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參數資料
| 型號： | R3131N22EC-TR-FB |
| 廠商： | RICOH COMPANY LTD |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO3 |
| 封裝： | SOT-23, 3 PIN |
| 文件頁數： | 1/29頁 |
| 文件大小： | 335K |
| 代理商： | R3131N22EC-TR-FB |
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Low Voltage Detector with Built-in
Delay Circuit
R3130N/R3131N SERIES
NO. EA-073-0311
1
OUTLINE
R3130N/R3131N Series are CMOS-based low voltage detector ICs with built-in delay circuit, high Detector
Threshold accuracy and ultra low supply current which can be operated at low voltage.
These ICs can be used as system reset generator, and each of these ICs consists of a voltage reference, a
comparator, resistors for setting voltage detector threshold, an output driver transistor, and an output delay
generator.
Detector threshold is fixed internally with high accuracy and requires no adjustment. When Supply Voltage
crosses a setting detector threshold voltage from a high value to a lower value, this IC generates reset signal.
R3130N Series output “L” at detection mode, while R3131N Series output “H”.
Further, each of R3130N/R3131N Series embeds an output delay generator, when Supply Voltage crosses a
setting detector threshold voltage from a low value to a higher value, during a setting delay time which is fixed in
the IC, this IC keeps the reset condition.
Output Delay Time can be selected. (Typ. 240ms is standard.)
Two output types, Nch open drain type and CMOS type, are available.
Since the package for these ICs is SOT23-3 (Mini-mold) package, high density mounting of the ICs on board
is possible.
FEATURES
Pin to Pin compatible with MAX 809/810 (R3130Nxxxx: MAX 809, R3131Nxxxx: MAX 810)
Ultra-low supply Current ................................................... Typ. 1.25A (R313xN27xx: VDD=3.0V)
Operating Voltage Range .................................................. 1.0V to 6.0V (Topt=25°C)
Detector Threshold ............................................................. Setting with a step of 0.1V in the range of 1.6V to
4.8V is possible.
Embedded Power on Reset Delay Time Circuit ................ Delay Time can be designated.
Refer to Selection Guide.
High Accuracy Detector Threshold ..................................... ±1.5%
High Accuracy Output Delay Time ...................................... ±10.0%
Low Temperature-Drift Coefficient of Detector Threshold .. Typ. ±100ppm/°C
Two Output Types ............................................................... Nch Open Drain and CMOS
Small Package .................................................................... SOT-23-3
APPLICATIONS
CPU & Logic Circuit Reset
Battery Checker
Window Comparator
Wave Shaping Circuit
Battery Back-Up Circuit
Power Failure Detector
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