SFP timing parameters for SFP management

 

Parameter

 

Symbol

Min.

 

Max.

 

Unit

 

Note

 

 

TX_DISABLE Assert time

t_off

 

10

 

µsec

1

 

 

TX_DISABLE Negate time

 

t_on

 

 

1

 

msec

 

2

 

 

Time to initialize, including

t_init

 

300

 

msec

3

 

 

reset of TX_FAULT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TX Fault Assert Time

 

t_fault

 

 

100

 

µsec

 

4

 

 

TX_DISABLE to reset

t_rest

10

 

 

 

µsec

5

 

 

LOS Assert Time

 

t_loss_on

 

 

100

 

µsec

 

6

 

 

LOS Deassert Time

t_loss_off

 

100

 

µsec

7

 

 

Serial ID Clock Rate

 

f_serial_clock

 

 

100

 

kHz

 

 

 

Notes:

1)Time from rising edge of TX_DISABLE to when the optical output falls below 10% of nominal.

2)Time from falling edge of TX_DISABLE to when the modulated optical output rises above 90% of nominal.

3)From power on or negation of TX_Fault using TX Disable.

4)Time from fault to TX fault on.

5)Time TX Disable must be held high to reset TX_Fault.

6)Time from LOS state to Rx LOS assert.

7)Time from non-LOS state to Rx LOS deassert.

8

2008/3/18

 

Rev. 0A

DELTA ELECTRONICS, INC.

www.deltaww.com

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Delta Electronics LCP-4250A4CDR manual SFP timing parameters for SFP management, Parameter Symbol Min Max Unit