Ricoh R3111x Series - Manual
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Table of Contents:
- Page 2 – BLOCK DIAGRAMS
- Page 3 – SELECTION GUIDE; Part Number; Code Contents; Setting Detector Threshold (
- Page 5 – ABSOLUTE MAXIMUM RATINGS; Symbol Item Rating
- Page 6 – ELECTRICAL CHARACTERISTICS; input pulse from
- Page 10 – TIMING CHART; DEFINITION OF OUTPUT DELAY TIME; to 5V, the time interval; Nch Open Drain Output
- Page 12 – ELECTRICAL CHARACTERISTICS BY DETECTOR THRESHOLD
- Page 14 – OPERATION; Operation Diagram; Explanation of operation; Rb
- Page 15 – Step
- Page 16 – Step 1. The output voltage is equal to the supply voltage (V
- Page 17 – TEST CIRCUITS; Supply Current Test Circuit; Nch Driver Output Current Test Circuit; Apply to CMOS Output type only
- Page 18 – TYPICAL CHARACTERISTICS; Input Voltage V; ) Detector Threshold Hysteresis vs. Temperature
- Page 21 – Output Current I; ) Nch Driver Output Current vs. Input Voltage; Output Current I; Output Current I; Output Current I
- Page 22 – ) Pch Driver Output Current vs. Input Voltage; Output Dela
- Page 23 – Load Capacitance C; ) Output Delay Time vs. Input Pin Capacitance; Input Pin Capacitance C
- Page 24 – TYPICAL APPLICATION; R3111xxxxA CPU Reset Circuit (Nch Open Drain Output); Case 1. Input Voltage to R3111xxxxA is equal to; R3111xxxxC CPU Reset Circuit (CMOS Output)
- Page 25 – Adjusted Detector Threshold; ) If the value of Ra is set excessively large, voltage; Over-charge Preventing Circuit
- Page 26 – TECHNICAL NOTES; and V; Figure A
- Page 27 – PACKAGE INFORMATION; PACKAGE DIMENSIONS; TAPING SPECIFICATION
- Page 28 – Power
- Page 29 – TAPING REEL DIMENSIONS
- Page 30 – Power Dissipation
- Page 32 – RECOMMENDED LAND PATTERN
- Page 39 – MARK INFORMATION; R3111E SERIES MARK SPECIFICATION; to
- Page 40 – R3111H SERIES MARK SPECIFICATION; Part Number vs. Product Code
- Page 41 – R3111Nxx1 SERIES MARK SPECIFICATION
- Page 42 – R3111Nxx2x SERIES MARK SPECIFICATION
- Page 43 – R3111Q SERIES MARK SPECIFICATION
- Page 44 – R3111D SERIES MARK SPECIFICATION
R3111x SERIES
LOW VOLTAGE DETECTOR
NO.EA-056-080131
1
OUTLINE
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.
Six types of packages, TO-92, SOT-89, SOT-23-3, SOT-23-5, SC-82AB, and SON1612-6 are available.
FEATURES
•
Supply Current ...................................................................... Typ. 0.8
µ
A (
−
V
DET
=
1.5V, V
DD
=−
V
DET
−
0.1V)
•
Range of Operating Voltage Range ...................................... 0.7V to 10.0V (T
opt
=
25
°
C)
•
Detector Threshold Range .................................................... 0.9V to 6.0V
•
Accuracy Detector Threshold................................................
±
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,
SON1612-6
APPLICATIONS
•
CPU and Logic Circuit Reset
•
Battery Checker
•
Window Comparator
•
Wave Shaping Circuit
•
Battery Back-up Circuit
•
Power Failure Detector
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Summary
R3111x 2 BLOCK DIAGRAMS R3111xxxxA R3111xxxxB OUT V DD Vref GND OUT V DD Vref GND R3111xxxxC OUT V DD GND Vref
R3111x 3 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 e f Code Contents a D...
R3111x 5 ABSOLUTE MAXIMUM RATINGS Symbol Item Rating Unit V DD Supply Voltage 12 V V OUT1 Output Voltage (CMOS) V SS − 0.3 to V DD + 0.3 V V OUT2 Output Voltage (Nch) V SS − 0.3 to 12 V I OUT Output Current 70 mA Power Dissipation (TO-92)* 300 Power Dissipation (SOT-89)* 900 Power Dissipation (SOT-2...
