| Pin | Name | Description |
|---|---|---|
| 1 | RIN | Referency Frequency Input |
| 2 | RO | Referency Frequency Output (Buffered) |
| 3 | VCC | Positive Supply Voltage |
| 4 | PDO | Phase Detector Output |
| 5 | GND | Ground |
| 6 | fIN | Frequency Input |
| 7 | E | Enable |
| 8 | D | Data |
| 9 | CL | Clock |
This counter shows the number of hits since the 29th January 2000
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