PSB3186HV14XP Lantiq, PSB3186HV14XP Datasheet - Page 48
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PSB3186HV14XP
Manufacturer Part Number
PSB3186HV14XP
Description
Manufacturer
Lantiq
Datasheet
1.PSB3186HV14XP.pdf
(200 pages)
Specifications of PSB3186HV14XP
Number Of Line Interfaces
1
Control Interface
HDLC
Lead Free Status / Rohs Status
Compliant
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Protection Circuit for Transmitter
Figure 23
Figure 23
The external resistors (R = 5 ... 10 W ) are required in order to adjust the output voltage
to the pulse mask on the one hand and in order to meet the output impedance of
minimum 20 W (transmission of a binary zero according to ITU-T I.430) on the other
hand.
Two mutually reversed diode paths protect the device against positive or negative
overvoltages on both lines.
An ideal protection circuit should limit the voltage at the SX pins from – 0.4 V to V
+ 0.4 V. With the circuit In
V
becoming active if the 96 kHz test signal is applied while no supply voltage is present.
Protection Circuit for Receiver
Figure 24
receiver. Protection of symmetrical receivers is rather simple.
Data Sheet
DD
+ 0.7 V. The resulting forward voltage of 1.4 V will prevent the protection circuit from
illustrates the secondary protection circuit recommended for the transmitter.
illustrates the external circuitry used in combination with a symmetrical
SX1
SX2
External Circuitry for Transmitter
Figure 23
R
R
the pin voltage range is increased from – 1.4 V to
48
Vdd
Description of Functional Blocks
1:1
3186_23
S Bus
ISAC-SX TE
PSB 3186
2003-01-30
DD
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