1 Features
1• No Overshoot When Switching Inputs
• Rail-to-rail Operation
• Bidirectional Signal Path
• 1.8 V Logic Compatible
• Fail-safe Logic
• Low On-resistance: 3 Ω
• Wide Supply Range: 1.08 V to 5.5 V
• -40°C to +125°C Operating Temperature
• Low Supply Current: 7 nA
• Break-before-make Switching
• ESD Protection HBM: 2000 V

2 Applications
• Analog and Digital Switching
• I2C and SPI Bus Multiplexing
• Remote Radio Units (RRU)
• Active Antenna System mMIMO (AAS)
• Rack Server
• Network Interface Card (NIC)
• Barcode Scanner
• Building Automation
• Analog Input Module
• Motor Drives
• Video Surveillance
• Electronic Point of Sale
• Desktop PC
• Appliances

3 Description
The TMUX1237 is a general purpose 2:1, single-pole
double-throw (SPDT), switch that supports a wide
operating range of 1.08 V to 5.5 V. The device
supports bidirectional analog and digital signals on
the source (Sx) and drain (D) pins ranging from GND
to VDD. The state of the select pin (SEL) controls
which of the two sources pins are connected to the
drain pin. Additionally, the TMUX1237 has a low
supply current of 7 nA which enables the device to be
used in a host of handheld or low power applications.
The TMUX1237 improves system reliability by
eliminating overshoot that might occur in a system
due to switching between two voltage levels on the
source (Sx) pins. In addition, the TMUX1237 also
maintains fast switching times, enabling it to improve
system performance for a wide range of applications
from communications equipment to building
automation.
All logic inputs have 1.8 V logic compatible
thresholds, ensuring both TTL and CMOS logic
compatibility when operating in the valid supply
voltage range. Fail-Safe Logic circuitry allows
voltages on the control pins to be applied before the
supply pin, protecting the device from potential
damage.