VSC7967 transport physical layer vppd-01356 revision 1.0 VSC7967 gpon onu module VSC7967 burst-mode laser driver connector triplexor microcontroller spi fault and control logic adc analog mux vsc7970 at 1490 nm laser at 1310 nm analog video receive at 1555 nm catv receive video amplifier downstream video at 1555 nm downstream receive data at 1490 nm upstream data at 1310 nm limiting amplifier mon_sel features: applications: application diagram: benefits: f apc loop requires no initialization phase f VSC7967 meets the specification for bpon, ge-pon, and gpon f burst enable input supports lvpecl, lvds, and lvttl output levels f selectable resistance on monitor diode input f laser driver crossing point control f built-in eye safety support f laser driver is ready to transmit upon power up f allows the VSC7967 to be used in both pon and sfp module solutions f allows pon module to interoperate with multiple upstream devices f improves accuracy of the monitor diode input by allowing the user to select the resistance and capacitance in the input f enables the user to adjust the level of the crossing point on the laser driver output f no external components are required to meet iec-60825 eye safety specifications f bpon, ge-pon, and gpon burst-mode laser driver specifications: f package size: 5 mm x 5 mm qfn f maximum modulation = 80 ma f typical core power = 330 mw f operating temperature range = -40 c to 100 c pon integrated 155 mbps to 2.5 gbps burst-mode laser driver and limiting amplifier
trademarks tm vitesse, asic-friendly, fibretimer, timestream, snoop loop, super fec, focusconnect, meigs-ii, meigs-iie, lansing, campbell-i, barrington, pacemaker, hovcat48, hovcat48e, hovcat192, hovcat192e, micro phy, focus32, focus16, iq2200, nexsas, versacat, gigastream, hawx, sparx, stax, vstax, simpliphy,veriphy, actiphy, xfp pro, sfp pro, smart-link, octalmac, eq technology are trademarks in the uni ted states and/or other jurisdictions of vitesse semiconductor corporation. all other trademarks or registered trademarks mentioned herein are t he property of their respective holders. vitesse semiconductor corporation (?vitesse?) retains the right to make changes to its products or specifications to improve pe rformance, reliability or manufacturability. all information in this document, including descriptions of features, functions, performance, technical spec ifications and availability, is subject to change without notice at any time. while the information furnished herein is held to be accurate and reliable, no re sponsibility will be assumed by vitesse for its use. furthermore, the information contained herein does not convey to the purchaser of microelectronic devices any license under the patent right of any manufacturer. copyright ? 2006 741 calle plano camarillo, ca 93012, usa tel: +1 805.388.3700 fax: +1 805.987.5896 www.vitesse.com sales@vitesse.com VSC7967 VSC7967 laser driver data modulation and bias control and montoring datan out outn 5 ? 15 ? bsrc = v cc v cc i mod i mod ben 15 ? benn_tx_dis v cc 15 ? 5 ? bsnk aout 10 k ? md tx_fault i bias bsnkn i md 10 k ? v cc limiting amplifier lin s1 lout 50 ? loutn s5 dcrst2 peak detector and control 50 ? los 100 ? s2 s4 s3 dcrst1 rpk_stage dcrst[1:0] dcrst[1:0] la_sqmon losmon output control la_sqsrc la_sqforce 7 k ? v cc general description: block diagrams: pon integrated burst-mode laser driver and limiting amplifier the VSC7967 is a multirate 1.25 gbps integrated laser driver and 2.5 gbps limiting amplifier for passive optical network applications optimized to reduce module cost. the device is intended to drive distributed feedback (dfb) and fabry perot (fp) lasers. a standard spi port is provided for programming integrated digital-to-analog converters for laser bias current, modulation current, average power, and the limiting amplifier loss of signal threshold. the VSC7967 is equipped with sfp-compliant fault indicators, redundant disable control, automatic power control, temperature sensor, various signal monitors, and robust eye safety features. the VSC7967 is available in a 5mm x 5mm 32-pin qfn plastic package.
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