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| An up/down counter containing a register that can be preset with thumbwheel switches. The register is continuously compared with the count and a signal generated when they are equal. The circuit will directly drive four common cathode 7-segment displays. The input frequency is guaranteed up to 2MHz, but will typically operate up to 5MHz. Counting and comparing will run at 750kHz maximum. |
| Specifications (typical at VS = 5V, 25°C): |
| Supply voltage: |
4.5V to 5.5V |
| Supply current: |
300╡A standby |
| Digit driver output: |
35mA peak |
| Segment driver output: |
-12.5mA peak |
| BCD I/O input high: |
>4.4V |
| Count input frequency: |
5MHz |
| Display scan frequency: |
2.5kHz |
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