7493: Binary (÷16) Counter (Ripple, Not Presettable)

This is a divide-by-2 and a divide-by-8 counter in a single package. They may be used together as a divide-by-16 or separately. It ripple-counts in the binary-up direction. Note the unusual supply pinouts. Note also the pin connections are not the same as the 7490 or 7492.

For a base-16 counter, weighted 1-2-4-8, enter via Clock 1 and jumper Q1 to Clock 2. Both 0-Set inputs must be grounded for normal counting.

The counter advances on the negative-going clock edge. The clock must be properly conditioned and made bounceless and noise free. Both set terminals must be held at ground for normal counting.

The counter may be reset to zero by bringing either or both 0-Set inputs positive.

An external jumper must be provided between counter halves.

Pinout
Pin # Pin Assignment
1 Clock 2
2 0 Set A
3 0 Set B
4 No Connection
5 Power (+5V)
6 No Connection
7 No Connection
8 Output 4
9 Output 2
10 Ground
11 Output 8
12 Output 1
13 No Connection
14 Clock 1

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