The CD4028BM CD4028BC is a BCD-to-decimal or binaryto-octal decoder consisting of 4 inputs decoding logic gates and 10 output buffers A BCD code applied to the 4 inputs A B C and D results in a high level at the selected 1-of-10 decimal decoded outputs Similarly a 3-bit binary code applied to inputs A B and C is decoded in octal at outputs 0 7 A high level signal at the D input inhibits octal decoding and causes outputs 07 to go low All inputs are protected against static discharge damage by diode clamps to VDD and VSS