MT9075B Просмотр технического описания (PDF) - Zarlink Semiconductor Inc

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производитель

MT9075B

E1 Single Chip Transceiver

Zarlink Semiconductor Inc 

MT9075B

Transformer Recommendation

Table 1 shows a list of recommended transformers for the MT9075B line interface.

Data Sheet

Manufacturer

For Tx

For Rx

Filtran

5721-1

5721-2

Pulse Engineering PE-65351 PE-64934

Midcom

50027

50026

OSEC

02934/A

02935/A

Table 1 - Transformer Manufacturers and Part Numbers

Timing Source

The MT9075B can use either a clock or crystal, connecting to pins OSC1 and OSC2, as the reference timing

source.

Figure 6 shows a 20 MHz clock oscillator, with 50 ppm tolerance, directly connected to the OSC1 pin of the

MT9075B.

MT9075B

OSC1

+5V

20MHz

OUT

Vdd

GND

.1µF

OSC2

(open)

Figure 6 - Clock Oscillator Circuit

Alternatively, a crystal oscillator may be used. A complete oscillator circuit made up of a crystal, resistors and

capacitors is shown in Figure 7. The crystal specification is as follows.

Frequency:

Tolerance:

Oscillation Mode:

Resonance Mode:

Load Capacitance:

Maximum Series Resistance:

Approximate Drive Level:

20 MHz

50 ppm

Fundamental

Parallel

32 pF

35 Ω

1 mW

11

Zarlink Semiconductor Inc.

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