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SFP Laser Controller and
Diagnostic IC
AC ELECTRICAL CHARACTERISTICS (continued)
(V CC = 2.97V to 5.5V, T A = -40°C to +95°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
TIMING FOR SOFT CONTROL AND STATUS FUNCTIONS
TX-D Assert Time
TX-D Deassert time
Time to Initialize, Including
Reset of TX-F
TX-F Assert Time
RX-LOS Assert Time
RX-LOS Deassert Time
Rate-Select Change Time
t OFF
t ON
t INIT
t FAULT
t LOS_ON
t LOS_OFF
t RATE_SEL
Time from TX-D set until DACs fall below
10% of nominal (Notes 13, 17)
Time from TX-D cleared until DACs rise
above 90% of nominal (Notes 13, 17)
Time from power-on or negation of TX-F
using TX-D;
serial communication possible
Time from fault to TX-F set (Note 17)
Time from occurrence of loss of signal to
RX-LOS set
Time from occurrence of presence of signal
to RX-LOS cleared
Time from change of state of rate-select bit
to rate-select output (RSELOUT) pin change
10
50
200
50
50
50
50
ms
ms
ms
ms
ms
ms
ms
I 2 C AC ELECTRICAL CHARACTERISTICS
(V CC = 2.97V to 5.5V; T A = -40°C to +95°C, timing referenced to V IL(MAX) and V IH(MIN) .) (See Figure 19)
PARAMETER
SCL Clock Frequency
SYMBOL
f SCL
(Note 14)
CONDITIONS
MIN
0
TYP
MAX
400
UNITS
kHz
Bus Free Time Between Stop and
Start Conditions
Hold Time (Repeated) Start
Condition
Low Period of SCL
High Period of SCL
t BUF
t HD:STA
t LOW
t HIGH
1.3
0.6
1.3
0.6
μs
μs
μs
μs
Data Hold Time
Data Setup Time
Start Setup Time
t HD:DAT
t SU:DAT
t SU:STA
0
100
0.6
0.9
μs
ns
μs
SDA and SCL Rise Time
SDA and SCL Fall Time
Stop Setup Time
SDA and SCL Capacitive
Loading
EEPROM Write Time
t R
t F
t SU:STO
C B
t W
(Note 15)
(Note 15)
(Note 15)
(Note 16)
20 +
0.1C B
20 +
0.1C B
0.6
10
300
300
400
20
ns
ns
μs
pF
ms
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