BT8375 CONEXANT [Conexant Systems, Inc], BT8375 Datasheet - Page 273

• Manufacturer Part Number: BT8375
• Description: single chip transceivers for T1/E1 and Integrated Service Digital Network (ISDN) primary rate interfaces
• Manufacturer: CONEXANT [Conexant Systems, Inc]

Bt8370/8375/8376
Fully Integrated T1/E1 Framer and Line Interface
Figure 4-4. Option D: Short Haul Interface Application
N8370DSE
NOTE(S):
(1)
(2)
(3)
(4)
(5)
(6)
Chip side secondary surge protection. Diodes should be low capacitance, fast turn-on Schottky or surge protection diodes.
These components are: 1. Schottky Diode—11DQ04 (disrete) or 10BQ040 (surface mount) International Rectifier, 2. two
2.1 , 1/4 W, 1% Resistors. The two 470
device while the power is off and T1/E1 lines are connected.
Optional programmable receive termination –75/100/120 .
Optional fixed transmit termination. The value shown provides acceptable transmit return loss for T1 and E1 applications.
Required fixed receive termination. The parallel combination of the fixed termination and programmable termination must
match the line impedance.
VSET Resistor. The VSET resistance value controls the transmit signal amplitude.
The Physical area between the connector and chokes should be kept small in order to avoid high frequency coupling and to
improve emissions test
resistors in series with RTIP/RRING are used to limit the current going into the
Conexant
4.1 External Component Specifications
4.0 Applications
4-9