The CD4028BC is a BCD-to-decimal or binary-to-octaldecoder consisting of 4 inputs, decoding logic gates, and10 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 decimaldecoded outputs. Similarly, a 3-bit binary code appliedto inputs A, B, and C is decoded in octal at outputs 0–7. Ahigh level signal at the D input inhibits octal decoding andcauses outputs 0–7 to go LOW.All inputs are protected against static discharge damage bydiode clamps to VDD and VSS.
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