PHY2078：125Mbps to 2.5Gbps FTTx Burst-Mode Laser Driver/Postamplifier

Programmable GPON Transceiver

The PHY2078 is a combined burst-mode laser driver and limiting amplifier for use within fiber optic modules for FTTx applications. Used with the PHY1095 or PHY1097 transimpedance amplifiers and a low cost serial EEPROM, the device forms a complete PON diplexer silicon solution. The transmit block includes a high-frequency modulator and a bias current generator. The bias current can be controlled either by a fast-settling APC loop or in open-loop mode, which uses a temperature lookup table. The receiver includes a limiting amplifier with programmable bandwidth. A signal-detect/loss-of-signal (LOS) function is implemented using the input signal modulation amplitude with user-selectable threshold and hysteresis. Operating with a 3.3V supply and rated from -40°C to +95°C ambient operating temperature range, the PHY2078 is housed in a 32-pin, 5mm x 5mm, RoHS-compliant, QFN package.

Key Features
  • Burst-Mode Common Anode Laser Driver with Up to 80mA Modulation and 90mA Bias Current
  • 7ns Output Switching in Burst Mode
  • Power-Saving Mode with Zero Bias and Modulation Current Between Bursts
  • Closed or Open-Loop Bias Mode with Temperature Lookup Table
  • Temperature-Compensated Modulation Current
  • Limiting Amplifier with Programmable Lowpass Filter and Output Swing
  • Device Settings Stored in External 2k EEPROM
Applications/Uses
  • BPON
  • GEPON
  • GPON
DataSheet
titleDownload file
PHY2078 Data SheetPHY2078.pdf
Parametrics
Part NumberApplicationsTarget Oper. Range
(Gbps)		Data Rate
(Mbps)		Data Rate
(Mbps)		VSUPPLY
(V)		ICC
(mA)		I/O TypeIMOD
(mA)		IBIAS
(mA)		Package/PinsOper. Temp.
(°C)
minmaxtypmaxmax
PHY2078BPON
GEPON
GPON		0.125 to 2.512524883.3120CML8090SQFN/32
TQFN/32		-40 to +95
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
PHY2078-01EVAL-ENo Longer AvailableEVKIT;Special - See Data SheetSee data sheet
PHY2078-01EVAL-OANo Longer AvailableEVKIT;Special - See Data SheetSee data sheet
PHY2078-01EVAL-OPNo Longer AvailableEVKIT;Special - See Data SheetSee data sheet
PHY2078-01EVAL-OP-NDNo Longer AvailableKIT;Special - See Data SheetSee data sheet
PHY2078-01MOD-OANo Longer AvailableEVKIT;Special - See Data SheetSee data sheet
PHY2078-01MOD-OPNo Longer AvailableEVKIT;Special - See Data SheetSee data sheet
PHY2078QS-BRNo Longer AvailablePHY2078QT-BRSQFN,;32 pin;25.8 mm²Special - See Data SheetLead Free
PHY2078QS-RRNo Longer AvailablePHY2078QT-RRSQFN,;32 pin;25.8 mm²Special - See Data SheetLead Free
PHY2078QT-BRLast Time BuyTQFN,;32 pin;26 mm²Special - See Data SheetLead Free
PHY2078QT-RRActiveTQFN,;32 pin;26 mm²Special - See Data SheetLead Free
PHY2078.pdf PHY2078
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