R3111Q251A-TR RICOH Co.,Ltd., R3111Q251A-TR Datasheet

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R3111Q251A-TR

Manufacturer Part Number
R3111Q251A-TR
Description
Low voltage detector. Detector threshold (-Vdet) 2.5V. Output type: Nch open drain. Standard taping specification TR
Manufacturer
RICOH Co.,Ltd.
Datasheet

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Rev.1.10
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.
V
OUTLINE
FEATURES
APPLICATIONS
BLOCK DIAGRAMS
DD
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
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-
CPU and Logic Circuit Reset
Battery Checker
Window Comparator
Wave Shaping Circuit
Battery Back-up Circuit
Power Failure Detector
R3111XXX1A
Vref
GND
OUT
- 1 -
LOW VOLTAGE DETECTOR
R3111xxx1A/C Series
V
0.9V to 6.0V is possible.
mold), SC-82AB
DD
DD
=1.5V)
R3111XXX1C
Vref
’98.Dec.05
GND
OUT

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R3111Q251A-TR Summary of contents

Page 1

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 ...

Page 2

TIMING CHART Supply Voltage (V Output Voltage (OUT) DEFINITION OF OUTPUT DELAY TIME Output Delay Time t is defined as follows: PLH 1. In the case of Nch Open Drain Output: Under the condition of the output pin (OUT) is ...

Page 3

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 Code Designation of ...

Page 4

PIN CONFIGURATION TO-92 (mark side PIN DESCRIPTION TO-92 Pin No. Symbol GND 3 OUT ABSOLUTE MAXIMUM RATINGS Symbol OUT1 V OUT2 I OUT Topt Tstg Tsolder ...

Page 5

ELECTRICAL CHARACTERISTICS R3111x091A/C Symbol -V Detector Threshold DET V Detector Threshold Hysteresis HYS I Supply Current SS V Maximum Operating Voltage DDH Minimum Operating V DDL Voltage* Output Current I OUT (Driver Output Pin) t Output Delay Time* PLH Detector ...

Page 6

R3111x271A/C Symbol -V Detector Threshold DET V Detector Threshold Hysteresis HYS I Supply Current SS V Maximum Operating Voltage DDH Minimum Operating V DDL Voltage* Output Current I OUT (Driver Output Pin) t Output Delay Time* PLH Detector Threshold Temperature ...

Page 7

R3111x451A/C Symbol -V Detector Threshold DET V Detector Threshold Hysteresis HYS I Supply Current SS V Maximum Operating Voltage DDH Minimum Operating V DDL Voltage* Output Current I OUT (Driver Output Pin) t Output Delay Time* PLH Detector Threshold Temperature ...

Page 8

ELECTRICAL CHARACTERISRICS BY DETECTOR THRESHOLD R3111x09x to R3111x60x Detector Threshold Part -V [V] DET Number MIN. TYP. MAX. R3111x091x 0.882 0.900 0.918 R3111x101x 0.980 1.000 1.020 R3111x111x 1.078 1.100 1.122 R3111x121x 1.176 1.200 1.224 R3111x131x 1.274 1.300 1.326 R3111x141x 1.372 ...

Page 9

Output Current 1 I [mA] OUT1 Condition MIN. TYP. Nch V =0.05V 0.01 0. =0.7V DD Rev.1.10 Output Delay Output Current 2 I [mA] OUT2 Condition MIN. TYP 0.05 0.5 0.85V 0.2 ...

Page 10

OPERATION Vref Released Voltage(+V ) DET Supply Voltage Detector Threshold(-V ) DET ( Minimum Operating Voltage GND Output Voltage (V ) OUT GND Step 1. Output Voltage is equal to Supply Voltage (V Step 2. At Point “A”, ...

Page 11

TEST CIRCUITS R3111 Series OUT GND Figure 3. Supply Current Test Circuit V DD R3111 Series OUT GND Figure 5. Nch Driver Output Current Test Circuit +V +2.0V DET 0.7V ...

Page 12

TYPICAL CHARACTERISTICS 1) Supply Current vs. Input Voltage R3111x091C 2.5 2.0 1.5 1.0 0.5 0 Input Voltage V R3111x451C 2.0 1.5 1.0 0.5 0 Input Voltage V 2) Detector Threshold Hysteresis vs. Temperature R3111x091C ...

Page 13

R3111x451C 4.8 4.7 +V DET 4.6 4.5 -V DET 4.4 -60 -40 - Temperature Topt Output Voltage vs. Input Voltage R3111x091C 1.6 1.4 1.2 1 0.4 Topt=-40 C 0.2 0.0 ...

Page 14

R3111x451C Topt=- Input Voltage V 4) Nch Driver Output Current vs. V R3111x091C 700 600 V =0.85V DD 500 400 300 200 0.7V 100 ...

Page 15

R3111x451C 2. 0.5 1 1.5 2 2 Nch Driver Output Current vs. Input Voltage R3111x091C 900 800 700 600 500 Topt=-85 C 400 300 25 C 200 ...

Page 16

Pch Driver Output Current vs. Input Voltage R3111x091C 1.4 1.2 V 1.0 0.8 0.6 0.5V 0.4 0.2 0 Input Voltage V R3111x451C 4.5 4.0 3 3.0 2.5 2.0 1.5 1.0 0.5 0 ...

Page 17

R3111x451A 100 10 t PLH 1 0.1 t PHL 0.01 0.001 0.0001 0.001 Load Capacitance C 8) Output Delay Time vs. Input Pin Capacitance R3111x091A 100 10 t PLH 1 0.1 t PHL 0.01 0.001 0.0001 0.001 Input Pin Capacitance ...

Page 18

TYPICAL APPLICATION R3111xxx1A CPU Reset Circuit (Nch Open Drain Output) Case 1.Input Voltage to R3111xxx1A is equal to Input Voltage to CPU V DD 470K R R3111 1A XXX RESET SERIES OUT GND R3111xxx1A CPU Reset Circuit CMOS Output V ...

Page 19

Voltage level Indicator Circuit (lighted when the power runs out) (Nch Open Drain Output R3111 1A XXX SERIES OUT GND Detector Threshold Adjustable Circuit (Nch Open Drain Type Output) V OUT DD R3111 1A XXX SERIES + GND ...

Page 20

R3111 SERIES GND Figure Figure 9, When R3111xxx1C is used, and if an impedance is connected in between Voltage Supplier and the V Pin of R3111xxx1C Series, the operation might be unstable ...

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