General Features
SFP MSA Compliance
Serial Identification (EEPROM)
The HFCT-5701L/LP is
compliant with the SFP MSA,
which defines the serial
identification protocol. This
protocol uses the 2-wire serial
CMOS E2PROM protocol of the
ATMEL AT24C01A or similar.
MSA compliant, example
contents of the HFCT-5701L/LP
serial ID memory are defined in
Table 3.
The receiver section for the
HFCT-5701L/LP contains an
InGaAs/InP photo detector and
a preamplifier mounted in an
optical subassembly. This optical specifications for mechanical
subassembly is coupled to a post packaging and performance as
amplifier/decision circuit on a
circuit board. The design of the
optical subassembly is such that
it provides better than 12 dB
Optical Return Loss (ORL).
The product package is
compliant with the SFP MSA
with the LC connector option.
The SFP MSA includes
well as dc, ac and control signal
timing and performance.
The power supply is 3.3 V dc.
The High Speed I/O (HSIO)
signal interface is a Low Voltage
Differential type. It is ac coupled
and terminated internally to the
module. The internal
The HFCT-5701L/LP is
complaint to 1 GbE and 1G FC
specifications. This includes
specifications for the signal
coding, optical fiber and
connector types, optical and
electrical transmitter
characteristics, optical and
electrical receiver
characteristics, jitter
Eye Safety
For details of product
compliance, see Table 1.
termination is a 100 Ohm
differential load.
Delatch Mechanism
The delatching mechanism uses
the same design as the MM
HFBR-5701L. The HFCT-5701L/
LP is designed with an MSA
complaint standard delatch as
well as an optional bail wire
delatch. The bail wire delatch
has been slightly modified
outside MSA compliance to
optimize the mechanical
performance of the product.
These modifications do not
interfere with the overall form,
fit and function as specified by
the SFP MSA.
Operating Temperature
The HFCT-5701L/LP has an
operating case temperature of -
10 to +85 °C .
characteristics, and compliance
testing methodology for the
aforementioned.
This transceiver is capable of
implementing both Single Mode
(SM) and Multimode (MM)
optical fiber applications in that
order of precedence in the event
of conflicting specifications. In
addition, the SM link type
exceeds the 2 m to
Power Supply Noise
The HFCT-5701L/LP can
withstand an injection of PSN on
5 km 1000BASE-LX
specification by achieving
compliance over 2 m to 10 km.
The MM link type is expected to
meet the 62.5 µm MMF
specification when used with an
“offset launch” fiber.
the V lines of 100 mV ac
CC
without a degradation in eye
mask margin to 10% on the
transmitter and a
1 dB sensitivity penalty on the
receiver. This occurs when the
product is used in conjunction
with the MSA recommended
power supply filter shown in
Figure 1.
The optical connector is LC
duplex.
1 µH
VCCT
0.1 µF
0.1 µF
1 µH
VCCR
3.3 V
10 µF
0.1 µF
10 µF
SFP MODULE
HOST BOARD
Figure 1 - MSA required power supply filter
2