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    D1990a

    Abstract: PPD4990AC
    Text: DATA SHEET SEC MOS INTEGRATED CIRCUtT ELECTRON DEVICE /¿PD4990A SERIAL I/O CALENDAR & CLOCK C M O S LSI The /xPD4990A is a CM OS LSI developed to input/output calendar & clock data serially to /fro m the micro com­ puter. The crystal frequency ¡5 3 2.768 kH z and the data items included are tim e, minute, second, year, m onth, day,


    OCR Scan     		PDF uPD4990A /xPD4990A 16PIN PD4990A 016-o 1C--1755 1989P D1990a PPD4990AC

    D4990A

    Abstract: D4990 TP4096 what is 74LS07 87AD MCOM-75X
    Text: S E R I A L I/O R E A L T IM E C L O C K 1C /¿P D 4 9 9 0 A U S E R ’S M A N U A L 4 NEC Corporation tëC Corporation 198B 27 9 CHAPTER 1 INTRODUCTION The jiPD4990A is a CMOS LSI developed to input/output calendar and clock data serially to /from the


    OCR Scan     		PDF uPD4990A jiPD4990A pPD4990A D4990A D4990 TP4096 what is 74LS07 87AD MCOM-75X

    D4990AC

    Abstract: D4990A 4990A 4990A IC d4990 uPD4990AG PD4990AC PD4990A
    Text: ¿4­ _ i i —i- . - PRELIM INARY i—. t iSPECIFICATION 11[— _ V E IViOS INTEGRATED C IR C U IT C ECTr.ON DEVICE 4 9 9 0 A C ^ P D 4 9 ^ d A G ^ P D S E R I A L I/O C A L E N D A R & C L O C K CM O S LSI _ The /iP D 4 9 S 0 A C , ¿iP D 4 9 9 0 A G are a CM O S L S I chip developed to input/output calendar c lo ck data seri­


    OCR Scan     		PDF -50-300B D4990AC D4990A 4990A 4990A IC d4990 uPD4990AG PD4990AC PD4990A