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BR93G86-3B Datasheet(PDF) 24 Page - Rohm |
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BR93G86-3B Datasheet(HTML) 24 Page - Rohm |
24 / 39 page 24/36 Datasheet Datasheet BR93G86-3B www.rohm.com TSZ02201-09190G100120-1-2 21.JAN.2013 REV.001 © 2012 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 7)Noise countermeasures ○VCC noise (bypass capacitor) When noise or surge gets in the power source line, malfunction may occur, therefore, for removing these, it is recommended to attach a by pass capacitor (0.1 μF) between IC VCC and GND, At that moment, attach it as close to IC as possible.And, it is also recommended to attach a bypass capacitor between board VCC and GND. ○SK noise When the rise time of SK is long, and a certain degree or more of noise exists, malfunction may occur owing to clock bit displacement. To avoid this, a Schmitt trigger circuit is built in SK input. The hysteresis width of this circuit is set about 0.2V, if noises exist at SK input, set the noise amplitude 0.2Vp-p or below. And it is recommended to set the rise time of SK 100ns or below. In the case when the rise time is 100ns or higher, take sufficient noise countermeasures. Make the clock rise, fall time as small as possible. |
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