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V23848-M305-C56
iSFP-Intelligent Small Form-factor Pluggable 1.25 Gigabit Ethernet 2.125/1.0625 Gbit/s Fibre Channel Multimode 850 nm Transceiver with LC Connector
iSFP™ - Intelligent Small Form-factor Pluggable
1.25 Gigabit Ethernet (1000 Base-SX)
2.125/1.0625 Gbit/s Fibre Channel (200-M5/M6-SN-I / 100-M5/M6-SN-I)
Multimode 850 nm Transceiver with LC™ Connector
Fiber Optics
V23848-M305-C56
FeaturesSmall Form-factor Pluggable (SFP) MSA compatible
transceiver1)Fully SFF-8472 compatibleIncorporating Intelligent – Digital Diagnostic
Monitoring InterfaceInternal calibration implementationAdvanced release mechanismEasy access, even in belly to belly applicationsWire handle release for simplicityColor coded black tab (multimode)PCI height compatibleExcellent EMI performanceCommon ground conceptRJ-45 style LC™ connector systemSingle power supply (3.3 V)Extremely low power consumption of 530 mW typicalSmall size for high channel densityUL-94 V-0 certifiedESD Class 1C per JESD22-A114-B (MIL-STD 883D Method 3015.7)According to FCC (Class B) and EN 55022For distances of up to 860 m (50 µm fiber)Laser safety according to Class 1 FDA and IECAC/AC Coupling according to MSAExtended operating temperature range of –20°C to 85°CSFP/iSFP™ evaluation kit V23848-S5-V4 available upon requestA press fit cage and cage plugs are available as accessory products from Infineon
(see SFP Accessories)MSA documentation can be found at www.infineon.com/fiberoptics under Transceivers, SFP Transceivers.
Pin Configuration
Figure1iSFP™ Transceiver Electrical Pad LayoutPin DescriptionCommon transmitter and receiver ground within the module.A high signal indicates a laser fault of some kind and that laser is switched off.A low signal switches the transmitter on. A high signal or when not connected switches the transmitter off.MOD-DEF(2) is the data line of two wire serial interface for serial ID.MOD-DEF(1) is the clock line of two wire serial interface for serial ID.MOD-DEF(0) is grounded by the module to indicate that the module is present.A low signal indicates normal operation, light is present at receiver input. A high signal indicates the received
optical power is below the worst case receiver sensitivity.Should be pulled up on host board to VCC by 4.7 - 10 kΩ.AC coupled inside the transceiver. Must be terminated with 100 Ω differential at the user SERDES.
10)AC coupled and 100 Ω differential termination inside the transceiver.
DescriptionThe Infineon Fibre Channel / Gigabit Ethernet multimode transceiver – part of Infineon
iSFP™ family – is compatible to the Physical Medium Depend (PMD) sublayer and
baseband medium, type 1000 Base-SX (short wavelength) as specified in IEEE Std
802.3 and Fibre Channel
FC-PI-2 (Rev.5.0) 200-M5-SN-I, 200-M6-SN-I for 2.125 Gbit/s, and
FC-PI-2 (Rev.5.0) 100-M5-SN-I, 100-M6-SN-I for 1.0625 Gbit/s.
The appropriate fiber optic cable is 62.5 µm or 50 µm multimode fiber with LC™
connector.
Link Length as Defined by IEEE and Fibre Channel StandardsMinimum reach as defined by IEEE and Fibre Channel Standards. A 0 m link length (loop-back connector) is
supported.Maximum reach as defined by IEEE and Fibre Channel Standards. Longer reach possible depending upon link
implementation.
at 1.0625 Gbit/s
at 1.25 Gbit/s
at 2.125 Gbit/s
The Infineon iSFP™ multimode transceiver is a single unit comprised of a transmitter, a
receiver, and an LC™ receptacle.
This transceiver supports the LC™ connectorization concept. It is compatible with RJ-45
style backpanels for high end datacom and telecom applications while providing the
advantages of fiber optic technology.
The module is designed for low cost SAN, LAN, Fibre Channel and Gigabit Ethernet
applications. It can be used as the network end device interface in mainframes,
workstations, servers, and storage devices, and in a broad range of network devices
such as bridges, routers, hubs, and local and wide area switches.
This transceiver operates at 1.0625 Gbit/s / 1.25 Gbit/s / 2.125 Gbit/s from a single power
supply (+3.3 V). The 100 Ω differential data inputs and outputs are LVPECL and CML
compatible.
Functional Description of iSFP™ TransceiverThis transceiver is designed to transmit serial data via multimode cable.
Figure2Functional Diagram
The receiver component converts the optical serial data into CML compatible electrical
data (RD+ and RD–). The Loss Of Signal (LOS) shows whether an optical signal is
present.
The transmitter converts CML compatible electrical serial data (TD+ and TD–) into
optical serial data. Data lines are differentially 100 Ω terminated.
The transmitter contains a laser driver circuit that drives the modulation and bias current
of the laser diode. The currents are controlled by a power control circuit to guarantee
constant output power of the laser over temperature and aging. The power control uses
the output of the monitor PIN diode (mechanically built into the laser coupling unit) as a
controlling signal, to prevent the laser power from exceeding the operating limits.
Single fault condition is ensured by means of an integrated automatic shutdown circuit
that disables the laser when it detects laser fault to guarantee the laser Eye Safety.
The transceiver contains a supervisory circuit to control the power supply. This circuit
makes an internal reset signal whenever the supply voltage drops below the reset
threshold. It keeps the reset signal active for at least 140 milliseconds after the voltage
has risen above the reset threshold. During this time the laser is inactive.
A low signal on TxDis enables transmitter. If TxDis is high or not connected the
transmitter is disabled.
An enhanced Digital Diagnostic Monitoring Interface (Intelligent) has been incorporated
into the Infineon Small Form-factor Pluggable (SFP) transceiver. This allows real time
access to transceiver operating parameters, based on the SFF-8472.
This transceiver features Internal Calibration. Measurements are calibrated over
operating temperature and voltage and must be interpreted as defined in SFF-8472.
The transceiver generates this diagnostic data by digitization of internal analog signals
monitored by a new diagnostic Integrated Circuit (IC).
This diagnostic IC has inbuilt sensors to include alarm and warning thresholds. These
threshold values are set during device manufacture and therefore allow the user to
determine when a particular value is outside of its operating range.
Alarm and Warning Flags are given. Alarm Flags indicate conditions likely to be
associated with an inoperational link and cause for immediate action. Warning Flags
indicate conditions outside the normally guaranteed bounds but not necessarily causes
of immediate link failures.
These enhanced features are in addition to the existing SFP features provided by the
manufacturer i.e. serial number and other vendor specific data.
The serial ID interface defines a 256 byte memory map in EEPROM, accessible over a
2 wire, serial interface at the 8 bit address 1010000X (A0h).
The Digital Diagnostic Monitoring Interface makes use of the 8 bit address 1010001X
(A2h), so the originally defined serial ID memory map remains unchanged and is
Digital Diagnostic Monitoring Parameters
Regulatory Compliance (EMI)Any kind of modification not expressly approved by Infineon Technologies may affect the regulatory
compliance of the concerned product. As a consequence thereof this could void the user’s authority to operate
the equipment.
Technical DataExceeding any one of these values may permanently destroy the device.
Absolute Maximum RatingsOperating case temperature measured at transceiver reference point (in cage through 2nd centre hole from
rear, see Figure
9).
Electrical Characteristics (VCC = 2.97 V to 3.63 V, TC = –20°C to 85°C)
Common
Transmitter
ReceiverMeasured with MSA recommended supply filter network (Figure7). Maximum value above that of the steady
state value.Internally AC coupled. Typical 100 Ω differential input impedance.
Internally AC coupled. Load 50Ω to GND or 100Ω differential. For dynamic measurement a tolerance ofmV should be added.Fibre Channel PI Standard.Measured values are 20% - 80%.Deterministic Jitter is that jitter measured by a bathtub scan, using a 27–1 NRZ PRBS, and extrapolating to1BER.Total Jitter is that jitter measured by a bathtub scan, using a 27–1 NRZ PRBS, and extrapolating to 1x10–12 BER.
Receiver total jitter complies with Fibre Channel jitter output budget for OMAs from the stressed receiver
sensitivity limit up to at least 700 µW. Error-free operation at the center of the eye is achieved for OMAs up to
at least 1000 µW.Jitter (pk-pk) is measured using a 27–1 NRZ PRBS and a Digital Communications Analyzer.
10)Measured using a 20 Hz to 1 MHz sinusoidal modulation with the MSA recommended power supply filter
network (Figure7) in place. A change in sensitivity of less than 1 dB can be typically expected.
11)Supply current excluding Rx output load.
Optical Characteristics (VCC = 2.97 V to 3.63 V, TC = –20°C to 85°C)
Transmitter
Receiver7)
Fibre Channel PI Standard. Typical OMA values based on –6dBm launched power (average) and 15dBextinction ratio.Into multimode fiber, 62.5 µm or 50 µm diameter.Deterministic Jitter is that jitter measured by a bathtub scan, using a 27–1 NRZ PRBS, and extrapolating to
1BER.Total Jitter is that jitter measured by a bathtub scan, using a 27–1 NRZ PRBS, and extrapolating to 1x10–12 BER.Jitter (pk-pk) is measured using a 27–1 NRZ PRBS and a Digital Communications Analyzer.Values are 20% - 80%. Measured at nominal data rate, unfiltered, using an O/E plug-in with a bandwidth of
2.85 GHz or higher. Complies with FC 1x, FC 2x and Gigabit Ethernet eye mask when filtered.Receiver characteristics are measured with a worst case reference laser.Fibre Channel PI Standard.Average optical power at which the BER is 1x10–12. Measured with a 27–1 NRZ PRBS and ER = 9 dB.
10)Measured at the given Stressed Receiver Eye Closure Penalty and DCD component given in Fibre Channel
PI Standard (2.03/2.18 dB & 40/80 ps).
11)Measured with a transmit signal having a 9 dB extinction ratio.
12)See Figure3.
Optical Characteristics (VCC = 2.97 V to 3.63 V, TC = –20°C to 85°C) (cont’d)
Figure3
Timing of Control and Status I/O
