CN8380EPF CONEXANT [Conexant Systems, Inc], CN8380EPF Datasheet - Page 39

• 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]

CN8380
Quad T1/E1 Line Interface
N8380DSA
Option D
Option C
Option C uses the standard 1:2 transformer 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. Series protection resistors
(Rs) are included. Option C is available only in Host Mode.
Table 2-6. Transmit Termination Option C
Option D uses the standard 1:2 transformer. A common parallel termination (Rt)
for both T1 and E1 applications is included to provide line impedance matching.
Series protection resistors (Rs) are also included. Option D is available in both
Host Mode and Hardware Mode.
Table 2-7. Transmit Termination Option D
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 = 1 [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: HTERM = 1
3. Host Mode: ALT_TR = 0, TERM = 1, T_BOOST = 1 [TLIU_CR; addr n2]
Application
Application
Advance Information
Series Resistors
Series Resistors
Conexant
2 × 5.6
2 × 5.6
2 × 5.6
2 × 5.6
2 × 5.6
2 × 5.6
2 × 5.6
2 ×5.6
(Rs)
(Rs)
Parallel Termination
Parallel Termination
(Rt,
(Rt,
114.8
190.0
None
None
21
21
21
21
)
)
2.0 Circuit Description
Return Loss
Return Loss
2.4 Transmitter
(dB)
(dB)
–10
–10
–30
–18
–18
–30
0
0
2-17