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WF5041A4B-4 Datasheet(PDF) 10 Page - Nippon Precision Circuits Inc |
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WF5041A4B-4 Datasheet(HTML) 10 Page - Nippon Precision Circuits Inc |
10 / 11 page 5041 series SEIKO NPC CORPORATION—10 Power-saving Pull-up Resistor The INHN pin pull-up resistance RPU1 or RPU2 changes in response to the input level (open, HIGH, or LOW). When INHN is tied LOW level, the pull-up resistance is large (RPU1), reducing the current consumed by the resistance. When INHN is left open circuit (HIGH), the pull-up resistance is small (RPU2), which increases the input susceptibility to external noise. However, the pull-up resistance ties the INHN pin HIGH level to prevent external noise from unexpectedly stopping the output. Oscillation Detector Function The 5041 series also feature an oscillation detector circuit. This circuit functions to disable the outputs until the oscillator circuit starts and oscillation becomes stable. This alleviates the danger of abnormal oscillator output at oscillator start-up when power is applied or when INHN is switched. |
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