TMUX7348F datasheet(1/59 Pages) TI

Part #	TMUX7348F

Description	TMUX734xF 짹60-V Fault-Protected, 8:1 and Dual 4:1 Multiplexers with Adjustable Fault Threshold, Latch-up Immunity, and 1.8-V Logic

PDF	59 Pages

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Manufacturer	TI [Texas Instruments]

Direct Link	http://www.ti.com

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TMUX734xF ±60-V Fault-Protected, 8:1 and Dual 4:1 Multiplexers with Adjustable

Fault Threshold, Latch-up Immunity, and 1.8-V Logic

1 Features

• Wide supply range:

– Dual supply: ±5 V to ±22 V

– Single supply: 8 V to 44 V

• Integrated fault protection:

– Overvoltage protection, source to supplies or

source to drain: ±85 V

– Overvoltage protection: ±60 V

– Power-off protection: ±60 V

– Adjustable overvoltage triggering thresholds

• VFP: 3 V to VDD, VFN: 0 V to VSS

– Interrupt flags to indicate overall and specific

fault channel information

– Non-fault channels continue to operate with low

leakage currents

– Output clamped to the fault supply in

overvoltage condition

• Latch-up immunity by device construction

• 1.8-V Logic capable

• Fail-safe logic: up to 44 V independent of supply

• Break-before-make switching

• Industry-standard TSSOP and smaller WQFN

package

2 Applications

• Factory automation and control

• Programmable logic controllers (PLC)

• Analog input modules

• Semiconductor test equipment

• Battery test equipment

• Servo drive control module

• Data acquisition systems (DAQ)

SW

S1

S2

D

V

DD

V

SS

TMUX7348F

SW

S8

Fault Detec on/

Switch Driver/

Logic Decoder

A0

A1

A2

EN

V

FN

V

FP

FF

SF

SW

S1A

DA

V

DD

V

SS

TMUX7349F

Fault Detec on/

Switch Driver/

Logic Decoder

A0

A1

EN

V

FN

V

FP

FF

SF

S4A

SW

S1B

DB

S4B

Functional Block Diagram

3 Description

The TMUX7348F and TMUX7349F are modern

complementary metal-oxide semiconductor (CMOS)

analog multiplexeres in 8:1 (single ended) and 4:1

(differential) configurations. The devices work well

with dual supplies (±5 V to ±22 V), a single supply (8

V to 44 V), or asymmetric supplies (such as VDD = 12

V, VSS = –5 V). The overvoltage protection is available

in powered and powered-off conditions, making the

TMUX7348F and TMUX7349F devices suitable for

applications where power supply sequencing cannot

be precisely controlled.

The device blocks fault voltages up to +60 V and –60

V relative to ground in both powered and powered-off

conditions. When no power supplies are present, the

switch channels remain in the OFF state regardless of

switch input conditions and logic control status. Under

normal operation conditions, if the analog input signal

level on any Sx pin exceeds positive fault supply (VFP)

or negative fault supply (VFN) by a threshold voltage

(VT), the channel turns OFF and the Sx pin becomes

high impedance. When the fault channel is selected,

the drain pin (D or Dx) is pulled to the fault supply

voltage (VFP or VFN) that was exceeded. The devices

provide two active-low interrupt flags (FF and SF) to

provide details of the fault. The FF flag indicates if any

of the source inputs are experiencing a fault condition,

while the SF flag is used to decode which specific

inputs are experiencing a fault condition.

The low capacitance, low charge injection, and

integrated fault protection enables the TMUX7348F

and TMUX7349F devices to be used in front end

data acquisition applications where high performance

and high robustness are both critical. The devices are

available in standard TSSOP package and smaller

WQFN package (ideal if PCB space is limited).

Device Information(1)

DEVICE NUMBER

PACKAGE

BODY SIZE (NOM)

TMUX7348F

TMUX7349F

TSSOP (20)(2)

6.50 mm × 4.40 mm

WQFN (20)(3)

4.00 mm × 4.00 mm

(1)

For all available packages, see the orderable addendum at

the end of the data sheet.

(2)

Preview package.

(3)

Preview package for TMUX7349F.

TMUX7348F

SCDS400 – MARCH 2022

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.

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