply with RoHS Directive.

http://www.ricoh.com/LSI/

RICOH COMPANY, LTD.

Electronic Devices Company

● Shin-Yokohama oﬃce (International Sales)

3-2-3, Shin-Yokohama, Kohoku-ku, Yokohama City, Kanagawa 222-8530, Japan

Phone: +81-45-477-1697 Fax: +81-45-477-1698

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Electronic Devices Company

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R3111N281B-TR-F [RICOH]

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