44-V, latch-up immune, 2:1 (SPDT) precision switch with 1.8-V logic

The TMUX7219 is a complementary metal-oxide semiconductor (CMOS) switch

with latch-up immunity in a single channel, 2:1 (SPDT) configuration. The device

works with a single supply (4.5 V to 44 V), dual supplies (±4.5V to ±22V), or asymmetric supplies

(such as VDD = 12V, VSS = –5V). The TMUX7219 supports bidirectional analog and digital signals on the

source (Sx) and drain (D) pins ranging from VSS to VDD.

The TMUX7219 can be enabled or disabled by controlling the EN pin. When

disabled, both signal path switches are off. When enabled, the SEL pin can be used

to turn on signal path 1 (S1 to D) or signal path 2 (S2 to D). All logic control

inputs support logic levels from 1.8V to VDD, 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.

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.