Low Voltage Detector with Built-in Delay Circuit
| R3130N/R3131N Series are low voltage detector ICs with built-in delay circuit, high
Detector Threshold accuracy and ultra low supply current by CMOS process, 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 are SOT-23-3 (Mini-mold)
package, high density mounting of the ICs on board is possible. |
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| Pin to Pin compatible with MAX809/810 (R3130Nxxxx: MAX809, R3131Nxxxx: MAX810) |
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 Ultra-low
supply Current |
TYP. 1.25µA (R313xN27xx: VDD=3.0V) |
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| Operating
Voltage Range |
1.0V to 6.0V (Topt=25°C) |
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| Detector
Threshold |
Setting with a step of 0.1V in the range of 1.6V to 4.8V is possible. |
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| Embedded
Power on Reset Delay Time Circuit |
Delay Time can be designated. Refer to Selection Guide. |
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| High
Accuracy Detector Threshold |
±1.5% |
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| High
Accuracy Output Delay Time |
±10.0% |
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| Low
Temperature-Drift Coefficient of Detector Threshold |
TYP. ±100ppm/°C |
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| Two
Output Types |
Nch Open Drain and CMOS |
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| Small
Package |
SOT-23-3 |
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CPU & Logic Circuit Reset
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Battery Checker
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Window Comparator
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Wave Shaping Circuit
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Battery Back-up Circuit
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Power Failure Detector
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| * All PDF files are less than 1MB unless otherwise stated. |
| * If you don't have Adobe Reader, you can download free. |
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Technical Info.
Technical Information on Ricoh Power Management ICs.
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Product Catalog
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| Selection guide is available for download in PDF format. |
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R3130N / R3131N Series
