1 Features

• Meets or exceeds the requirements of the TIA/

EIA-485A standard

• 3V to 5.5V Supply Voltage

• Industry's smallest surge-integrated RS-485 device

in 9mm2 package

• VIO Support from 1.65V to VCC supply level

• Bus I/O protection

– ± 3kV/42Ω IEC 61000-4-5 1.2/50μs surge

(SOIC)

– ± 1.5kV/42Ω IEC 61000-4-5 1.2/50μs surge

(VSON)

– ± 8kV IEC 61000-4-2 Contact discharge

– ± 4kV IEC 61000-4-4 Electrical fast transient

– ± 15kV HBM ESD

– ± 42V DC bus fault

• Available in two speed grades

– THVD2419: 250kbps

– THVD2429: 20Mbps

• Extended ambient

temperature range: -40°C to 125°C

• Extended operational

common-mode range: ± 25V

• Large receiver hysteresis for noise rejection

• Low power consumption in shutdown mode: < 5μA

• Glitch-free power-up and down for hot plug-in

capability

• Open, short, and idle bus failsafe

• 1/8 Unit load (up to 256 bus nodes)

• Industry standard 8-pin SOIC

for drop-in compatibility

• Small surge-integrated RS-485 device in 3mm x

3mm leadless (VSON) package

2 Applications

• Wireless infrastructure

• Factory automation

• Motor drives

• Building automation

• HVAC

• Grid infrastructure

3 Description

THVD24x9 devices are half-duplex RS-485

transceivers with integrated surge protection. Surge

protection is achieved by integrating transient voltage

suppressor (TVS) diodes in the standard 8-pin SOIC

(D) package as well as small 10-pin VSON package.

This feature increases the reliability by providing

better immunity to noise transients coupled to the

data cable which eliminates the need for external

protection components.

THVD24x9 devices in the standard pin-out SOIC

package operate from a single 3.3V or 5V supply. In

addition, THVD24x9 devices in 10-pin VSON package

support an additional VIO supply to operate the IOs

from as low as 1.65V supply level. The devices in this

family feature a wide common-mode voltage range

making them suitable for multi-point applications over

long cable runs.