The SN74LS93N is a 4-bit Binary Counter with LS technology and four master-slave flip-flops and additional gating to provide a divide-by-two counter and a 3-stage binary counter for which the count cycle length is divide-by eight for the LS93. To use their maximum count length (decade, divide-by-twelve or four-bit binary) of these counters, the CKB input is connected to the QA output. The input count pulses are applied to CKA input and the outputs are as described in the appropriate function table.
TTL input and CMOS output
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