CD74FCT646_14 Datasheet, PDF (2/12 Pages) Texas Instruments – BiCMOS OCTAL BUS TRANSCEIVER AND REGISTER WITH 3-STATE OUTPUTS

CD74FCT646
BiCMOS OCTAL BUS TRANSCEIVER AND REGISTER
WITH 3-STATE OUTPUTS
SCBS735A – JULY 2000 – REVISED JULY 2000
21
3
1
23
2
22
OE DIR CLKAB CLKBA SAB SBA
L
L
X
X
X
L
REAL-TIME TRANSFER
BUS B TO BUS A
21
3
1
23
2
22
OE DIR CLKAB CLKBA SAB SBA
L
H
X
X
L
X
REAL-TIME TRANSFER
BUS A TO BUS B
21
3
1
23
2
22
OE DIR CLKAB CLKBA SAB SBA
X
X
↑
X
X
X
X
X
X
↑
X
X
H
X
↑
↑
X
X
STORAGE FROM
A, B, OR A AND B
21
3
1
23
2
22
OE DIR CLKAB CLKBA SAB SBA
L
L
X
H or L X
H
L
H
H or L
X
H
X
TRANSFER STORED DATA
TO A AND/OR B
Figure 1. Bus-Management Functions
2
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265