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74574: octal D-type flip-flop, tri-state output

  • Type: flip-flop
  • DIP: 20-pin
  • Number of elements: 8
  • Trigger: positive edge
  • Tri-state output

Description

Provides eight positive-edge triggered D-type flip-flops with tri-state output. This chip has a different pin layout than 74374

Inputs and outputs

Label Description Signal
Dn Input n active high
Qn Output n active high
CLK Clock positive edge
OE Output enable active low

Function table

OE CLK Dn Qn
L / H H
L / L L
L L X qn0
H X X Z
  • H: HIGH voltage level
  • L: LOW voltage level
  • X: don't care
  • Z: high-impedance OFF-state
  • /: positive edge
  • qn0: previous state of Qn

Pin layout

TODO

Pin Pin
OE 1 20 VCC
D1 2 19 Q1
D2 3 18 Q2
D3 4 17 Q3
D4 5 16 Q4
D5 6 15 Q5
D6 7 14 Q6
D7 8 13 Q7
D8 9 12 Q8
GND 10 11 CLK

Datasheets