decade and binary counters.
Y Y
Typical power dissipation 45 mW Count frequency 42 MHz
Connection Diagrams (Dual-In-Line Packages)
TL F 6381
– 1
Order Number DM74LS90M or DM74LS9.
To use their maximum count length (decade or four bit binary) the B input is connected to the QA output The input count .
Each of these monolithic counters contains four masterslave flip-flops and additional gating to provide a divide-bytwo counter and a three-stage binary counter for which the count cycle length is divide-by-five for the ’LS90 and divideby-eight for th.
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