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Pin compatible with the 74F251, 74FCT251, and 74FCT251T
Zero propagation delay, zero ground bounce
Undershoot clamp diodes on all switch and control inputs
TTL-compatible control inputs
Available in SOIC and QSOP packages
DESCRIPTION:
The QS3251 is a high-speed CMOS TTL-compatible 8:1 multiplexer/
demultiplexer. The QS3251 has 3-state outputs. The QS3251 is a function
and pinout compatible version of the 74F251, 74FCT251 and the 74ALS/
AS/LS251 8:1 multiplexers. The low ON resistance of the QS3251 allows
inputs to be connected to outputs without adding propagation delay and
without generating additional ground bounce noise.
Mux/Demux devices provide an order of magnitude faster speed than
equivalent logic devices.
The QS3251 is characterized for operation at -40擄C to +85擄C.
APPLICATIONS:
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Logic replacement
Video, audio, graphics switching, muxing
Hot-swapping, hot-docking
Voltage translation (5V to 3.3V)
FUNCTIONAL BLOCK DIAGRAM
S
0
S
1
S
2
E
I
0
I
1
I
2
Y
I
3
I
4
I
5
I
6
I
7
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
1
c
2000 Integrated Device Technology, Inc.
FEBRUARY 2000
DSC-5754/1
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