BT8376EPF datasheet(96/323 Pages) CONEXANT

Part #	BT8376EPF

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

PDF	323 Pages

Scroll/Zoom	100%

Manufacturer	CONEXANT [Synaptics Incorporated.]

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

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2.0 Circuit Description

Bt8370/8375/8376

2.9 Transmit Line Interface Unit

Fully Integrated T1/E1 Framer and Line Interface

2-68

Conexant

N8370DSE

2.9 Transmit Line Interface Unit

The Transmit Line Interface Unit (TLIU), illustrated in Figure 2-33, converts P

and N rail NRZ data to AMI pulses. The P and N rail NRZ data is generated by

the XMTR, converted to AMI bipolar pulses by the TLIU, and output on the

transmit tip and ring pins, XTIP and XRING. The TLIU has a configurable line

rate, pulse shape, Line Build Out (LBO), external termination resistor, and

transformer turns ratio.

The TLIU consists of a control circuit, a pulse template ROM, a set of LBO

filters, a Digital-to-Analog Converter (DAC), and a line driver.

Figure 2-33. TLIU Diagram

NOTE(S):

LBO filter block is not present in short haul devices: Bt8375 and Bt8376.

LBO

Filters

DAC

DRV

XTIP

XRING

TCKO

XOE

Pulse

Shape

AIS

Gen

TPLL

Analog Loopback

From JAT

To JAT

TPOS

TNEG

BT8376EPF Datasheet(PDF) 96 Page - Synaptics Incorporated.