CN8380EPF CONEXANT [Conexant Systems, Inc], CN8380EPF Datasheet - Page 38

• Manufacturer Part Number: CN8380EPF
• Description: integrated quad line interface unit unit for both 1.544 Mbps (T1) and 2.048 Mbps (E1) applications
• Manufacturer: CONEXANT [Conexant Systems, Inc]

2.0 Circuit Description
2.4 Transmitter
2-16
Option A
Option B
Option A uses the standard 1:2 transformer, no series protection resistors (Rs),
and no parallel termination (Rt) for T1 applications. In E1 applications, Rt is
included because it is usually required to provide a minimal level of line
impedance matching.
Table 2-4. Transmit Termination Option A
Option B uses the standard 1:2 transformer and no series protection resistors (Rs).
A common parallel termination (Rt) for both T1 and E1 applications is included
to provide line impedance matching.
Table 2-5. Transmit Termination Option B
T1—DSX-1
E1—75
E1—120
T1— I.431
NOTE(S):
1. Standard Transformer (1:2 turns ratio)
2. Hardware Mode: HTERM=0
3. Host Mode: ALT_TR = 0, TERM = 0, T_BOOST = 0 [TLIU_CR; addr n2]
T1—DSX-1
E1—75
E1—120
T1— I.431
NOTE(S):
1. Standard Transformer (1:2 turns ratio)
2. Hardware Mode: Not applicable
3. Host Mode: ALT_TR = 0, TERM = 1, T_BOOST = 0 [TLIU_CR; addr n2]
Application
Application
Advance Information
Series Resistors
Series Resistors
Conexant
None
None
None
None
None
None
None
None
(Rs)
(Rs)
Parallel Termination
Parallel Termination
(Rt,
(Rt,
126.4
204.4
None
None
23.7
23.7
23.7
23.7
)
)
Quad T1/E1 Line Interface
Return Loss
Return Loss
(dB)
(dB)
N8380DSA
–10
–10
–30
–18
–18
–30
0
0
CN8380