a
FEATURES
DTL/TTL/CMOS Direct Interface
Power Dissipation: 30 W
R
ON
: 170
Standard 16-Lead DlPs and 20-Terminal Surface
Mount Packages
CMOS
4-/8-Channel Analog Multiplexers
AD7501/AD7502/AD7503
FUNCTIONAL BLOCK DIAGRAM
AD7501/AD7503
GENERAL DESCRIPTION
The AD7501 and AD7503 are monolithic CMOS, 8-channel
analog multiplexers which switch one of eight inputs to a
common output, depending on the state of three binary address
lines and an “enable” input. The AD7503 is identical to the
AD7501 except its “enable” logic is inverted. All digital inputs
are TTL/DTL and CMOS logic compatible.
The AD7502 is a monolithic CMOS dual 4-channel analog
multiplexer. Depending on the state of two binary address
inputs and an “enable,” it switches two output buses to two
of eight inputs.
Truth Tables
AD7501
AD7502
A
2
0
0
0
0
1
1
1
1
X
A
1
0
0
1
1
0
0
1
1
X
A
0
0
1
0
1
0
1
0
1
X
AD7503
EN
1
1
1
1
1
1
1
1
0
“ON”
1
2
3
4
5
6
7
8
None
AD7502
A
2
0
0
0
0
1
1
1
1
X
A
1
0
0
1
1
0
0
1
1
X
A
0
0
1
0
1
0
1
0
1
X
EN
0
0
0
0
0
0
0
0
1
“ON”
1
2
3
4
5
6
7
8
None
A
l
0
0
1
1
X
A
0
0
1
0
1
X
EN
1
1
1
1
0
“ON”
1&5
2&6
3&7
4&8
None
REV. B
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