XRT59L921IB Exar Corporation, XRT59L921IB Datasheet - Page 19

• 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
Figure
Terminal Equipment must do the following:
•
•
The purpose of the Transmit Pulse Shaping circuit is to generate Transmit Output pulses that comply with the
ITU-T G.703 Pulse Template Requirements for E1 Applications.
F
GIVEN
1.3
IGURE
Not apply a signal on the TxClk_n line and connect TxClk to "High"
When applying a pulse (to either the TxPOS_n or TxNEG_n input pin), apply an RZ pulse to the appropriate
input pin. This RZ pulse should only have a width of one-half the bit-period.
C
5, indicates that when the user is operating a channel in the Clockless Mode, then the corresponding
5. I
HANNEL
The Pulse Shaping Circuit
LLUSTRATION ON HOW THE
TxPOS_n
TxNEG_n
TClk_n
(
WITHIN THE
DATA
XRT59L921),
Period
Bit
1
T
ERMINAL
half of the bit-period
1
WHEN OPERATING IN THE
applied in the first
RZ Pulse is to be
E
QUIPMENT SHOULD APPLY DATA TO THE
1
No Activity in TxClk Line, TxClk_n="High"
0
TWENTY-ONE CHANNEL E1 LINE INTERFACE UNIT
17
1
half of the bit-period
applied in the 2nd
No Pulse is to be
C
LOCKLESS
1
M
0
ODE
T
RANSMIT
XRT59L921
S
ECTION OF A