74174: Difference between revisions

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==74174==
Hex D flip-flop
Used as page register for [[memory paging]] in [[ZX Spectrum 128K]]
====Pinout====
====Pinout====
<div style="font-family:'Lucida  
<div style="font-family:'Lucida  
Line 9: Line 4:
{|
{|
| style="text-align:right;" |
| style="text-align:right;" |
{{overline|CLEAR}}<br>
{{overline|CLEAR}} [<br>
1Q<br>
1Q [<br>
1D<br>
1D [<br>
2D<br>
2D [<br>
2Q<br>
2Q [<br>
3D<br>
3D [<br>
3Q<br>
3Q [<br>
GND
GND [
| style="border: 1px solid black" |
| style="border: 1px solid black"|
1&nbsp;°&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;16<br>
1&nbsp;°&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;16<br>
2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;15<br>
2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;15<br>
Line 27: Line 22:
8&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;9
8&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;9
||
||
V<sub>CC</sub><br>
] V<sub>CC</sub><br>
6Q<br>
] 6Q<br>
6D<br>
] 6D<br>
5D<br>
] 5D<br>
5Q<br>
] 5Q<br>
4D<br>
] 4D<br>
4Q<br>
] 4Q<br>
CLK
] CLK
|}
|}
</div>
</div>
====Function table<br>(each flip-flop)====
<div style="font-family:'Lucida
Console', monospace;">
{|class="wikitable"|
!colspan=3|Inputs!!Output
|-
!CLEAR||CLK||xD||xQ
|-
|L||X||X||L
|-
|H||&uarr;||H||H
|-
|H||&uarr;||L||L
|-
|H||L||X||xQ<sub>O</sub>
|}
</div>
H = high level (1) steady state<br>
L = low level (0) steady state<br>
X = irrelevant<br>
&uarr; = transition from L to H<br>
xQ<sub>O</sub> = the level of xQ before the indicated steady-state input conditions were established
[[Category:Hardware]]
[[Category:Integrated Circuit]]

Revision as of 15:34, 5 May 2021

Pinout

CLEAR [
1Q [
1D [
2D [
2Q [
3D [
3Q [
GND [

1 °       16
2         15
3         14
4         13
5         12
6         11
7         10
8         9

] VCC
] 6Q
] 6D
] 5D
] 5Q
] 4D
] 4Q
] CLK