TRANSPORT PHYSICAL LAYER
VSC8238
10.3125 Gbps Advanced Electronic Equalization with Limiting Amplifier, and Clock and Data Recovery
BLOCK DIAGRAM:
Initialization and Control
Link Monitor
Micro-Controller
Interface
Error Proxy
VSC8238
AGC
10.3125 Gbps
RXDATA_IN
VSC8238
FFE/DFE EQ Limiting Amplifier
and CDR
10.3125 Gbps
RXDATA_OUT
F E AT U R E S :
Multitap FFE and DFE filter
Integrated CDR and XFI output driver
Integrated AGC and offset controls
BENEFITS:
Provides superior modal dispersion compensation and exceeds
10GBASE-LRM specifications
Provides XFP-compatible Rx CDR for XPF LRM module applications
Provides robust handing of wide TIA input signal range and duty cycle
conditions
FUNCTIONAL BLOCK DIAGRAM:
RXLOL
REFCLK
LTREF
REF_SEL
LF
(Ext Cap)
AGC_IN
AGC
Equalizer, Limiting Amplifier, and CDR
EQ_OUT
Link
Monitor
SPI or Parallel
Interface
RSTN
To Micro-Controller
Link Monitor
A P P L I C AT I O N S :
XENPAK/X2 10GBASE-LRM module applications
XFP 10GBASE-LRM module applications
VPPD-01657
Revision 1.0
VITESSE [ VITESSE SEMICONDUCTOR CORPORATION ]
