1 Features

? Latch-up immune

? Dual supply range: ±4.5 V to ±22 V

? Single supply range: 4.5 V to 44 V

? Low On-Resistance: 1.2 Ω

? Low charge injection: ?10 pC

? –40°C to +125°C operating temperature

? Integrated Pull-Down resistor on logic pins

? 1.8 V logic compatible

? Fail-safe logic

? Rail to rail operation

? Bidirectional signal path

? Break-before-make switching

2 Applications

? Optical networking

? Optical test equipment

? Wired networking

? Factory automation and industrial controls

? Programmable logic controllers (PLC)

? Semiconductor test

? Ultrasound scanners

? Patient monitoring and diagnostics

? Remote radio units

? Data acquisition systems

3 Description

The TMUX720x is a complementary metal-oxide

semiconductor (CMOS) switch with Latch-Up

immunity in a single channel, 1:1 (SPST)

configuration. The device works with a single supply

(4.5 V to 44 V), dual supplies (±4.5 V to ±22 V), or

asymmetric supplies (such as VDD = 12 V, VSS = –5

V). The TMUX720x supports bidirectional analog and

digital signals on the source (S) and drain (D) pin

ranging from VSS to VDD.

The TMUX720x can be enabled or disabled by

controlling the SEL pin. When disabled, both signal

path switches are off. All logic control inputs support

logic levels from 1.8 V to VDD, which is compatible for

both TTL and CMOS logic 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.

The TMUX72xx family provides Latch-Up immunity,

preventing undesirable high current events between

parasitic structures within the device typically caused

by overvoltage events. A Latch-Up condition typically

continues until the power supply rails are turned off

and can lead to device failure. The Latch-Up immunity

feature allows the TMUX72xx family of switches and

multiplexers to be used in harsh environments.