TMUX1511 Low-Capacitance, 1:1 (SPST) 4-Channel, Powered-Off Protected Switch

with 1.8V Logic

1 Features

• Wide Supply Range: 1.5V to 5.5V

• Low On-Capacitance: 3.3pF

• Low On-Resistance: 2Ω

• High Bandwidth: 3GHz

• -40°C to +125°C Operating Temperature

• 1.8V Logic Compatible

• Supports Input Voltage Beyond Supply

• Integrated Pull Down Resistor on Logic Pins

• Bidirectional Signal Path

• Fail-Safe Logic

• Powered-off protection up to 3.6V

– Pinout compatible to SN74CBTLV3126

– Pinout compatible (logic variant) of

SN74CBTLV3125

2 Applications

• Servers

• Wired Networking

• Wireless Infrastructure

• Data Center Switches & Routers

• PC/Notebooks

• Building Automation

• ePOS

• Motor Drives

• Appliances

• Battery-Powered Equipment

• JTAG Isolation

• SPI Isolation

3 Description

The TMUX1511 is a complementary metal-oxide

semiconductor (CMOS) switch. The TMUX1511 offers

1:1 SPST switch configuration with 4 independently

controlled channels. Wide operating supply of

1.5V to 5.5V allows for use in a broad array

of applications from servers and communication

equipment to industrial applications. The device

supports bidirectional analog and digital signals on the

source (Sx) and drain (Dx) pins and can pass signals

above supply up to VDD x 2, with a maximum input/

output voltage of 5.5V.

Up to 3.6V on the signal path of the TMUX1511

provides isolation when the supply voltage is removed

(VDD = 0V). Without this protection feature, switches

can back-power the supply rail through an internal

ESD diode and cause potential damage to the

system.

Fail-Safe Logic circuitry allows voltages on the logic

control pins to be applied before the supply pin,

protecting the device from potential damage. All logic

control inputs have 1.8V logic compatible thresholds,

ensuring both TTL and CMOS logic compatibility

when operating in the valid supply voltage range.

Package Information

PART NUMBER

PACKAGE (1)

BODY SIZE (NOM)

TMUX1511

TSSOP (14)

5.00mm × 4.40mm

QFN (16)

2.60mm x 1.80mm

X2QFN (12)

1.60mm x 1.60mm

(1)

For all available packages, see the package option

addendum at the end of the data sheet.

S1

S2

S3

S4

SEL2

SEL4

Processor

GND

VDD

VDD

VI/O

1.8V Logic

I/O

SEL3

SEL1

GND

JTAG, SPI, GPIO

Port

JTA G

DEBUG,

SPI, GPIO

D1

D2

D3

D4

FLASH

RAM

CPU

Per ipheral s

TDI / MIS O / GPIO

TDO / MOSI / GPIO

TCK / SCLK / GPIO

TMS / SS / GPIO

0.1µF

Application Example

TMUX1511

SCDS390B – SEPTEMBER 2018 – REVISED MARCH 2025

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.