CMOS ZC40110 is a "four-in-one" circuit with decimal addition, decrement reversible counting function, output latch function, 10-line to 7-segment decoding function and display drive function. It can directly drive semiconductor light-emitting diodes and low-voltage fluorescent digital tubes. A single digit requires only one such circuit to be connected to a display device, so the application is very convenient. The ZC40110 pin outer lead arrangement and function are shown in the figure. The functions of the ZC40110 are shown in Table 9-48.
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A Main Distribution Frame (MDF) is a signal distribution frame or cable rack used in telephony to interconnect and manage telecommunication wiring between itself and any number of intermediate distribution frames and cabling from the telephony network it supports.
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