UQ9-06-010

Ed:1.4

Date:02.Nov.2006

Page 8 of 14

MITSUBISHI (OPTICAL DEVICES)

MF-27WXE Series

100Mbps-2.7Gbps, Multi-Rate DWDM SFP TRANSCEIVER MODULE

Table 1

Timing of control and status I/O

The timing of the control and status line are listed in below and Figure 1 to 7.

Parameter

Symbol

Min

Max

Unit

Condition

TX_DISABLE Assert

Time

t_off

-

10

μs

Time from rising edge of TX_DISABLE to

when the optical output falls below 10% of

nominal

TX_DISABLE Negate

Time

t_on

-

1

ms

Time from falling edge of TX_DISABLE to

when the modulated optical output rises

above 90% of nominal

Time to Initialize,

Including Reset of

TX_FAULT

t_init

-

300

ms

From power on or negation of TX_FAULT

using TX_DISABLE

TX_FAULT Assert

Time

T_fault

-

100

μs

Time from fault to TX_FAULT on

TX_DISABLE to Reset

T_reset

10

-

μs

Time TX_DISABLE must be held high to

reset TX_FAULT

RX_LOS Assert Time

t_losson

-

100

μs

Time from LOS state to RX_LOS Assert

RX_LOS Negate Time

t_lossoff

-

100

μs

Time from non-LOS state to RX_LOS

de-assert

Serial ID Clock Rate

f_clock

-

100

kHz

-

Figure 1

Power on initialization of SFP transceiver, TX_DISABLE negated

Figure 2

Power on initialization of SFP transceiver, TX_DISABLE asserted

Figure 3

SFP TX_DISABLE timing during normal operation