CXB1595AN Просмотр технического описания (PDF) - Sony Semiconductor

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производитель

CXB1595AN

Fibre Channel Repeater

Sony Semiconductor 

CXB1595AN

Description of Operation

1. Clock and data recovery

The PLL in the clock and data recovery block must be frequency locked to the external REFCLK before locking

to the data.

The LKREFN pin is used to lock the frequency. When the LKREFN pin is low, the PLL frequency is locked to

the external REFCLK and when high, it is locked to the input serial data. Up to 800µs is required to lock the

frequency.

2. Frequency detector

The frequency detector constantly monitors the offset between the clock obtained by 1/20 frequency-dividing

the recovered clock and the external REFCLK. It outputs high when this offset is less than 1.6%, and low when

this offset is 1.6% or more.

Note on Operation

The following values are recommended for the external resistors and capacitor used as the loop filter.

0.022µF

200Ω

14

15

200Ω

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