XRT59L921IB Exar Corporation, XRT59L921IB Datasheet - Page 23

• Manufacturer Part Number: XRT59L921IB
• Description: 21 CHANNEL E1 LIU
• Manufacturer: Exar Corporation

Specifications of XRT59L921IB

• Lead Free Status / RoHS Status: Contains lead / RoHS Compliant

REV. 1.2.1
P.O. Box 5826
Redwood City, CA 94063
Tel: [phone]
FAX: [phone]
The Receive Sections of the XRT59L921 consists of the following blocks:
•
•
•
•
The design of each channel (within the XRT59L921) permits the user to transformer-couple the Receive
Section to the line. Additionally, as mentioned earlier, the specification documents for E1 specify 75Ω
termination loads, when transmitting over coaxial cable, and 120Ω loads, when transmitting over twisted-pair.
Figure
(of the XRT59L921) to the line.
F
L
2.0 THE RECEIVE SECTION
2.1
IGURE
INE FOR
The Receive Equalizer block
The Peak Detector and Slicer block
The LOS Detector block
The Receive Output Interface block
9, and
9. R
Interfacing the Receive Sections to the Line (Transformer Coupling)
75Ω A
RxPOS_n
RxNEG_n
ECOMMENDED
LOS_n
Figure 10
PPLICATIONS
present the two methods that the user can employ in order to interface the Receivers
S
CHEMATIC FOR
(T
RANSFORMER
RxPOS_n
RxNEG_n
LOS_n
XRT59L921
I
NTERFACING THE
-C
OUPLING
RRING_n
RTIP_n
TWENTY-ONE CHANNEL E1 LINE INTERFACE UNIT
21
)
R
ECEIVE
75 Ω
S
ECTIONS OF THE
1:1
XRT59L921
Coaxial cable
XRT59L921
TO THE