鈥?/div>
The QS33X257 is a high-speed CMOS TTL-compatible 24:12 multi-
plexer/demultiplexer. The QS33X257 is functionally compatible to three of
the QuickSwitch version of the 74F257, 74FCT257, and the 74ALS/AS/
LS257 Quad 2:1 multiplexers. The low ON resistance of the QS33X257
allows inputs to be connected to outputs without adding propagation delay
and without generating additional ground bounce noise. This part will be
used in wide bus multiplexing where board space is at a premium.
Mux/Demux devices provide an order of magnitude faster speed than
equivalent logic devices.
The QS33X257 is characterized for operation at -40擄C to +85擄C.
Logic replacement
Video, audio, graphics switching, muxing
Hot-swapping, hot-docking
Voltage translation (5V to 3.3V)
Bus funneling
FUNCTIONAL BLOCK DIAGRAM
S
0
S
2
E
0
I0
A
Y
A
I1
A
I0
B
Y
B
I1
B
I0
C
Y
C
I1
C
I0
D
Y
D
I1
D
E
2
I0
I
Y
I
I1
I
I0
J
Y
J
I1
J
I0
K
Y
K
I1
K
I0
L
Y
L
I1
L
S
1
E
1
I0
E
Y
E
I1
E
I0
F
Y
F
I1
F
I0
G
Y
G
I1
G
I0
H
Y
H
I1
H
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
1
c
2000 Integrated Device Technology, Inc.
MARCH 2000
DSC-5763/1