Sfp timing parameters for sfp management – Delta Electronics Multi-Rate CWDM SFP Transceiver LCP-1250 CWDM User Manual
Page 7
DELTA ELECTRONICS, INC.
7 2008/1/15
Rev. 0A
www.deltaww.com
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
reset of TX_FAULT
t_init
300
msec
3
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.