SFP timing parameters for SFP management

Parameter

Symbol

Min.

Max.

Unit

Unit Conditions

TX_DISABLE Assert

t_off

 

10

 

Time from rising edge of TX_DISABLE to

 

μsec

when the optical output falls below 10% of

time

 

 

 

 

 

nominal

 

 

 

 

 

TX_DISABLE

t_on

 

1

msec

Time from falling edge of TX_DISABLE to

 

when the modulated optical output rises

Negate time

 

 

 

 

 

above 90% of nominal

 

 

 

 

 

Time to initialize,

 

 

 

 

From power on or negation of TX_Fault using

including reset of

t_init

 

300

msec

TX_FAULT

 

 

 

 

TX Disable.

 

 

 

 

 

TX Fault Assert

t_fault

 

100

μsec

Time from fault to TX fault on.

Time

 

 

 

 

 

 

 

TX_DISABLE to

t_rest

10

 

μsec

Time TX Disable must be held high to reset

reset

 

TX_Fault

LOS Assert Time

t_loss_on

 

100

μsec

Time from LOS state to Rx LOS assert

LOS Deassert Time

t_loss_off

 

100

μsec

Time from non-LOS state to Rx LOS deassert

Serial ID Clock Rate

f_serial_clock

 

100

kHz

 

8

Jan., 2008

 

Rev. 0D

DELTA ELECTRONICS, INC.

www.deltaww.com

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Image 8
Delta Electronics LCP-155B4JSRx manual SFP timing parameters for SFP management, Txdisable, Txfault