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參數(shù)資料
| 型號(hào)： | TR117FA-0D30S |
| 英文描述： | Optoelectronic |
| 中文描述： | 光電 |
| 文件頁(yè)數(shù)： | 8/14頁(yè) |
| 文件大小： | 207K |
| 代理商： | TR117FA-0D30S |
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8
Timing requirements of control and status I/O
Parameter
Symbol
Min
Max
Unit
Conditions
Tx Disable
assert time
t
off
10
μs
Timing from rising edge of Tx Disable to
when the optical output falls below 10%
of nominal
Timing from falling edge of Tx Disable to
when the modulated optical output rises
above 90% of nominal
Tx Disable
Negate time
t
on
1
ms
Time to initialize
Includes reset of
Tx Fault
Tx Fault
Assert time
Tx Disable to
Reset
t
init
300
ms
From power on or negation of Tx Fault
using Tx Disable
t
fault
100
μs
Time from fault to Tx Fault on
t
reset
10
μs
Time Tx Disable must be held high to
reset Tx Fault
Los Assert time
t
loss-on
100
μs
Time from LOS state to Rx Los assert
Los
Deassert time
t
loss-off
1000
μs
Time from non-LOS state to Rx Los
deassert
Timing from rising or falling edge of rate
select input until receiver bandwidth is in
conformance with appropriate
specification
Rate select
Change time
t
ratesel
100
μs
Serial ID clock rate
F
s-clock
100
kHz
SFP transceiver power on initialization procedure, TX_DISABLE negated.
During power on of the SFP transceiver, TX_FAULT may be asserted (High) as soon
as power supply voltages are within specification. For transceiver initialization with
TX_DISABLE negated, TX_FAULT shall be negated when the transmitter safety
circuitry has detected that the transmitter is operating in its normal state. If a
transmitter fault has not occurred, TX_FAULT shall be negated within a period t_init
from the time that VCCT exceeds the specified minimum operating voltage. If
TX_FAULT remains asserted beyond the period t_init, the host may assume that a
transmission fault has been detected by the transceiver. The power on initialization
timing for a transceiver with TX_DISABLE negated is shown in Figure 3.
Figure 3. Power on initialization of SFP transceivers, Tx Disable negated
SFP transceiver power on initialization procedure, TX_DISABLE asserted.
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