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74LVTH16652MEA Scheda tecnica(PDF) 4 Page - Fairchild Semiconductor

Il numero della parte 74LVTH16652MEA
Spiegazioni elettronici  Low Voltage 16-Bit Transceiver/Register with 3-STATE Outputs
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Produttore elettronici  FAIRCHILD [Fairchild Semiconductor]
Homepage  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

74LVTH16652MEA Scheda tecnica(HTML) 4 Page - Fairchild Semiconductor

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Functional Description
In the transceiver mode, data present at the HIGH imped-
ance port may be stored in either the A or B register or
both.
The select (SABn, SBAn) controls can multiplex stored and
real-time.
The examples below demonstrate the four fundamental
bus-management functions that can be performed with the
LVTH16652.
Data on the A or B data bus, or both can be stored in the
internal D flip-flop by LOW-to-HIGH transitions at the
appropriate Clock Inputs (CPABn, CPBAn) regardless of
the Select or Output Enable Inputs. When SAB and SBA
are in the real time transfer mode, it is also possible to
store data without using the internal D flip-flops by simulta-
neously enabling OEABn and OEBAn. In this configuration
each Output reinforces its Input. Thus when all other data
sources to the two sets of bus lines are in a HIGH imped-
ance state, each set of bus lines will remain at its last state.
Real-Time Transfer
Bus B to Bus A
Storage
Real-Time Transfer
Bus A to Bus B
Transfer Storage
Data to A or B
OEAB1 OEBA1 CPAB1 CPBA1 SAB1 SBA1
LL
X
X
X
L
OEAB1 OEBA1 CPAB1 CPBA1 SAB1 SBA1
XH

XX
X
LX
X

XX
LH

XX
OEAB1 OEBA1 CPAB1 CPBA1 SAB1 SBA1
HH
X
X
L
X
OEAB1 OEBA1 CPAB1 CPBA1 SAB1 SBA1
HL
H or L
H or L
H
H


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