PDF IBM42F12SNNAA20 Data sheet ( Hoja de datos )

Número de pieza	IBM42F12SNNAA20
Descripción	(IBM42F10SNNAA20 / IBM42F12SNNAA20) Small Form Factor Transceiver
Fabricantes	IBM Microelectronics
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No Preview Available ! www.DataSheet4U.com IBM42F10SNNAA20 IBM42F12SNNAA20 1063/1250MBd Small Form Factor Transceiver with Signal Detect Features • International Class 1 laser safety certiﬁed • 1063Mb/s to 1250Mb/s data rates • (ANSI) Fibre Channel compliant [1] • (IEEE 802.3z/d2) Gigabit Ethernet compliant [2] • Short wavelength (SW) (distance ≤ 550m) • Gigabit electrical serial interface • Serial electrical ⇔ light conversion • UL & CSA approved • LVTTL Signal-Detect Output • Single +3.3V Power Supply • Low bit error rate (< 10-12) • High reliability - AFR < 0.01 %/khr @50 C Applications • Gigabit Fibre Channel • Gigabit Ethernet • Client/Server environments • Distributed multi-processing • Fault tolerant applications • Visualization, real-time video, collaboration • Channel extenders, data storage, archiving • Data acquisition Description The 1063 / 1250 Mb/s Serial Optical Converter (SFF-1063/1250N-SW) is an integrated fiber optic transceiver that provides a high-speed serial link at a signaling rate of 1062.5 to 1250 Mb/s. The SFF- 1063/1250N-SW conforms to the American National Standards Institute’s (ANSI) Fibre Channel, FC-0 specification for short wavelength operation (100- M5-SN-I and 100-M6-SN-I). It also conforms to draft 2 of the IEEE 802.3z, 1000Base-SX standard [2]. The SFF-1063/1250N-SW is ideally suited for Fibre Channel Arbitrated Loop (FC-AL) and Gigabit Ether- net applications, but can be used for other serial applications where high data rates are required. This specification applies to a pin through hole (PTH) module which has a 2 by 5 electrical connec- tor pin configuration. The SFF-1063/1250N-SW uses a short wavelength (850nm) VCSEL (Vertical Cavity Surface Emitter Laser) source. This enables low cost data transmis- sion over optical fibers at distances up to 550m. A 50/125µm multimode optical fiber, terminated with an industry standard LC connector, is the preferred medium. (A 62.5/125µm multimode fiber can be substituted with shorter maximum link distances.) Encoded (8B/10B) [3], [4], gigabit/sec, serial, differ- ential, PECL signals traverse a connector interfac- ing the SFF-1063/1250N-SW to the host card. The serial data modulates the laser and is sent out over the outgoing fiber of a duplex cable. Incoming, modulated light is detected by a photore- ceiver mounted in the LC receptacle. The optical signal is converted to an electrical one, amplified and delivered to the host card. This module is designed to work with industry standard “10b” Seri- alizer/Deserializer modules. The SFF-1063/1250N-SW is a Class 1 laser safe product. The optical power levels, under normal operation, are at eye safe levels. Optical fiber cables can be connected and disconnected without shut- ting off the laser transmitter. SFF.02 1/24/00 Page 1 of 16 1 page www.DataSheet4U.com IBM42F10SNNAA20 IBM42F12SNNAA20 1063/1250MBd Small Form Factor Transceiver with Signal Detect Operation Initialization Timings SFF-1063/1250N-SW with Tx_Disable De-asserted SFF-1063/1250N-SW with Tx_Disable Asserted Vcc > 3.15V 1 Tx_Disable 0 Vcc > 3.15V Tx_Disable Optical Transmit Signal t_init < 300ms Optical Transmit Signal t_init < 300ms Resetting a Laser Fault Resetting a laser fault by toggling the Tx_Disable input will permit the SFF-1063/1250N-SW to attempt to power on the laser following a fault condition. Continuous resetting and repowering of the laser under a hard fault condition could cause a series of optical pulses with sufficient energy to violate laser safety standards. Fault Condition Recovery Timings To alleviate this possibility, the SFF-1063/1250N- SW will turn off the laser if a second fault is detected within 25ms of the laser powering on. This lock is cleared during each power on cycle. Please refer to the timing diagrams below. Successful Recovery from a Transmitter Safety Fault Occurrence of transmitter safety fault Unsuccessful Recovery from a Transmitter Safety Fault Occurrence of transmitter safety fault Tx_Disable Optical Power t_reset >10µs only if the fault is transient t_init <300ms Tx_Disable Optical Power t_reset >10µs only if the fault is transient t_fault <100µs t_init <300ms SFF.02 1/24/00 Page 5 of 16 5 Page www.DataSheet4U.com IBM42F10SNNAA20 IBM42F12SNNAA20 1063/1250MBd Small Form Factor Transceiver with Signal Detect Transmitter Speciﬁcations Symbol λC ∆λ PT Trise/Tfall RIN12 DJ CPR Parameter Spectral Center Wavelength Spectral Width Launched Optical Power Optical Rise/Fall Time Optical Extinction Ratio Relative Intensity Noise Eye Opening Deterministic Jitter Coupled Power Ratio Min Typical Max. Unit Notes 830 860 nm 0.85 nm(rms) -9.5 -4.0 dBm(avg) 1 0.26 ns 2 9 dB 3 -117 dB/Hz 4 0.57 UI 5 0.20 UI 6 9 dB 7 1. Launched optical power is measured at the end of a two meter section of a 50/125m fiber (N.A.=0.20). The maximum and mini- mum of the allowed range of average transmitter power coupled into the fiber are worst case values to account for manufacturing variances, drift due to temperature variations, and aging effects. 2. Optical rise time is determined by measuring the 20-80% of average maximum values using an oscilloscope and 4th order Bessel Thompson ﬁlter having a 3dB bandwidth of 796MHz and then correcting the measurement to the full bandwidth value. Optical fall times are measured using a 6GHz photodetector followed by a 22GHz sampling oscilloscope. No corrections due to ﬁltering or sys- tem bandwidth limitations are made on the measured value. 3. Extinction Ratio is the ratio of the average optical power (in dB) in a logic level one to the average optical power in a logic level zero measured under fully modulated conditions in the presence of worst case reﬂections. 4. RIN12 is the laser noise, integrated over a speciﬁed bandwidth, measured relative to average optical power with 12dB return loss. See ANSI Fibre Channel Speciﬁcation Annex A.5. 5. Eye opening is the portion of the bit time where the bit error rate (BER) ≤ 10-12. The general laser transmitter pulse shape charac- teristics are speciﬁed in the form of a mask of the transmitter eye diagram. These characteristics include pulse overshoot, pulse undershoot, and ringing, all of which should be controlled to prevent excessive degradation of the receiver sensitivity. For the pur- pose of an assessment of the transmit signal, it is important to consider not only the eye opening, but also the overshoot and undershoot limitations. 6. Deterministic Jitter is measured as the peak-to-peak timing variation of the 50% optical signal crossings when transmitting repeti- tive K28.5 characters. It is deﬁned in FC-PH, version 4.3, clause 3.1.87 as: Timing distortions caused by normal circuit effects in the transmission system. Deterministic jitter is often subdivided into duty cycle distortion (DCD) caused by propagation differences between the two transitions of a signal and data depen- dent jitter (DDJ) caused by the interaction of the limited bandwidth of the transmission system components and the sym- bol sequence. 7. Coupled Power Ratio is the ratio of the average power coupled into a multimode ﬁber to the average power coupled into a single mode ﬁber. This measurement is deﬁned in EIA/TIA-526-14A. SFF.02 1/24/00 Page 11 of 16 11 Page

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