XR-T5793IJ 查看數據表（PDF） - Exar Corporation

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XR-T5793IJ

Quad E1 Line Interface Unit

Exar Corporation 

XR-T5793

BLOCK DIAGRAM

75Ω Unbalanced

(Without Transformer) TIP

Impedance Selectable

Receivers. Return

Loss Exceeds G7.03.

0.1µF

75

Impedance

Selectable

Tristate

Drivers Return

Loss Exceeds

ETSI 300 166

120Ω Balanced

(or 100Ω )

TIP

RX INPUT

RING

PE-65834

TTI-7148

LOS Threshold Based on G.775

RXIN

100

or

120

E1/T1-

LOOPSEL (1.0)

LOOPEN

LPMOD

TIP

120Ω,100Ω or

75Ω Balanced

TX OUTPUT

RING

PE-65839

TTI-7149

75Ω Unbalanced TIP

(Without Transformer)

0.1µF

TXOUT

Rout1

TXEN

ROUT1

Level

Detector

Peak

Detector

Slice

Voltage

Driver

Transceiver 1

Transceiver 2

Transceiver 3

Transceiver 4

LOS

Slicer

L

o RXPOS

c

a RXNEG

l

/

R

e

m

o

t

e

L TXPOS

o

o

TXNEG

p TCLK

b

a

c

k

Note

1ROUT = 68Ω for 120Ω line impedance, ROUT = 62Ω for 100Ω line impedance, ROUT = 68Ω for 75Ω line impedance

Figure 1. Block Diagram

Rev. 2.00

2

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