MT9074 Просмотр технического описания (PDF) - Mitel Networks

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Компоненты Описание

производитель

MT9074

T1/E1/J1 Single Chip Transceiver

Mitel Networks 

MT9074

Advance Information

Name

TX2-0

Functional Description

Transmit pulse amplitude. Select the TX2 –TX0 bits according to the line type, value of

termination resistors (RT), and transformer turns ratio used

TX2 TX1 TX0 Line Impedance(Ω) RT(Ω) Transformer Ratio

000

120

0

1:2

001

120

0

1:1

010

120

15

1:2

011

120 / 75

12.1

1:2

100

75

0

1:2

101

75

0

1:1

111

75

9.1

1:2

111

75 / 120

12.1

1:2

After reset these bits are zero.

Table 2 -Transmit Pulse Amplitude (E1)

TTIP

0.68uF RT

Tx

1:2

Fuse

TRING

RTIP

RRING

RT

+5V

120 Ω /

75 Ω

Fuse

RT: Termination resis-

tor. Please check Table

2 for specific resistor

1:1

Fuse values.

Fuse

Rx

Figure 6 - Analog Line Interface (E1)

10

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