1 Features

? Meets or exceeds the requirements of the TIA/

EIA-485A standard

? 3-V to 5.5-V Supply voltage

? Differential output exceeds 2.1 V for PROFIBUS

compatibility with 5-V supply

? Half-duplex RS-422/RS-485

? Pin controlled on-chip 120 Ω termination resistor

between the bus pins

? Maximum Data rate configurable

– SLR = High: 500 kbps

– SLR = Low or floating: 20 Mbps

? Bus I/O protection

– ±16-kV HBM ESD

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

– ±15-kV IEC 61000-4-2 Air gap discharge

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

– ±16-V bus fault protection (absolute max

voltage on bus pins)

? Extended industrial temperature range:

-40°C to 125°C

? Low power consumption

– Shutdown supply current < 5 μA

– Quiescent current during operation < 3 mA

? Glitch-free power-up/power-down for hot plug-in

capability

? Open, short, and idle bus failsafe

? 1/8 Unit load (Up to 256 bus nodes)

? Small, space-saving thermally efficient 10-pin

VSON package (3 mm x 3 mm)

2 Applications

? Factory automation & control

? Building automation

? Motor drives

? Power delivery

? Industrial transport

? HVAC systems

? Smart meters

3 Description

The THVD1454 is a flexible half-duplex RS-485

transceiver for industrial applications. The device has

features such as on-chip, 120-Ω termination resistor

and driver output slew rate control. Both the features

are pin controlled. This enables the device to be

used at any node location (end nodes or middle

nodes) in any network, slow or fast. End-equipment

designers can now design a common printed circuit

board (PCB), and configure the PCB using software

for various application needs. This can save design

and qualification time for the customers.

The bus pins are immune to high levels of IEC

Contact Discharge ESD events, eliminating the need

for additional system level protection components.

The device operates from a single 3-V to 5.5-V

supply. The wide common-mode voltage range and

low input leakage on bus pins makes the device

suitable for multi-point applications over long cable

runs.

THVD1454 is available in space-saving thermally

efficient 10-VSON package (3 mm x 3 mm). The

device is characterized for ambient temperature from

–40°C to 125°C.