Cascading the 4520 (CB083E)

For counting to values higher than 16, many 4520 can be cascaded as shown in Figure . The EN output that goes to the high logic level when the count reaches 15 is used in this case. Two 4520s can be cascaded to count up to 258 [’l B x 16]. The maximum input frequency is the same as when the device is used alone.

 

Cascading the 4520
Cascading the 4520

 

 

Datasheet of 4520

 


Circuit Bench

  • JFET Preamplfier (MSB046E)

    The preamplifier using JFET presets a high input impedance and very low distortion. The input...

  • Linear VCO (CB1527E )

        We found this circuit in a publication for radio amateurs of 1976. The operational amplifier is a...