VITESSE VSC7965

TRANSPORT PHYSICAL LAYER
VSC7965
PON Integrated 155 Mbps to 1.25 Gbps Burst-mode Laser Driver and Limiting Amplifier
A P P L I C AT I O N S :
„ BPON, GE-PON, GPON burst-mode laser driver
S P E C I F I C AT I O N S :
„ Package size: 5 mm x 5 mm QFN
VSC7965
„ Maximum modulation = 80 mA
„ Typical core power = 330 mW
„ Operating temperature range = -40 °C to 100 °C
F E AT U R E S :
BENEFITS:
„ APC loop requires no initialization phase
„ Laser driver is ready to transmit upon power up
„ VSC7965 meets the specification for BPON, GE-PON, and GPON
„ Allows the VSC7965 to be used in both PON and SFP module
solutions
„ Burst enable input supports LVPECL, LVDS, and LVTTL output levels
„ Allows PON module to interoperate with multiple upstream devices
„ Selectable resistance on monitor diode input
„ Improves accuracy of the monitor diode input by allowing the user to
select the resistance and capacitance in the input
„ Laser driver crossing point control
„ Enables the user to adjust the level of the crossing point on the laser
driver output
„ Built-in eye safety support
„ No external components are required to meet IEC-60825 eye safety
specifications
A P P L I C AT I O N D I A G R A M :
BPON ONU Module
VSC7965
MON_SEL
Limiting Amplifier
TIA at
1490 nm
Burst-mode Laser Driver
Laser
at
1310 nm
Fault and
Control Logic
Connector
Triplexor
SPI
Analog MUX
Analog
Video
Receive
at
1555 nm
Downstream Video at 1555 nm
Downstream Receive Data at 1490 nm
Upstream Data at 1310 nm
ADC
Microcontroller
CATV Receive
Video Amplifier
VPPD-01136
Revision 1.1
VSC7965
PON Integrated Burst-mode Laser Driver and Limiting Amplifier
GENERAL DESCRIPTION:
VSC7965
The VSC7965 is a multirate 1.25 Gbps integrated
current, average power, and the limiting amplifier loss of signal
laser driver and limiting amplifier for Passive
threshold. The VSC7965 is equipped with SFP-compliant fault
Optical Network applications optimized to reduce
indicators, redundant disable control, Automatic Power Control,
module cost. The device is intended to drive
temperature sensor, various signal monitors, and robust eye safety
distributed feedback (DFB) and Fabry Perot (FP)
features. The VSC7965 is available in a 5mm x 5mm 32-pin QFN
lasers. A standard SPI port is provided for programming integrated
plastic package.
digital-to-analog converters for laser bias current, modulation
BLOCK DIAGRAMS:
BSRC = VCC
Laser Driver
VCC
VCC
15 Ω
15 Ω
IMOD
5Ω
OUT
OUTN
15 Ω
5Ω
DATA
DATAN
IMOD
IBIAS
BSNK
BSNKN
BEN
IMD
MD
Modulation and
Bias Control and Montoring
VCC
TX_FAULT
BENN_TX_DIS
10 kΩ
AOUT
10 kΩ
Limiting Amplifier
VCC
LA_SQSRC
DCRST[1:0]
7 kΩ
LA_SQFORCE
DCRST1
Peak
Detector
and
Control
RPK_STAGE
Output
Control
LOSMON
LOS
LA_SQMON
DCRST[1:0]
50 Ω
DCRST2
LIN
100 Ω
50 Ω
LOUT
S1
S2
S3
S4
S5
LOUTN
TM
Trademarks
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 United States and/or
other jurisdictions of Vitesse Semiconductor Corporation. All other trademarks or registered trademarks mentioned herein are the property of their respective
holders.
Copyright © 2005–2006
Vitesse Semiconductor Corporation (“Vitesse”) retains the right to make changes to its products or specifications to improve performance, reliability or
manufacturability. All information in this document, including descriptions of features, functions, performance, technical specifications and availability, is
subject to change without notice at any time. While the information furnished herein is held to be accurate and reliable, no responsibility 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.
741 Calle Plano
Camarillo, CA 93012, USA
Tel: +1 805.388.3700
Fax: +1 805.987.5896
www.vitesse.com
[email protected]