A pulse to logic low is sequentially switched around the three keyboard scan outputs and requires 5 ms for a complete scan cycle. When a key is depressed, the ...
Part Number, UM9151-3. Manufacturer, United Microelectronics. Title, Pulse Dialer. Description ... Features ... Published, Jun 18, 2005. Datasheet, PDF File ...
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Part No. UM9151-3 ; Description, Pulse Dialer ; File Size, 217.59K / 5 Page ; Maker, United Microelectronics. JITONG TECHNOLOGY (CHINA HK & SZ) Datasheet.hk's ...