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

 
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Installation
The AFBR-2CARxxZ Active Optical Cable package is com-
pliant with the SFF-8432 Improved Pluggable Formfac-
tor housing specification for the SFP+. It can be installed
in any INF-8074 or SFF-8431/2 compliant Small Form
Pluggable (SFP) port regardless of host equipment op-
erating status The AFBR-2CARxxZ is hot-pluggable, al-
lowing both active cable ends to be installed while the
host system is operating and on-line. Upon insertion, the
housing makes initial contact with the host board SFP
cage, mitigating potential damage due to Electro-Static
Discharge (ESD).
Digital Interface and Serial Identification
The two-wire interface protocol and signaling detail are
based on SFF-8431. Conventional EEPROM memory,
bytes 0-255 at memory address 0xA0, is organized in
compliance with SFF-8431. The EEPROM contents of
AFBR-2CARxxZ are such that it can directly replace the
Active Copper Cable.
Transmitter Section
The transmitter section includes an 850 nm VCSEL (Verti-
cal Cavity Surface Emitting Laser) light source designed
and manufactured by Avago Technologies. The VCSEL is
driven by an IC which uses the incoming differential high
speed logic signal to modulate the laser diode driver
current. This Tx laser driver circuit regulates the optical
power at a constant level provided the incoming data
pattern is DC balanced. DC blocking capacitors are lo-
cated inside the AOC package and are not required on
the system board.
Transmit Disable (TX_DISABLE)
Each end of the AFBR-2CARxxZ AOC has a TX_DISABLE
hardware pin, which accepts an input LVTTL compatible
control signal that shuts down the transmitter optical
output. A logic high signal implements the transmitter
disable function, while a low signal allows normal trans-
mitter operation. An internal pull up resistor disables
the transmitter until the host pulls the input low.
Receiver Section
The receiver section includes a PIN photodiode and cus-
tom amplification and quantization IC. DC blocking ca-
pacitors are located inside the AOC package and are not
required on the system board.
Receiver Loss of Signal (Rx_LOS)
The Rx portion of the IC includes detection circuitry
which monitors the average input Rx optical power and
provides a LVTTL/CMOS compatible status signal to the
host via the Rx_LOS pin. A logic high status on this Rx_
LOS output pin indicates a loss of signal, indicating a link
failure such as a broken fiber, or the far-end cable-end is
not plugged in, or the far-end Tx has failed or has been
disabled.
Functional Data I/O
The AFBR-2CARxxZ interfaces with the host circuit board
through the twenty contact SFP+ electrical connector.
See Table 2 for contact descriptions. The device edge
connector is shown in Figure 2.
The AFBR-2CARxxZ high speed transmit and receive in-
terfaces require SFF-8431 compliant signal lines on the
host board. The TX_DISABLE and RX_LOS signals require
LVTTL signals on the host board (per SFF-8431) if used.
If an application does not take advantage of these func-
tions, care must be taken to ground TX_DISABLE to en-
able normal operation.
Part Number
Description
AFBR-2CAR01Z
1 meter SFP+ Active Optical Cable
AFBR-2CAR02Z
2 meter SFP+ Active Optical Cable
AFBR-2CAR03Z
3 meter SFP+ Active Optical Cable
AFBR-2CAR05Z
5 meter SFP+ Active Optical Cable
AFBR-2CAR07Z
7 meter SFP+ Active Optical Cable
AFBR-2CAR10Z
10 meter SFP+ Active Optical Cable
AFBR-2CAR15Z
15 meter SFP+ Active Optical Cable
AFBR-2CAR20Z
20 meter SFP+ Active Optical Cable
AFCT-5016Z
SFP+ Evaluation Board


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