MT9074 Просмотр технического описания (PDF) - Zarlink Semiconductor Inc

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производитель

MT9074

T1/E1/J1 Single Chip Transceiver

Zarlink Semiconductor Inc 

Name

TXL2-0

MT9074

Data Sheet

Functional Description

Transmit Line Build Out 2 - 0. Setting these bits shapes the transmit pulse as detailed in

the table below:

TXL2

TXL1

TXL0

Line Build Out

0

0

0

0 to 133 feet/ 0 dB

0

0

1

133 to 266 feet

0

1

0

266 to 399 feet

0

1

1

399 to 533 feet

1

0

0

533 to 655 feet

1

0

1

-7.5 dB

1

1

0

-15 dB

1

1

1

-22.5 dB

After reset these bits are zero.

Table 1 - Transmit Line Build Out (T1)

TTIP

0.47 uF RT

TRING

RTIP

RRING

RT

+5 V

100 Ω

1:2

Fuse

Tx

**

1:1

*

Fuse

Fuse

RT: 2.4 Ω

Fuse

* Recommended Rectifier bridge

diodes are MUR460 (due to low

capacitance).

** Recommended Zero-Diode is

1N5339 (due to high capacitance)

Rx

Figure 5 - Analog Line Interface (T1)

19

Zarlink Semiconductor Inc.

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