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.