1 Features
• Negative Voltage Support: -4 V to -12 V
• Rail-to-Rail Operation
• Bidirectional Signal Path
• 1.8 V Logic Compatible
• Fail-Safe Logic
• High Continuous Current Support: 150 mA
• Low On-Resistance: 1.8 Ω
• -55°C to +125°C Operating Temperature
• Break-Before-Make Switching
• ESD Protection HBM: 2000 V

2 Applications
• Analog and Digital Switching
• GaN Power Amplifer Gate Switching
• Remote Radio Units (RRU)
• Active Antenna System mMIMO (AAS)
• Baseband Unit (BBU)
• Wireless Communications Test

3 Description
The TMUX4157N is a general purpose 2:1, singlepole
double-throw (SPDT), switch that supports a
negative supply rail only. The supply voltage can
range from -4 V to -12 V and the device supports
bidirectional analog and digital signals on the source
(Sx) and drain (D) pins ranging from GND to VSS. The
state of the select pin (SEL) controls which of the two
sources pins are connected to the drain pin.
While TMUX4157N supports negative voltages on the
supply pin and signal path, the logic input pin is
controlled with a positive voltage to allow interfacing
with typical control logic circuitry such as a GPIO
signal. The logic input pin has 1.8 V logic compatible
thresholds and can operate as high as 5.5 for added
system flexibility. Fail-Safe Logic circuitry allows
voltages on the control pins to be applied before
the supply pin, protecting the device from potential
damage.
Fast transition times and high continuous current
through the switch make the TMUX4157N well suited
for applications where the system needs to quickly
switch between two different voltage inputs.