ICS853S54I Datasheet, PDF (13/21 Pages) Integrated Device Technology – Maximum output frequency

ICS853S54I Data Sheet
A Typical Application for the ICS853S54I
Used to connect a multi-rate PHY with the Tx/Rx pins of an SFP
Module.
Problem Addressed: How to map the 2 Tx/Rx pairs of the multi-rate
PHY to the single Tx/Rx pair on the SFP Module.
MULTI-RATE PHY
Tx
100BaseFX
Rx
?
Tx
1000BaseX
Rx
DUAL 2:1, 1:2 DIFFERENTIAL-TO-LVPECL/ECL MULTIPLEXER
SFP MODULE
Rx
Tx
Mode 1, 100BaseX Connected to SFP
All lines are differential pairs, but drawn as single-ended to simplify
the drawing.
Bold red lines
signal path.
are active connections highlighting the
MULTI-RATE PHY
Tx
100BaseFX
Rx
CLK_SELA = 0
CLKA0
0
CLKA1
1
QB0
QA
CLKB
SFP MODULE
Rx
Tx
Tx
1000BaseX
Rx
QB1
ICS85354
CLK_SELB = 0
ICS853S54AKI REVISION A OCTOBER 30, 2012
13
©2012 Integrated Device Technology, Inc.