
74HC690 - (74HC690 - 74HC693) 4 BIT BINARY COUNTER/REGISTER
M54/74HC690/691 M54/74HC692/693
HC690/692 DECADE COUNTER/REGISTER (3-STATE) HC691/693 4 BIT BINARY COUNTER/REGISTER (3-STATE)
HIGH SPEED fMAX = 50 MHz
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