HCF4056B is a single digit BCD to 7 segment decoder driver circuit that provides a level shifting function on the chip. This feature permits the BCD input-signal swings (V to V ) to be the same DD SS as or different from the 7-segment output signal swings (V to V ). For example, the BCD DD EE input-signal swings (V to V ) may be as low as DD SS 0 to -3V, whereas the output-display drive signal swing (V to V ) may be from 0 to -5V. If V to DD EE DD V exceeds 15V, V to V should be at least EE DD SS 4V. The 7-segment outputs are controlled by the DISPLAY-FREQUENCY (DF) input, which causes the selected segment outputs to be low, high, or a square wave output (for liquid crystal displays). By STMicroelectronics
HCF4056 's PackagesHCF4056 's pdf datasheet

HCF4056 Pinout, Pinouts
HCF4056 pinout,Pin out
This is one package pinout of HCF4056,If you need more pinouts please download HCF4056's pdf datasheet.

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