FEATURES

ANALOG OVERVOLTAGE PROTECTION: 70VPP

NO CHANNEL INTERACTION DURING

OVERVOLTAGE

BREAK-BEFORE-MAKE SWITCHING

ANALOG SIGNAL RANGE: ±15V

STANDBY POWER: 7.5mW typ

TRUE SECOND SOURCE

DESCRIPTION

The MPC508A is an 8-channel single-ended analog

multiplexer and the MPC509A is a 4-channel differential

multiplexer.

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.

These features make the MPC508A and MPC509A ideal for

use in systems where the analog signals originate from

external equipment or separately powered sources.

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.