GAMMA instabus
OEM- Product Catalogue
Release: February 2012
KNX EIB TP-UART 2-IC
Siemens AG pages 42 Technical Manual
Infrastructure and Cities Sector,
Building Technologies
Control Products and Systems © Siemens AG 2012 page 1
P. O. Box 10 09 53, Subject to change without further notice.
D-93009 Regensburg
Features
• Signaling for standard UART (LSB-
First, Idle is 1)
• Baud rate 9600 or 19200 for the
communication: TP-UART 2 Host
– Controller
• Direct coupling to host controller (TxD,
RxD), or via optical couplers (optional)
• 2-wire protocol with software
handshake
• Buffering of sent frames
• No critical timing during transmission
• VCC switchable between 3.3 V
and 5 V
• Efficiency of VCC-supply ≥ 75 %
• I
VCC
≤ 30mA (50 mA if no load at V20)
• Switchable V20 power supply
20V/25mA with limiting function
• I
V20max
adjustable in steps
• IVB+max overshoot due to load
changes actively limited
• Operating temperature range: -25°C to
85°C
• Small QFN36X36 package
GENERAL DESCRIPTION
The TP - UART - IC (Twisted Pair - Universal Asynchronous Receive Transmit - IC) is a
transceiver which supports the connection of microcontrollers of sensors, actuators, or other
applications to the EIB (European - Installation - Bus).
This module supports every transmit- and receive - function and also the high ohmic decoupling
of energy from bus line. It generates further a stabilized 3.3V or 5V supply to use by a host
controller. Up to 256 subscribers can be connected to one bus line.
An UART interface is realized for communication with a host controller. The coupling can be
realized directly or via optical couplers.
The TP - UART - IC consists of two main parts: the digital part (UART - Interface) and the analog
part (analog circuit part).
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