GN2014A XFP Tx Signal Conditioner with VCSEL Driver
Features
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XFP Datacom Compliant Transmit Signal Conditioner
Integrated VCSEL driver with Cross Point Adjust
functionality to optimize optical performance
Single 3.3V supply
Power dissipation: 300mW (typical, assuming 700mVppd
data output amplitude)
Multi-rate operation: 9.95Gb/s – 11.3Gb/s
No reference clock required
Laser shut down option
Automatic input offset correction
On chip 100Ω differential I/O termination
Loss of Lock indicator
Loopback differential output
CDR Bypass Option
Bit Inversion capability
Applications
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Transmit path signal conditioner for XFP and SFP+
transceiver modules
General Description
The GN2014A is a transmit path signal conditioner with
integrated VCSEL driver designed to offer power and cost
savings relative to external laser driver solutions. The
GN2014A provides integrated modulation and eye shaping
capability while maintaining pin compatibility with
previous generation parts.
RTEn
POLInv
LBEn
DC OFFSET
CORRECTION
CIRCUIT
0
EQIP
EQIN
EQUALIZER
PHASE
DETECTOR
LOS CIRCUIT
(Note 1)
LOCK
DETECTOR
CHARGE PUMP/
LOOP FILTER
VCO
D
CLK
Q
S
LBOP
LBO
BUF
LBON
SDOP
MUX
1
INVERTER
SDO
BUF
SDON
LOS
LDDisable
LOL
LBWCtrl
LF
SWNGSel
CPA
CPAPol
Note 1: The LOS Threshold is set by defualt to 100mVppd.
Figure A: GN2014A Block Diagram
LINE
CARD
XFP MODULE
10Gb/s
SERDES/
ASIC
10Gb/s
GN2003S
GN2014A
LASER
DIODE
LINE
CARD
XFP MODULE
PHOTO
DIODE
LASER
DIODE
TIA
GN1052
10Gb/s
GN2003S
SERDES/
ASIC
10Gb/s
TIA
GN1052
PHOTO
DIODE
GN2014A
Figure B: Typical Usage
GN2014A XFP Tx Signal Conditioner with VCSEL Driver
Data Sheet
39260 - 8
May 2010
1 of
Proprietary & Confidential
GENNUM [ GENNUM CORPORATION ]
