HCF4056B is a 7-segment decoder driver for liquid crystal displays (LCDs). The device is fabricated using CMOS process and features ultra low power and high reliability. HCF4056B provides 1 input pin and 7 output pins.
The HCF4056B is a monolithic integrated circuit fabricated in Metal Oxide Semiconductor technology, available in DIP and SOP packages. It functions as 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 to be the same as or different from the 7-segment output signal swings. 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. The device provides a strobed-latch function at the BCD inputs and decodes all input combinations including 0-9, L, H, P, A, and blank positions.
| Supply Voltage | 3 to 20 V |
|---|---|
| Operating Temperature | -55 to +125 °C |
| Input Leakage Current | 100nA (MAX) |
| Package Types | DIP and SOP |
The device provides full decoding of all input combinations including 0-9, L, H, P, A, and blank positions.
No, the HCF4056B provides an equivalent AC output drive for liquid crystal displays without requiring an external capacitor.
The absolute maximum supply voltage is +22 V, though recommended operation is up to 20 V.