1 Features
• Wide supply range: 8 V to 44 V single supply
±5 V to ±22 V dual supply
• Channel protector without need for dedicated
select pin per channel
– Reduces number of control logic signals to
route across PCB
• Integrated fault protection:
– Overvoltage protection, source to supplies or
source to drain: ±85 V
– Overvoltage protection: ±60 V
– Powered-off protection: ±60 V
– Interrupt flags to indicate fault status
– Adjustable overvoltage triggering thresholds
• VFP: 3 V to VDD, VFN: 0 V to VSS
– Adjustable output behavior (clamped or open)
during fault
• Latch-up immunity by device construction
• 6 kV human body model (HBM) ESD rating
• Low On-Resistance: 8.3 Ω typical
• Flat On-Resistance: 5 mΩ typical
• Industry-standard TSSOP and smaller WQFN
package

2 Applications
• Factory automation and control
• Programmable logic controllers (PLC)
• Analog input modules
• Semiconductor test equipment
• Battery test equipment
• Servo drive control module
• Data acquisition systems (DAQ)

3 Description
The TMUX7462F is a four-channel protector that
can be placed on the front end of a signal path
to protect sensitive components downstream from
damage caused by overvoltage faults. Each of the
4 channels has an internal switch that is turned-off
automatically upon occurrence of an overvoltage fault
without the need of external controls. This simplifies
robust system level protection designs by removing
the need for control signals for each channel of
the device. The overvoltage protection is available
in powered and powered-off conditions, making the
TMUX7462F suitable for applications where power
supply sequencing cannot be precisely controlled.
The switch channels remain in the high impedance
state (regardless of switch input conditions) when the
devices power supplies are floating, grounded, or at
a level that is below the undervoltage (UV) threshold.
If the signal level on any Sx pin exceeds the fault
supply (VFP or VFN) by a threshold voltage (VT), then
the Sx pin becomes high impedance and an output
fault flag is asserted low to indicate a fault condition
under normal operation. The drain pin (Dx) is either
pulled to the fault supply voltage that was exceeded
or left floating depending on the DR control logic.
The device operates with dual supplies (±5 V to ±22
V), a single supply (8 V to 44 V), or asymmetric
supplies. The low and flat on-resistance of the device
makes the TMUX7462F an excellent solution for data
acquisition applications where excellent linearity and
low distortion is critical.