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參數資料
| 型號： | R3111Q251A |
| 廠商： | Ricoh Co., Ltd. |
| 英文描述： | LOW VOLTAGE DETECTOR |
| 中文描述： | 低電壓檢測 |
| 文件頁數： | 1/20頁 |
| 文件大小： | 218K |
| 代理商： | R3111Q251A |
’98.Dec.05
LOW VOLTAGE DETECTOR
R3111xxx1A/C Series
Rev.1.10
- 1 -
s 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.
s FEATURES
q
Ultra-low Supply Current ............................................................... TYP. 0.8A (VDD=1.5V)
q
Wide Range of Operating Voltage .................................................. 0.7 to 10.0V(Topt=25
°C)
q
Detector Threshold ......................................................................... Stepwise setting with a step of 0.1V in the range of
0.9V to 6.0V is possible.
q
High Accuracy Detector Threshold................................................ ±2.0%
q
Low Temperature-Drift Coefficient of Detector Threshold............ TYP. ±100ppm/
°C
q
Two Output Types .......................................................................... Nch Open Drain and CMOS
q
Four Types of Packages.................................................................. TO-92, SOT-89(Mini-power Mold), SOT-23-5 (Mini-
mold), SC-82AB
s APPLICATIONS
q
CPU and Logic Circuit Reset
q
Battery Checker
q
Window Comparator
q
Wave Shaping Circuit
q
Battery Back-up Circuit
q
Power Failure Detector
s BLOCK DIAGRAMS
R3111XXX1A
R3111XXX1C
VDD
OUT
GND
Vref
VDD
OUT
GND
Vref
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