PSB21373HV1.1XT Infineon Technologies, PSB21373HV1.1XT Datasheet - Page 84
PSB21373HV1.1XT
Manufacturer Part Number
PSB21373HV1.1XT
Description
Manufacturer
Infineon Technologies
Datasheet
1.PSB21373HV1.1XT.pdf
(242 pages)
Specifications of PSB21373HV1.1XT
Lead Free Status / RoHS Status
Compliant
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2.3.9
The SCOUT-DX covers the electrical requirements of the line interface for loop lengths
of up to 1.8 km (6 kft) on AWG 24 cable.
In order to additionally reduce the bit error rate in severe conditions, the SCOUT-DX
performs oversampling of the received signal and uses majority decision logic. The
receive signal is sampled at 15.36 MHz clock intervals (XTAL).
2.3.10
The connection of the line transformer is shown in figure 45. External to the line interface
pins Lla and Llb a transformer and external resistors are connected as shown. Note that
the internal resistors of the transformer are calculated as zero. The actual values of the
external resistors must take into account the real resistor of the chosen transformer.
Figure 45
Connection of the Line Transformers to the SCOUT-DX
Because the SCOUT-DX will generate a voltage swing of about 1.4 Vpk at LIa/Llb (figure
44), a 2:1 transformer is needed to achieve the required 0.65 Vpk on the line interface.
E.g. the use of a VAC 3-M5032-X013 transformer is recommended.
Data Sheet
Receiver Characteristics
Line Interface Circuitry
SCOUT-DX
LIa
LIb
84
100 nF
2 : 1
ext_line_circui
330 nF
t d vsd
Line Interface
PSB 21373
2002-05-13
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