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74LVT16646 Datasheet(PDF) 3 Page - Fairchild Semiconductor

Part No. 74LVT16646
Description  Low Voltage 16-Bit Transceiver/Register with 3-STATE Outputs
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Maker  FAIRCHILD [Fairchild Semiconductor]
Homepage  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

74LVT16646 Datasheet(HTML) 3 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 shown below demon-
strate the four fundamental bus-management functions
that can be performed.
The direction control (DIRn) determines which bus will
receive data when OEn is LOW. In the isolation mode (OEn
HIGH), A data may be stored in one register and/or B data
may be stored in the other register. When an output func-
tion is disabled, the input function is still enabled and may
be used to store and transmit data. Only one of the two
busses, A or B, may be driven at a time.
Real-Time Transfer
Bus B to Bus A
Real-Time Transfer
Bus A to Bus B
Transfer Storage
Data to A or B
Storage
OE DIR CPAB CPBA SAB SBA
LL
X
X
X
L
OE DIR CPAB CPBA SAB SBA
LH
X
X
L
X
OE DIR CPAB CPBA SAB SBA
LL
X
H or L
X
H
LH
H or L
X
H
X
OE DIR CPAB CPBA SAB SBA
LH

XL
X
LL
X

XL
HX

XX
X
HX
X

XX


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