THVD2450V中文资料德州仪器数据手册PDF规格书

1 Features

• Meets or exceeds the requirements of the TIA/

EIA-485A and TIA/EIA-422B standards

• 3-V to 5.5-V RS-485 supply voltage

• Differential output exceeds 2.1 V for PROFIBUS

compatibility with 5-V supply

• 1.65 V to 5.5 V Supply for logic signal interface

• SLR Pin Selectable Data Rates:

– THVD2410V, THVD2412V: 250 kbps and 1

Mbps

– THVD2450V, THVD2452V: 20 Mbps and 50

Mbps

• Bus I/O protection

– ±70-V DC bus fault

– ±16-kV HBM ESD

– Half duplex devices: ±15-kV IEC 61000-4-2

contact and air-gap discharge

– Full duplex devices: ±8-kV IEC 61000-4-2

contact and air-gap discharge

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

• Half-duplex and Full-Duplex devices available in

two speed grades

• Extended ambient temperature range: -40°C to

125°C

• Extended operational common-mode range: ±25 V

• Enhanced receiver hysteresis for noise immunity

• Low power consumption

– Low shutdown supply current: < 5 μA

– Quiescent current during operation: < 5.3 mA

• Glitch-free power-up/down for hot plug-in capability

• Open, short, and idle bus failsafe

• Thermal shutdown

• 1/8 unit load (up to 256 bus nodes) in -7 V to 12V

common mode range

• Small 3 mm x 3 mm VSON package to save board

space, or 14-SOIC for drop-in compatibility

2 Applications

• Motor drives

• Factory automation and control

• HVAC systems

• Building automation

• Grid infrastructure

• Electricity meters

• Process analytics

• Video surveillance

3 Description

THVD24xxV are ±70-V fault-protected, half and fullduplex

RS-422/RS-485 transceivers using a 1.65 V to

5.5 V supply for logic signal interface, and a 3 V to

5.5 V bus side supply. These devices have slew rate

select feature that enables them to be used at two

maximum speeds based on the SLR pin setting.

These devices feature integrated IEC ESD

protection, eliminating the need for external systemlevel

protection components. Extended ±25-V

input common-mode range makes reliable data

communication over longer cable run lengths and/or

in the presence of large ground loop voltages.

Enhanced 250-mV receiver hysteresis provides high

noise rejection. In addition, the receiver fail-safe

feature makes sure of a logic high when the inputs

are open or shorted together.