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MOTOROLA
4-BIT BIDIRECTIONAL COUNTERS (WITH 3-STATE OUTPUTS)
T h e M C 5 4 /7 4 F 5 6 8 and M C 5 4 /7 4 F 5 6 9 a re fu lly s yn ch ro n o u s, re versib le c o u n te rs w ith 3 -sta te o utp ut