Datasheet

DS26504 T1/E1/J1/64KCC BITS Element
26 of 129
6.3 Line Build-Out
Table 6-3. E1 Line Build-Out
L2
PIN 13
L1
PIN 12
L0
PIN 11
APPLICATION
N
(Note 1)
RETURN
LOSS
Rt
(Note 1)
0 0 0 75Ω normal 1:2 N.M. 0
0 0 1 120Ω normal 1:2 N.M. 0
1 0 0 75Ω with high return loss (Note 2) 1:2 21dB 6.2Ω
1 0 1 120Ω with high return loss (Note 2) 1:2 21dB 11.6Ω
1 1 0
75Ω normal + enable transmit and receive
gapped clock
1:2 N.M 0
1 1 1
120Ω normal + enable transmit and receive
gapped clock
1:2 N.M 0
Table 6-4. T1 Line Build-Out
L2
PIN 13
L1
PIN 12
L0
PIN 11
APPLICATION
N
(Note 1)
RETURN
LOSS
Rt
(Note 1)
0 0 0 DSX-1 (0 to 133 feet)/0dB CSU 1:2 N.M. 0
0 0 1 DSX-1 (133 to 266 feet) 1:2 N.M. 0
0 1 0 DSX-1 (266 to 399 feet) 1:2 N.M. 0
0 1 1 DSX-1 (399 to 533 feet) 1:2 N.M. 0
1 0 0 DSX-1 (533 to 655 feet) 1:2 N.M. 0
1 0 1 Reserved — — —
1 1 0 Reserved — — —
1 1 1
DSX-1 (0 to 133ft)/0dB CSU + enable
transmit and receive gapped clock
1:2 N.M. 0
N.M. = not meaningful
Note 1: Transformer turns ratio.
Note 2: TTD pin must be connected high in this mode.