74ACT399 ,Quad 2-Port Register
74ACT399 ,Quad 2-Port Register74AC399 54ACT/74ACT399Quad2-PortRegister#October199374AC399 54ACT/74ACT399#Quad2-PortRegisterGenera ..
74ACT399 ,Quad 2-Port Register
74ACT399PC ,Quad 2-Port RegisterFunctional Description Function TableThe AC/ACT399 is a high-speed quad 2-port register. ItInputs O ..
74ACT399SC ,Quad 2-Port RegisterFeaturesThe AC/ACT399 is the logical equivalent of a quad 2-input
74ACT399
Quad 2-Port Register
TL/F/9789
74AC399
54ACT/74ACT399
Quad
2-Port
Register
October 1993
74AC399#54ACT/74ACT399
Quad 2-Port Register
General Description
The ’AC/ACT399isthe logical equivalentofa quad 2-input
multiplexer feeding into four edge-triggered flip-flops.A
common Select input determines whichofthe two 4-bit
wordsis accepted.The selected data entersthe flip-flopon
the rising edgeofthe clock.
Features ICC reducedby 50% Select inputs fromtwo data sources Fully positive edge-triggered operation Outputs source/sink24mA ’ACT/ACT399has TTL-compatible inputs
Logic Symbols Connection Diagrams
TL/F/9789–1
IEEE/IEC
TL/F/9789–5
PinAssignment
for DIP, Flatpakand SOIC
TL/F/9789–3
PinAssignment
for LCC
TL/F/9789–2
PinNames Description CommonSelect Input Clock Pulse Input
I0a–I0d Data Inputs from Source0
I1a–I1d Data Inputs from Source1
Qa–Qd Register True Outputs
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