BT8376EPF datasheet(273/323 Pages) CONEXANT

Part #	BT8376EPF

Description	single chip transceivers for T1/E1 and Integrated Service Digital Network (ISDN) primary rate interfaces

PDF	323 Pages

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Manufacturer	CONEXANT [Synaptics Incorporated.]

Direct Link	https://www.synaptics.com/

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273 / 323 page

Bt8370/8375/8376

4.0 Applications

Fully Integrated T1/E1 Framer and Line Interface

4.1 External Component Specifications

N8370DSE

Conexant

4-9

Figure 4-4. Option D: Short Haul Interface Application

NOTE(S):

(1) 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

Ω, 1/4 W, 1% Resistors. The two 470 Ω resistors in series with RTIP/RRING are used to limit the current going into the

device while the power is off and T1/E1 lines are connected.

(2) Optional programmable receive termination –75/100/120

Ω.

(3) Optional fixed transmit termination. The value shown provides acceptable transmit return loss for T1 and E1 applications.

(4) Required fixed receive termination. The parallel combination of the fixed termination and programmable termination must

match the line impedance.

(5) VSET Resistor. The VSET resistance value controls the transmit signal amplitude.

(6) The Physical area between the connector and chokes should be kept small in order to avoid high frequency coupling and to

improve emissions test

BT8376EPF Datasheet(PDF) 273 Page - Synaptics Incorporated.