MPC508A
MPC509A
M
P
C508
M
PC509
SBFS019A – JANUARY 1988 — REVISED OCTOBER 2003
Single-Ended 8-Channel/Differential 4-Channel
CMOS ANALOG MULTIPLEXERS
FEATURES
● ANALOG OVERVOLTAGE PROTECTION: 70VPP
FUNCTIONAL DIAGRAMS
● NO CHANNEL INTERACTION DURING
1kΩ
1kΩ
1kΩ
OVERVOLTAGE
In 1
Out
● BREAK-BEFORE-MAKE SWITCHING
● ANALOG SIGNAL RANGE: ±15V
● STANDBY POWER: 7.5mW typ
● TRUE SECOND SOURCE
In 2
In 8
Decoder/
Driver
Overvoltage
Clamp and
Signal
5V
Ref
Level
Shift
DESCRIPTION
Isolation
The MPC508A is an 8-channel single-ended analog
multiplexer and the MPC509A is a 4-channel differential
multiplexer.
(1)
(1)
(1) (1)
NOTE: (1) Digital
Input Protection.
MPC508A
A0 A1 A2
EN
The MPC508A and MPC509A multiplexers have input
overvoltage protection. Analog input voltages may exceed
either power supply voltage without damaging the device or
disturbing the signal path of other channels. The protection
circuitry assures that signal fidelity is maintained even under
fault conditions that would destroy other multiplexers. Analog
inputs can withstand 70VPP signal levels and standard ESD
tests. Signal sources are protected from short circuits should
multiplexer power loss occur; each input presents a 1kΩ
resistance under this condition. Digital inputs can also sustain
continuous faults up to 4V greater than either supply voltage.
1kΩ
1kΩ
In 1A
In 4A
Out A
Out B
1kΩ
1kΩ
In 1B
In 4B
Decoder/
Driver
These features make the MPC508A and MPC509A ideal for
use in systems where the analog signals originate from
external equipment or separately powered sources.
Overvoltage
Clamp and
Signal
5V
Ref
Level
Shift
Isolation
The MPC508A and MPC509A are fabricated with Burr-
Brown’s dielectrically isolated CMOS technology. The
multiplexers are available in plastic DIP and plastic SOIC
packages. Temperature range is –40°C to +85°C.
(1) (1)
(1)
NOTE: (1) Digital
Input Protection.
MPC509A
A0 A1
EN
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