MIC50398

MIC50398/50399 Micrel MIC50398/MIC50399 Six Decade Counter / Display Decoder Not Recommended for New Designs General Description The MIC50398/9 is an ion-implanted, P-channel MOS six-decade synchronous up/down-counter/display driver with storage latches. The counter can be loaded digit-by-digit with BCD data. The counter has an asynchronous-clear function. Scanning is controlled by the scan oscillator input which is self-oscillating or can be driven by an external signal. The contents of the counter can be transferred into the 6-digit latch which is then multiplexed from MSD to LSD in BCD or 7-segment format to the output. These devices are intended to interface directly with the standard CMOS logic families. Features Single power supply Schmitt-Trigger on the count-input Six decades of synchronous up/down counting Look-ahead carry or borrow Loadable counter Multiplexed seven-segment outputs MIC50398N Multiplexed BCD outputs, MIC50399N Internal scan oscillator Pin Connection V SS SET a b c SEGMENTS d e f g 1 2 3 4 5 6 7 8 9 MIC50398CN 28 27 26 25 24 UP/DOWN CARRY COUNT INHIBIT COUNT INPUT LOAD COUNTER BCD OUTPUT DIGIT STROBES V SS SET NC NC A B C D STORE 1 2 3 4 5 6 7 8 9 MIC50399CN 28 27 26 25 24 23 UP/DOWN ZERO CARRY COUNT INHIBIT COUNT INPUT LOAD COUNTER 23 D 6 22 D 5 21 D 4 20 D 3 19 D 2 18 D 1 17 16 15 V DD SCAN CLEAR 22 D 6 21 D 5 20 D 4 19 D 3 18 D 2 17 D 1 16 15 V DD SCAN DIGIT STROBES STORE 10 C D 11 COUNTER BCD INPUTS C C 12 C B 13 C ...