SN74AVC16646 Datasheet, PDF (3/18 Pages) Texas Instruments – 16-BIT BUS TRANSCEIVER AND REGISTER WITH 3-STATE OUTPUTS

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SN74AVC16646
16-BIT BUS TRANSCEIVER AND REGISTER
WITH 3-STATE OUTPUTS
SCES181F – DECEMBER 1998 – REVISED JUNE 2005
FUNCTION TABLE
(EACH 8-BIT TRANSCEIVER/REGISTER)
INPUTS
DATA I/Os
OE
DIR CLKAB CLKBA SAB SBA
A1-A8
B1-B8
X
X
↑
X
X
X
Input
Unspecified ⁽¹⁾
X
X
X
↑
X
X
Unspecified ⁽¹⁾
Input
H
X
↑
↑
X
X
Input
Input
H
X
H or L
H or L
X
X
Input disabled Input disabled
L
L
X
X
X
L
Output
Input
L
L
X
H or L
X
H
Output
Input
L
H
X
X
L
X
Input
Output
L
H
H or L
X
H
X
Input
Output
OPERATION OR FUNCTION
Store A, B unspecified⁽¹⁾
Store B, A unspecified⁽¹⁾
Store A and B data
Isolation, hold storage
Real-time B data to A bus
Stored B data to A bus
Real-time A data to B bus
Stored A data to B bus
(1) The data-output functions may be enabled or disabled by various signals at OE and DIR. Data-input functions always are enabled; i.e.,
data at the bus terminals is stored on every low-to-high transition of the clock inputs.
3