| |
| Type | 1bit |
|---|---|
| Unlocked by | 3 Bit Decoder |
| Internal ID | Decoder3 |
| Input | Disable | Output | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | ||
 x |
x |
x |
 1 |
 0 |
0 |
0 |
0 |
0 |
0 |
0 |
0
| |
0 |
0 |
0 |
0 |
1 |
0 |
0 |
0 |
0 |
0 |
0 |
0
| |
0 |
0 |
1 |
0 |
0 |
1 |
0 |
0 |
0 |
0 |
0 |
0
| |
0 |
1 |
0 |
0 |
0 |
0 |
1 |
0 |
0 |
0 |
0 |
0
| |
0 |
1 |
1 |
0 |
0 |
0 |
0 |
1 |
0 |
0 |
0 |
0
| |
1 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
1 |
0 |
0 |
0
| |
1 |
0 |
1 |
0 |
0 |
0 |
0 |
0 |
0 |
1 |
0 |
0
| |
1 |
1 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
1 |
0
| |
1 |
1 |
1 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
1
| |
When the Disable pin is converts a 3 bit input into a 1-hot encoding, where exactly one output pin is .
When the Disable pin is , all outputs are . Unlike some tri-state components like the switch the outputs are always either or , never 
.
You can see it as a Binary to Decimal converter; it takes a binary input value from 0 to 7 and activates the corresponding output line.
For example, an input of 000 will turn output 1 , while all other outputs remain . An input of 101 (binary 5) will turn output 6 , since outputs are numbered starting from 1 rather than 0. (for a complete conversion breakdown see the Truth Table)