(2)Schmitt-triggerinputwithinternalpulldown(50kΩtypically),5-Vtolerant (3)Schmitt-triggerinput,5-Vtolerant 31 AVR-2807/AVR-987 LC89057W-VF4A(DI:IC101) EMPHA/UOAUDIO/VOINTCLCEDIXMODE 32333540393841O OU V/ /A ROHDDTKDD TI RSDPNDUCDN ETKGVNVG UMIOM MicrocontrollerN RXOUT1RICAEDDXXXDD ...