General Features
1000BASE-LX Compliance:
Serial Identification (EEPROM)
The HFCT-5710L/LP is
SFP MSA Compliance:
compliant with the SFP MSA,
which defines the serial
The product package is
The HFCT-5710L/LP is
compliant with the SFP MSA
with the LC connector option.
The SFP MSA includes
specifications for mechanical
packaging and performance as
well as dc, ac and control signal
timing and performance.
compliant with the IEEE 802.3Z
(2000 Edition) Physical Medium
Dependent (PMD) sublayer and
baseband medium, type
1000BASE-LX (Long Wavelength
Laser) description. This includes
specifications for the signal
coding, optical fiber and
connector types, optical and
electrical transmitter
characteristics, optical and
electrical receiver
characteristics, jitter
characteristics, and compliance
testing methodology for the
aforementioned.
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-5710L/LP
serial ID memory are defined in
Table 9.
The power supply is 3.3 V dc.
Eye Safety
For details of product
compliance, see Table 1.
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
De-latch Mechanism
The de-latching mechanism uses
the same design as the MM
HFBR-5710L. The HFCT-5710L/
LP is designed with an MSA
compliant standard de-latch and
an optional de-latch for Belly-to-
Belly operation. The optional
de-latch has been slightly
termination is a 100 Ohm
differential load.
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
Operating Temperature
The HFCT-5710L/LP has an
operating case temperature of
-10 to +85°C.
modified outside of MSA
compliance to optimize the
mechanical performance of the
product. These modifications do
not interfere with the overall
form, fit and function as
exceeds the 2 m to 5 km
1000BASE-LX specification by
achieving compliance over 2 m to
10 km. The MM link type meets
the 50 µm and 62.5 µm MMF
specification when used with an
“offset launch” fiber.
specified by the SFP MSA.
Power Supply Noise
The HFCT-5710L/LP can
withstand an injection of PSN on
The optical connector is LC
duplex.
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.
There is no governing
environmental specification in
IEEE 802.3Z therefore the
environmental specifications
contained in this product
definition take precedence.
Compliance over all operating
conditions defined in this
document is implied except
where specifically noted.
1 µH
1 µH
VCC
T
0.1 µF
0.1 µF
VCC
R
3.3 V
10 µF
0.1 µF
10 µF
SFP MODULE
HOST BOARD
Figure 1 - MSA required power supply filter
2