CXB1585N Просмотр технического описания (PDF) - Sony Semiconductor

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Компоненты Описание

производитель

CXB1585N

Fibre Channel Repeater

Sony Semiconductor 

3. Power supply

CXB1585N

3.3V

22µF

VCCT

0.1µF

22µF

VEET

VCCG

0.1µF

22µF

VEEG

VCCP

0.1µF

VEEP

Fig. 3. Power Supply Circuit

4. SDIN, SDIN∗ inputs

Normally, the VCO performs frequency comparison with the SDIN and SDIN∗ serial data. When there is no

input to SDIN and SDIN∗, frequency comparison is executed with REFCLK. However, the frequency may not

be compared to REFCLK if the noise and others are detected as a signal for no signal state because the both

phases of the ECL differential inputs are internally biased to VBB shown below. As countermeasure to this,

connect either of the differential inputs to VCC via a resistor to generate the voltage difference for the both

phases.

VCC

50Ω

TRANS.

LINE

220kΩ

330pF

18kΩ

VBB (VCC – 1.3V)

330pF

50Ω

50Ω

VTT (VCC – 2V)

18kΩ

ECL differential input buffer

ECL differential signal from 50Ω transmission line

Fig. 4. SDIN and SDIN∗ Input Example

– 11 –

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