TMUX121 Low-Capacitance, 2-Channel, 2:1 Switch with Power-Off Isolation

and 1.8-V Logic

1 Features

• Compatible with high-speed I3C signals

• High performance switch characteristics:

– Bandwidth (–3 dB): 3.0 GHz

– RON (typical): 3 Ω

– CON (typical): 1.7 pF

– TPD (typical): 60 ps

– TSWEK (typical): 2 ps

• Low current consumption: 12 µA (typical)

• Special features:

– IPOFF protection prevents current leakage in

Powered-Down state

– 1.8 V and 3.3 V compatible control inputs

(SEL, EN)

• 3.3 V supply voltage

• Industrial temperature range: –40 to 125°C

• Compact 10-pin 1.4 mm × 1.8 mm, UQFN package

2 Applications

• I3C (SenseWire)

• I3C and I2C peripheral switching

• Servers

• Handset: smart phone

• Notebook PC

• Tablet: multimedia

• Electronic point-of-sale

• Field instrumentation

• Portable monitor

3 Description

The TMUX121 is a high performance bidirectional

2-channel, 2:1 (SPDT) switch that supports both

differential and single ended signals. The TMUX121

is an analog passive switch which features power-off

protection forcing all I/O pins to be in high-impedance

mode when power is not present on the VDD pin. The

select and enable pins of the TMUX121 compatible

with 1.8 V and 3.3 V control voltage, allowing them

to be directly interfaced with the General purpose

I/O (GPIO) from low voltage processors. This, along

with the low on-resistance and low on capacitance of

the device, make the TMUX121 an excellent choice

for supporting switching a wide range of analog

signals and digital communication protocol standards,

including high-speed standards such as I3C.

The TMUX121 comes in a small 10-pin UQFN

package with only 1.8 mm × 1.4 mm in size, which

makes it useful when PCB area is limited.

Package Information

PART NUMBER

PACKAGE(1)

PACKAGE SIZE(2)

TMUX121

NKG (UQFN, 10)

1.8 mm × 1.4 mm

(1)

For all available packages, see the orderable addendum at

the end of the data sheet.

(2)

The package size (length × width) is a nominal value and

includes pins, where applicable.

Charge

Pump

D1

D2

S1A

S2A

S1B

S2B

SEL

EN

VDD

GND

Application Use Case

TMUX121

SCDS381 – AUGUST 2023

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.