AFCT-5750ATPZ Avago Technologies US Inc., AFCT-5750ATPZ Datasheet - Page 4

• Manufacturer Part Number: AFCT-5750ATPZ
• Description: OC12 IR SFP PULL DELATCH EXTP RoHS
• Manufacturer: Avago Technologies US Inc.
• Series: METRAKr

Specifications of AFCT-5750ATPZ

• Data Rate: 622Mbps
• Wavelength: 1300nm
• Applications: General Purpose
• Voltage - Supply: 3.1 V ~ 3.5 V
• Connector Type: LC Duplex
• Mounting Type: SFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Receiver Section
The receiver section for the AFCT-575xZ contains an
InGaAs/InP photo detector and a preamplifier mounted
in an optical subassembly. This optical subassembly is
coupled to a post amplifier/decision circuit on a circuit
board. The design of the optical subassembly provides
better than 12 dB Optical Return Loss (ORL).
Connection to the receiver is provided via a LC optical
connector.
RX_LOS
The receiver section contains a loss of signal (RX_LOS)
circuit to indicate when the optical input signal power
is insufficient for SONET/SDH compliance. A high signal
indicates loss of modulated signal, indicating link failure
such as a broken fiber or a failed transmitter. RX_LOS can
be also be monitored via the two-wire serial (address A2,
byte 110, bit 1).
Functional Data I/O
Avago’s AFCT-575xZ transceiver is designed to accept
industry standard differential signals. The transceiver pro-
vides an AC-coupled, internally terminated data interface.
Bias resistors and coupling capacitors have been included
within the module to reduce the number of components
required on the customer’s board. Figure 2 illustrates the
recommended interface circuit.
Digital Diagnostic Interface and Serial Identification
The AFCT-575xZ family complies with the SFF-8074i spec-
ification, which defines the module’s serial identification
protocol to use the 2-wire serial CMOS EEPROM protocol
of the ATMEL AT24C01A or similar. Standard SFP EEPROM
bytes 0-255 are addressed per SFF-8074i at memory ad-
dress 0xA0 (A0h).
As an enhancement to the conventional SFP interface
defined in SFF-8074i, the AFCT-5755Z is also compliant
to SFF-8472 (the digital diagnostic interface for SFP). This
enhancement adds digital diagnostic monitoring to stan-
dard SFP functionality, enabling failure prediction, fault
isolation, and component monitoring capabilities.
Figure 3. MSA required power supply filter
4
SFP MODULE
V
V
CC
CC
T
R
0.1 µF
0.1 µF
HOST BOARD
10 µF
1 µH
1 µH
0.1 µF
10 µF
3.3 V
Using the 2-wire serial interface, the AFCT-5755Z provides
real time access to transceiver internal supply voltage and
temperature, transmitter output power, laser bias current
and receiver average input power, allowing a host to pre-
dict system compliance issues. These five parameters are
internally calibrated, per the MSA. New digital diagnostic
information is accessed per SFF-8472 using EEPROM
bytes 0-255 at memory address 0xA2 (A2h).
The digital diagnostic interface also adds the ability to
disable the transmitter (TX_DISABLE), monitor for Trans-
mitter Faults (TX_FAULT) and monitor for Receiver Loss
of Signal (RX_LOS).
Contents of the MSA-compliant serial ID memory are
shown in Tables 3 to 7. The SFF-8074i and SFF-8472
specifications are available from the SFF Committee at
http://www.sffcommittee.org.
Predictive Failure Identification
The diagnostic information allows the host system to
identify potential link problems. Once identified, a fail-
over technique can be used to isolate and replace suspect
devices before system uptime is impacted.
Compliance Prediction
The real-time diagnostic parameters can be monitored to
alert the system when operating limits are exceeded and
compliance cannot be ensured.
Fault Isolation
The diagnostic information can allow the host to pinpoint
the location of a link problem and accelerate system ser-
vicing and minimize downtime.
Component Monitoring
As part of the host system monitoring, the real time di-
agnostic information can be combined with system level
monitoring to ensure system reliability.
Application Support
An Evaluation Kit and Reference Designs are available to
assist in evaluation of the AFCT-575xZ SFPs. Please contact
your local Field Sales representative for availability and
ordering details.