RICOH R3111xxx1A-C Technical data

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’98.Dec.05

LOW VOLTAGE DETECTOR

R3111xxx1A/C Series

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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.

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FEATURES

Ultra-low Supply Current............................................................... TYP. 0.8µA (V

●

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

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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

=1.5V)

DD

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APPLICATIONS

CPU and Logic Circuit Reset

●

Battery Checker

●

Window Comparator

●

Wave Shaping Circuit

●

Battery Back-up Circuit

●

Power Failure Detector

●

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BLOCK DIAGRAMS

R3111XXX1A R3111XXX1C

V

DD

Vref

OUT

GND

V

DD

OUT

Vref

GND

Rev.1.10 - 1 -

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TIMING CHART

Release V oltage +V

Supply V oltage

Output V oltage (OUT)

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DEFINITION OF OUTPUT DELAY TIME

Output Delay Time t

is defined as follows:

PLH

Detector Threshold -V

(VDD)

Minimum Operating Voltage V

DET

Detector Threshold Hysteresis

SS

V

SS

t

PLH

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

pulse from 0.7V to (+V

DD

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

DET

2. In the case of CMOS Output: The time interval between the rising edge of V (V

2) V.

DD

/

+VDET + 2.0V

Input V oltage (V

DD)

pulse from 0.7V to (+V

DD

)+ 2.0V and becoming of the output voltage to

DET

Input V oltage

DD

)

(V

+V

DET

+ 2.0V

Output V oltage

0.7V

GND

5.0V

+V

DET

0.7V

GND

+2.0V

Output V oltage

DET

+2.0V

2.5V

GND

t

PHL

t

PLH

+V

2

GND

t

PHL

Nch Open Drain Output CMOS Output

t

PLH

Rev.1.10 - 2 -

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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×-××

↑↑ ↑ ↑

ab c d

Code Contents

Designation of Package Type;

a

b

c

d

E: TO-92 Q: SC-82AB H: SOT-89 N: SOT-23-5

Setting Detector Threshold (-V

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

←Part Number

DET

);

Rev.1.10 - 3 -

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PIN CONFIGURATION

●

TO-92

●

SOT-89

●

SOT-23-5

●

SC-82AB

43

(mark side)

12

●

SC-2AB

(mark side)

123

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PIN DESCRIPTION

●

TO-92

(mark side)

123

●

SOT-89

54

(mark side)

123

●

SOT-23-5

Pin No. Symbol Pin No. Symbol Pin No. Symbol Pin No. Symbol

1V 2 GND 2 V

DD

1 OUT 1 OUT 1 OUT

DD

2V

DD

2V

3 OUT 3 GND 3 GND 3 NC

4 NC 4 GND 5NC

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ABSOLUTE MAXIMUM RATINGS

Symbol Item Rating Unit

V

DD

V

OUT1

V

OUT2

I

OUT

P

D

P

D

Topt

Tstg

Tsolder

Supply Voltage 12 V Output Voltage (CMOS) VSS-0.3 to VDD+0.3 V Output Voltage (Nch) VSS-0.3 to 12 V Output Current 70 mA Power Dissipation 1* Power Dissipation 2* Operating Temperature Range Storage Temperature Range Lead temperature (Soldering)

Note1 Note2

300 mW 150 mW

-40 to 85

-55 to 125

260°C, 10s

°C °C

*Note 1: applied to SOT-89 and TO-92 *Note 2: applied to SOT-23-5 and SC-82AB

DD

Rev.1.10 - 4 -

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ELECTRICAL CHARACTERISTICS

R3111x091A/C Topt=25°C

●

Symbol Item Conditions MIN. TYP. MAX. Unit

-V V

V V

I

DET

HYS

SS

DDH

DDL

Detector Threshold 0.882 0.900 0.918 V

Detector Threshold Hysteresis 0.027 0.045 0.063 V

Supply Current

V

=0.80V

DD

2.90V

0.8

0.9

2.4

2.7

µA

Maximum Operating Voltage 10 V

Minimum Operating

Voltage*

Note1

Topt=25°C

-40°C≤Topt≤85°C

0.55 0.70

0.65 0.80

V

Nch

=0.05V,VDD=0.70V

V

I

OUT

t

PLH

∆-V

/∆T

DET

R3111x181A/C Topt=25°C

●

Detector Threshold Temperature

Output Current

(Driver Output Pin)

Output Delay Time*

Coefficient

Note2

DS

V

=0.50V,VDD=0.85V

DS

Pch

=-2.1V,VDD=4.5V 1.0 2.0

V

DS

-40°C≤Topt≤85°C ±100 ppm/°C

0.01

0.05

0.50

100

mA

µs

Symbol Item Conditions MIN. TYP. MAX. Unit

-V V

V V

I

DET

HYS

SS

DDH

DDL

Detector Threshold 1.764 1.800 1.836 V

Detector Threshold Hysteresis 0.054 0.090 0.126 V

Supply Current

V

=1.70V

DD

3.80V

0.8

1.0

2.4

3.0

µA

Maximum Operating Voltage 10 V

Minimum Operating

Voltage*

Note1

Topt=25°C

-40°C≤Topt≤85°C

0.55 0.70

0.65 0.80

V

Nch V

∆-V

I

t

OUT

PLH

DET

/∆T

Output Current

(Driver Output Pin)

Output Delay Time*

Note2

Detector Threshold Temperature

Coefficient

=0.05V,VDD=0.70V

DS

V

=0.50V,VDD=0.85V

DS

Pch V

=-2.1V,VDD=4.5V 1.0 2.0

DS

-40°C≤Topt≤85°C ±100 ppm/°C

0.01

1.00

0.05

2.00

100

mA

µs

Rev.1.10 - 5 -

R3111x271A/C Topt=25°C

●

Symbol Item Conditions MIN. TYP. MAX. Unit

-V V

V V

I

DET

HYS

SS

DDH

DDL

Detector Threshold 2.646 2.700 2.754 V

Detector Threshold Hysteresis 0.081 0.135 0.189 V

Supply Current

V

=2.60V

DD

4.70V

0.9

1.1

2.7

3.3

µA

Maximum Operating Voltage 10 V

Minimum Operating

Voltage*

Note1

Topt=25°C

-40°C≤Topt≤85°C

0.55 0.70

0.65 0.80

V

Nch V

=0.05V,VDD=0.70V

I

OUT

t

PLH

∆-V

/∆T

DET

R3111x361A/C Topt=25°C

●

Detector Threshold Temperature

Output Current

(Driver Output Pin)

Output Delay Time*

Coefficient

Note2

DS

V

=0.50V,VDD=1.50V

DS

Pch V

=-2.1V,VDD=4.5V 1.0 2.0

DS

-40°C≤Topt≤85°C ±100 ppm/°C

0.01

1.00

0.05

2.00

100

mA

µs

Symbol Item Conditions MIN. TYP. MAX. Unit

-V V

V V

I

DET

HYS

SS

DDH

DDL

Detector Threshold 3.528 3.600 3.672 V

Detector Threshold Hysteresis 0.108 0.180 0.252 V

Supply Current

V

=3.47V

DD

5.60V

1.0

1.2

3.0

3.6

µA

Maximum Operating Voltage 10 V

Minimum Operating

Voltage*

Note1

Topt=25°C

-40°C≤Topt≤85°C

0.55 0.70

0.65 0.80

V

Nch V

∆-V

I

t

OUT

PLH

DET

/∆T

Output Current

(Driver Output Pin)

Output Delay Time*

Note2

Detector Threshold Temperature

Coefficient

=0.05V,VDD=0.70V

DS

V

=0.50V,VDD=1.50V

DS

Pch V

=-2.1V,VDD=4.5V 1.0 2.0

DS

-40°C≤Topt≤85°C ±100 ppm/°C

0.01

1.00

0.05

2.00

100

mA

µs

Rev.1.10 - 6 -

RICOH R3111xxx1A-C Technical data

Specifications and Main Features

Frequently Asked Questions

User Manual