XRT59L91 Datasheet, PDF (12/28 Pages) Exar Corporation – Single-Chip E1 Line Interface Unit

XRT59L91
Preliminary
TxPOS
T xN E G
T xLineC lk
U1
2
TxPOS
3
T xN E G
1
T xC lk
13
T T IP
1
R1 ₂
9.1
15
T R in g
1
R2 ₂
9.1
1 ^1:2 5
4
8
PE-65835
T T IP
T R IN G
XRT59L91
Figure 6. Illustration of how to interface the Transmit Section of the XRT59L91
device to the Line (for “120W ” Applications)
Notes:
1. Figures 5 and 6 indicate that for both “75W and “120W ”
applications, the user should connect a 9.1W resistor,
in series, between the TTIP/TRing outputs and the
transformers.
2. Figure 5 and 6 indicate that the user should a “1:2
STEP-UP” Transformer.
Rev. P2.00
12