1 Features
• Radiation hardened
• Single event latch-up (SEL) immune to 43 MeVcm2/
mg at 125°C
• ELDRS free to 30 krad(Si)
• Total ionizing dose (TID) RLAT for every wafer lot
up to 20 krad(Si)
• TID characterized up to 50 krad(Si)
• Space enhanced plastic
• Supply range: 8 V to 22 V or ±5 V to ±16.5 V
• Integrated powered-off and overvoltage protection:
– Overvoltage tolerance up to 85 V from source
to supplies or to drain
– Overvoltage and power-off
protected up to ±60 V
– Cold sparing capable up to ±60 V
– Adjustable fault threshold thresholds (Vfp and
Vfn) from 5 V to supplies
– Interrupt flag feedback indicating faulted
channel
– Non-fault channels continue to operate with low
leakage currents
• Latch-up immune construction
• Precision performance with 100 pA typical leakage
current, 3.5 pF capacitance, and 1% Ron flatness
• Operating temperature from –55°C to +125°C
• Controlled baseline
• Gold wire
• NiPdAu lead finish
• Extended product life cycle
• Extended product-change notification
• Product traceability
• Enhanced mold compound for low outgassing
• Small, industry standard TSSOP-20 packaging

2 Applications
• Low earth orbit (LEO) space applications
• Remote interface unit (RIU)
• Remote telemetry unit (RTU)
• System monitoring for space
• Latch-up and overvoltage detection
• Power-up sequencing protection
• Satellite telemetry and telecommand for onboard
data handling
• Sensor data acquisition

3 Description
The TMUX582F-SEP is a modern 8:1 multiplexer
suitable for both single ended and differential
operation. This latch-up immune device offers robust
overvoltage protection up to ±60 V making it optimal
for harsh space environments. Additionally, this
protection operates in powered-on, powered-off, and
floating supply conditions.
During a fault such as an overvoltage or undervoltage
event, the offending channel turns OFF and the Sx
pin becomes high impedance. If this fault channel is
selected, the drain (D) is pulled to the fault rail that
is exceeded (Vfp or Vfn). All other Sx pins which
are not under fault continue to operate normally.
During normal operation, when the source (Sx) does
not exceed Vfp or Vfn, the switch operates with
low leakage, low capacitance and an ultra-flat onresistance.
This provides high performance signal
integrity with minimal distortion.
The TMUX582F-SEP is a fault protected CMOS
multiplexer flexible enough to handle almost any
application, from system monitoring, to power-up
sequencing protection, to high precision front end
data acquisition.