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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 0±7 to go low.
All inputs are protected against static discharge damage by
diode clamps to VDD and VSS.


Wide supply voltage range 3.0V to 15V
High noise immunity 0.45 VDD (typ.)
Low power TTL fan out of 2 driving 74L compatibility or 1 driving 74LS
Low power
Glitch free outputs
"Positive logic" on inputs and outputs

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