xrt59l921 Exar Corporation, xrt59l921 Datasheet - Page 25

• Manufacturer Part Number: xrt59l921
• Description: Xrt59l921 -twenty-one Channel E1 Line Interface Unit
• Manufacturer: Exar Corporation

REV. 1.2.1
TRANSFORMER RECOMENDATION
Figure 11
the line.
F
F
2.2
IGURE
IGURE
RxNEG_n
RxPOS_n
11. R
12. R
LOS_n
Interfacing the XRT59L921 Receive Section to the Line (Capacitive Coupling)
and
ECOMMENDED
ECOMMENDED
Figure 12
RxNEG_n
RxPOS_n
LOS_n
R
are recommended methods to Interface the the receive sections of the XRT59L921to
ECEIVE
75Ω C
120Ω T
RxPOS_n
RxNEG_n
LOS_n
XRT59L921
Leakage Inductance
APACITIVE
T
Primary Inductance
WISTED
RANSFORMER
Isolation Voltage
P
RRING_n
Turns Ratio
RTIP_n
ARAMETER
RxPOS_n
RxNEG_n
LOS_n
XRT59L921
P
C
AIR
OUPLING
RRING_n
C
R
RTIP_n
APACITIVE
ECOMMENDATIONS
TWENTY-ONE CHANNEL E1 LINE INTERFACE UNIT
23
240 Ω
A
PPLICATION
0.1 µF
0.1 µF
C
OUPLING
150 Ω
0.1 µF
0.1 µF
V
A
ALUE
1:1
PPLICATION
240 Ω
150 Ω
Coaxial Cable
120 Ω Twisted
Pair Cable
XRT59L921