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AFBR-2CAR01Z Datasheet(PDF) 8 Page - AVAGO TECHNOLOGIES LIMITED

Part No. AFBR-2CAR01Z
Description  10G Ethernet SFP Active Optical Cable (AOC)
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Maker  AVAGO [AVAGO TECHNOLOGIES LIMITED]
Homepage  http://www.avagotech.com
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AFBR-2CAR01Z Datasheet(HTML) 8 Page - AVAGO TECHNOLOGIES LIMITED

 
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Table 7. Two-Wire Interface Electrical Characteristics
Parameter
Symbol
Minimum
Maximum
Unit
Conditions
Host Vcc Range
VccHTWI
3.135
3.465
V
SCL and SDA
VOL
0.0
0.40
V
Rp[1] pulled to VccHTWI,
measured at host side of
connector
VOH
VccHTWI - 0.5
VccHTWI + 0.3
V
SCL and SDA
VIL
-0.3
VccT*0.3
V
VIH
VccT*0.7
VccT + 0.5
V
Input Current on the
SCL and SDA Contacts
Il
-10
10
µA
Capacitance on SCL
and SDA Contacts
Ci[2]
14
pF
Total bus capacitance
for SCL and for SDA
Cb[3]
100
pF
At 400 kHz, 3.0 kΩ Rp, max
At 100 kHz, 8.0 kΩ Rp, max
290
pF
At 400 kHz, 1.1 kΩRp, max
At 100 kHz, 2.75 kΩ Rp, max
Notes:
1. Rp is the pull up resistor. Active bus termination may be used by the host in place of a pullup resistor. Pull ups can be connected to various
power supplies, however the host board design shall ensure that no module contact has voltage exceeding VccT or VccR by 0.5 V nor requires
the module to sink more than 3.0 mA current.
2. Ci is the capacitance looking into the module SCL and SDA contacts
3. Cb is the total bus capacitance on the SCL or SDA bus.
Table 8. Control Functions: Low Speed Signals Timing Characteristics
Parameter
Symbol
Maximum
Units
Notes
Time to Initialize
t_inti
300
ms
Note 1
TX_DISABLE Assert + RX_LOS Assert Time
t_los_on
110
us
Note 2
TX_DISABLE Negate + RX_LOS Deassert Time
t_los_off
2.1
ms
Note 3
Notes:
1. Time from power on or falling edge of TX_DISABLE to when the modulated optical output rises above 90% of nominal (not measurable in the
Active Optical Cable) and the Two-Wire interface is available.
2. The maximum time between (a) when the near-end AOC-end has TX_DISABLE asserted until (b) RX_LOS is declared/asserted on the far-end
AOC-end. There is also a small delay for the signal transit time through the optical cable, however, this is a small effect: light propagating
through fiber ~ 5ns per meter. A 10 ms interval between assertions of TX_DISABLE is required.
3. The maximum time between (a) when the near-end AOC-end has TX_DISABLE negated until (b) RX_LOS is deasserted on the far-end AOC-end.
There is also a small delay for the signal to transit time through the optical cable, however, this is a small effect: light propagating through fiber
~ 5 ns per meter


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