The TC74HC4028A is a high speed CMOS BCD-to-DECIMAL DECODER fabricated with silicon gate C2MOS technology. It achieves the high speed operation similar to equivalent LSTTL while maintaining the CMOS low power dissipation. A BCD code applied to the four inputs (A-D) sets a high level at one of ten decoded outputs. A illegal BCD code such as eleven thru fifteen sets all outputs low. This device can be used as 3-to-8 LINE DECODER when input D is held high. This device is useful for code conversion, address decoding, memory selection, multiplexing, or readout decoding. All inputs are equipped with protection circuits against static discharge or transient excess voltage.