109.185.170.117: added an abstract easy to understand explanation

2026-02-06T20:43:09Z

added an abstract easy to understand explanation

← Older revision		Revision as of 20:43, 6 February 2026
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	When the Disable pin is {{On}}, all outputs are {{Off}}. Unlike some tri-state components like the {{Component\|Switch\|switch}} the outputs are always either {{Off}} or {{On}}, never {{Z}}.		When the Disable pin is {{On}}, all outputs are {{Off}}. Unlike some tri-state components like the {{Component\|Switch\|switch}} the outputs are always either {{Off}} or {{On}}, never {{Z}}.

			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 {{On}}, while all other outputs remain {{Off}}. An input of 101 (binary 5) will turn output 6 {{On}}, since outputs are numbered starting from 1 rather than 0. (for a complete conversion breakdown see the Truth Table)

Gelthor: Initial stub

2024-08-31T12:40:25Z

Initial stub

New page

{{Infobox component
| internal-enum = Decoder3
| type = 1bit
| prerequisite = 3 Bit Decoder
}}

{{stub}}

{| {{Truthtable}}
|+ {{SUBPAGENAME}} Truth Table
|-
! colspan="3"|Input !! Disable !! !! colspan="8"| Output
|-
! 1 !! 2 !! 3 !! !! !! 1 !! 2 !! 3 !! 4 !! 5 !! 6 || 7 !! 8
|-
| {{Any t}} || {{Any t}}|| | {{Any t}}|| {{On t}}|| || {{Off t}}|| {{Off t}}|| {{Off t}}|| {{Off t}}|| {{Off t}}|| {{Off t}}|| {{Off t}}|| {{Off t}}
|-
| {{Off t}}|| {{Off t}}|| | {{Off t}}|| {{Off t}}|| || {{On t}}|| {{Off t}}|| {{Off t}}|| {{Off t}}|| {{Off t}}|| {{Off t}}|| {{Off t}}|| {{Off t}}
|-
| {{Off t}}|| {{Off t}}|| | {{On t}}|| {{Off t}}|| || {{Off t}}|| {{On t}}|| {{Off t}}|| {{Off t}}|| {{Off t}}|| {{Off t}}|| {{Off t}}|| {{Off t}}
|-
| {{Off t}}|| {{On t}}|| | {{Off t}}|| {{Off t}}|| || {{Off t}}|| {{Off t}}|| {{On t}}|| {{Off t}}|| {{Off t}}|| {{Off t}}|| {{Off t}}|| {{Off t}}
|-
| {{Off t}}|| {{On t}}|| | {{On t}}|| {{Off t}}|| || {{Off t}}|| {{Off t}}|| {{Off t}}|| {{On t}}|| {{Off t}}|| {{Off t}}|| {{Off t}}|| {{Off t}}
|-
| {{On t}}|| {{Off t}}|| | {{Off t}}|| {{Off t}}|| || {{Off t}}|| {{Off t}}|| {{Off t}}|| {{Off t}}|| {{On t}}|| {{Off t}}|| {{Off t}}|| {{Off t}}
|-
| {{On t}}|| {{Off t}}|| | {{On t}}|| {{Off t}}|| || {{Off t}}|| {{Off t}}|| {{Off t}}|| {{Off t}}|| {{Off t}}|| {{On t}}|| {{Off t}}|| {{Off t}}
|-
| {{On t}}|| {{On t}}|| | {{Off t}}|| {{Off t}}|| || {{Off t}}|| {{Off t}}|| {{Off t}}|| {{Off t}}|| {{Off t}}|| {{Off t}}|| {{On t}}|| {{Off t}}
|-
| {{On t}}|| {{On t}}|| | {{On t}}|| {{Off t}}|| || {{Off t}}|| {{Off t}}|| {{Off t}}|| {{Off t}}|| {{Off t}}|| {{Off t}}|| {{Off t}}|| {{On t}}
|}

When the Disable pin is {{Off}} converts a 3 bit input into a 1-hot encoding, where exactly one output pin is {{On}}.

When the Disable pin is {{On}}, all outputs are {{Off}}. Unlike some tri-state components like the {{Component|Switch|switch}} the outputs are always either {{Off}} or {{On}}, never {{Z}}.

Component/3 Bit decoder - Revision history

109.185.170.117: added an abstract easy to understand explanation

Gelthor: Initial stub