E981.03A38HB ELMOS Semiconductor, E981.03A38HB Datasheet - Page 14

• Manufacturer Part Number: E981.03A38HB
• Description: Interface - Specialized KNX/EIB transceiver
• Manufacturer: ELMOS Semiconductor

Specifications of E981.03A38HB

• Rohs: yes
• Product Type: KNX/EIB Transceiver
• Operating Supply Voltage: 3.3 V
• Supply Current: 10 mA
• Maximum Power Dissipation: 1 W
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: QFN-32
• Minimum Operating Temperature: - 25 C

Table 1. Recommended Components
1) Only necessary in case of the E981.03 being connected to a separate application module. These components only ensuring to
meet the absolute maximum rating in case of connecting and disconnecting the application module. If the connector guarantees
to connect GND potential first, the ESD protection is not needed.
5 Interfaces Description
5.1 KNX/ EIB – Interface
The KNX/ EIB - Interface is a full compatible KNX TP1
transceiver with autonomous Medium Access Control
and individual physical Address. The telegram on KNX
bus is analyzed and dependent on its contents and
5.2 UART – Interface
The E981.03 has a full duplex UART interface to trans-
mit and receive bytes asynchronously. The protocol be-
tween E981.03 and host controller is a two-wire proto-
col with software handshake.
The UART host interface consists of the following three
parts
•
ELMOS Semiconductor AG reserves the right to change the detail specifications as may be required to permit improvements in the design of its products.
Component Recommended value
U1
D1
C
C
C
L
C
C
C
D
C
R
C
Q
R
R
D
SPS
KNX/ EIB TRANSCEIVER
PRODUCTION DATA - JUL 2, 2012
TX
VCC
ELMOS Semiconductor AG
ST
CST
20
VCC
CVCC
CVIO
33I
REC
SET
VIO
SPS
UART physical layer realizes media access and bit
decoding / encoding or output driver for KNX by-
pass in Analog Mode
1)
1)
1)
model: SMAJ43CA, SMBJ43CA
model: BYG21
330 µF / 35 V
ceramic 100 nF / 35 V
22 µF / 35 V
330 µH, R
47 µF / 6 V
ceramic 100 nF / 8V
ceramic 100 nF / 8V
40 V, 200 mA, t
ceramic 100 nF
47 Ω
Ceramic 56 nF
f = 7.3728 MHz, tolerance 50 ppm
1 kΩ
1 kΩ
6.2 V, 500 mW
LSPS
,typ = 3 Ω,R
rr
< 15 ns
LSPS,max
= 10 Ω, I
Data Sheet
14/51
sat,SPS
= 160 mA, T
communication mode, the data will be processed.
In Analog Mode, the signals SEND and REC are directly
bypassed to the host UART interface pins RXD and TXD.
•
•
To secure UART communication, a CRC calculation for
receive and transmit path can be activated separately.
UART logical layer provides byte framing capabili-
ties
UART service layer defines control and data access
sequences
amb
< 85 °C ±20%
Remarks
ESR < 1 Ω
±20%
ESR < 1 Ohm
0.2 Ω < ESR < 0.8 Ω
±20%
±20%
e.g. BAT64
±20%
±5 % / 1 W
±10 %
Do not use external capaci-
tors or crystals with internal
capacitors.
QM-No.: 25DS0046E.01
E981.03