Document
R3112x SERIES
LOW VOLTAGE DETECTOR WITH OUTPUT DELAY
NO. EA-087-070112
OUTLINE
The R3112x 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, resistor net for detector threshold setting, www.DataSheet4U.com an output driver, a hysteresis circuit, and an output delay 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. Three types of packages, SOT-23-5, small SC-82AB, and ultra-small SON1612-6 can be selected so that high density mounting on boards is possible.
FEATURES
• • • • • • • • Built-in Output Delay Circuit............................................... Typ. 100ms with an external capacitor: 0.022µF Supply Current ................................................................... Typ. 0.5µA (R3112x271A/C, VDD=2.6V) Operating Voltage .............................................................. 0.7 to 6.0V(Topt=25°C) Detector Threshold............................................................. 0.9V to 5.0V High Accuracy Detector Threshold .................................... ±2.0% Low Temperature-Drift Coefficient of Detector Threshold ...Typ. ±100ppm/°C Two Output Types .............................................................. Nch Open Drain and CMOS Packages ........................................................................... SOT-23-5(Mini-mold),SC-82AB, SON1612-6
APPLICATIONS
• • • • • • CPU and Logic Circuit Reset Battery Checker Window Comparator Wave Shaping Circuit Battery Back-up Circuit Power Failure Detector
1
R3112x
BLOCK DIAGRAMS
R3112xxx1A
VDD RD OUT VDD RD
R3112xxx1C
+ -
+
OUT
Vref
GND GND
www.DataSheet4U.com
Vref
CD
CD
SELECTION GUIDE
The package type, the detector threshold, the output type, and the taping type of R3112x Series can be designated at the users’ request by specifying the part number as follows;
R3112xxx1x-xx-x
↑ ↑ a b Code a ↑ ↑ ↑ c d e
← Part Number
Contents Designation of Package Type; Q: SC-82AB N: SOT-23-5 D: SON1612-6 Setting Detector Threshold (−VDET); Stepwise setting with a step of 0.1V in the range of 0.9V to 5.0V is possible. Designation of Output Type; A: Nch Open Drain C: CMOS Designation of Packing or Taping Type; Ex. SOT-23-5, SC-82AB, SON1612-6: TR is prescribed as standard directions. (Refer to Taping Specifications) Designation of Composition of pin plating; -F: Lead free plating (SOT-23-5, SC-82AB, SON1612-6)
b c
d e
2
R3112x
PIN CONFIGURATION
SOT-23-5 SC82-AB
4 3
6
SON1612-6
5 4
5
4
(mark side)
www.DataSheet4U.com
(mark side)
1
2
3
1 2
1
2
3
PIN DESCRIPTION
•
SOT-23-5
Pin No. 1 2 3 4 5 Symbol OUT VDD GND NC CD Description Output Pin (Output “L” at detector threshold, Output “H” at released voltage) Volta.