The ADG439FBRZ is a CMOS Analog Multiplexers comprising eight single channels. The multiplexer provides fault protection. Using a series N-channel, P-channel and N-channel MOSFET structure, both device and signal source protection is provided in the event of an overvoltage or power loss. During fault conditions with power supplies off, the multiplexer input (or output) appears as an open circuit and only a few nanoamperes of leakage current flows. This protects not only the multiplexer and the circuitry driven by the multiplexer, but also protects the sensors or signal sources which drive the multiplexer. The ADG438F switches one of eight inputs to a common output as determined by the 3-bit binary address lines, A0, A1 and A2. An EN input on each device is used to enable or disable the device. When disabled, all channels are switched off.
Feature
All switches off with power supply off
Analog output of on channel clamped within power supplies if an overvoltage occurs
Latch-up proof construction
Fast switching times
250ns maximum tON
150ns maximum tOFF
-40V to +55V Fault and overvoltage protection
Break-before-make construction
TTL- and CMOS-compatible inputs
Applications
Data acquisition systems
Industrial and process control systems
Avionics test equipment
Signal routing between systems
High reliability control systems
Catalogue
FPGA / CPLD
Memory
MOS 
MCU 
DSP
OCEP
Secondary 
Other 
