ogy. The multiplexers are available in plastic DIP and
plastic SOIC packages. Temperature range is 鈥?0擄C to
+85擄C.
FUNCTIONAL DIAGRAMS
DESCRIPTION
The MPC508A is an 8-channel single-ended analog
multiplexer and the MPC509A is a 4-channel differen-
tial multiplexer.
The MPC508A and MPC509A multiplexers have in-
put overvoltage protection. Analog input voltages may
exceed either power supply voltage without damaging
the device or disturbing the signal path of other chan-
nels. The protection circuitry assures that signal fidel-
ity is maintained even under fault conditions that
would destroy other multiplexers. Analog inputs can
withstand 70Vp-p signal levels and standard ESD
tests. Signal sources are protected from short circuits
should multiplexer power loss occur; each input pre-
sents a 1k鈩?resistance under this condition. Digital
inputs can also sustain continuous faults up to 4V
greater than either supply voltage.
These features make the MPC508A and MPC509A
ideal for use in systems where the analog signals
originate from external equipment or separately pow-
ered sources.
Decoder/
Driver
Overvoltage
Clamp and
Signal
Isolation
NOTE: (1) Digital
Input Protection.
MPC508A
5V
Ref
Level
Shift
(1) (1)
(1)
(1)
A
0
A
1
A
2
EN
1k鈩?/div>
In 1A
1k鈩?/div>
In 4A
1k鈩?/div>
In 1B
1k鈩?/div>
In 4B
Overvoltage
Clamp and
Signal
Isolation
NOTE: (1) Digital
Input Protection.
MPC509A
Out B
Decoder/
Driver
Out A
5V
Ref
Level
Shift
(1) (1)
(1)
A
0
A
1
EN
International Airport Industrial Park 鈥?Mailing Address: PO Box 11400, Tucson, AZ 85734 鈥?Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 鈥?Tel: (520) 746-1111 鈥?Twx: 910-952-1111
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