BCD
| Impulsions | Sortie D | Sortie C | Sortie B | Sortie A |
| 0 | 0 | 0 | 0 | 0 |
| 1 | 0 | 0 | 0 | 1 |
| 2 | 0 | 0 | 1 | 0 |
| 3 | 0 | 0 | 1 | 1 |
| 4 | 0 | 1 | 0 | 0 |
| 5 | 0 | 1 | 0 | 1 |
| 6 | 0 | 1 | 1 | 0 |
| 7 | 0 | 1 | 1 | 1 |
| 8 | 1 | 0 | 0 | 0 |
| 9 | 1 | 0 | 0 | 1 |
| 10 | 0 | 0 | 0 | 0 |
| PINS | NAME | CONNECTIONS |
| 1 | LOAD input | LOW |
| 2 | output D | output, bit 3 |
| 3 | load input D | LOW |
| 4 | load input A | LOW |
| 5 | count enable | LOW |
| 6 | output A | output, bit 0 |
| 7 | carry out | N.C. |
| 8 | GROUND | 0 V |
| 9 | RESET input | LOW (HIGH = reset) |
| 10 | UP/DOWN input | HIGH=UP, LOW=DOWN |
| 11 | output B | output, bit 1 |
| 12 | load input B | LOW |
| 13 | load input C | LOW |
| 14 | output C | output, bit 2 |
| 15 | CLOCK input | pulses in from astable |
| 16 | +V | power supply (range 5 - 15 V) |
