74F779SC PDF 데이터시트 검색

74F779 8-Bit Bidirectional Binary Counter with 3-STATE Outputs April 1988 Revised March 2000 74F779 8-Bit Bidirectional Binary Counter with 3-STATE Outputs General Description The 74F779 is a fully synchronous 8-stage up, down counter with multiplexed 3-STATE I, O ports for bus-oriented applications. All control functions (hold, count up, count down, synchronous load) are controlled by two mode pins (S0, S1). The device also features carry lookahead for easy cascading. All state changes are in