ICS85454AKT IDT, Integrated Device Technology Inc, ICS85454AKT Datasheet - Page 8

• Manufacturer Part Number: ICS85454AKT
• Manufacturer: IDT, Integrated Device Technology Inc

Specifications of ICS85454AKT

• Function: Clock Multiplexer
• Operating Temperature (max): 85C
• Operating Temperature (min): -40C
• Package Type: VFQFN
• Pin Count: 16
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Not Compliant

A T
Used to connect a multi-rate PHY with the Tx/Rx pins of an
SFP Module.
M
All lines are differential pairs, but drawn as single-ended to sim-
plify the drawing.
IDT
ICS85454
DUAL 2:1 AND 1:2 DIFFERENTIAL-TO-LVDS MULTIPLEXER
ODE
™
YPICAL
/ ICS
1, 100B
™
DUAL 2:1 AND 1:2 LVDS MULTIPLEXER
A
PPLICATION FOR THE
ASE
M
100BaseFX
1000BaseX
ULTI
X C
-R
ONNECTED TO
ATE
M
PHY
ULTI
100BaseFX
1000BaseX
-R
Tx
Rx
Tx
Rx
ICS85454
ATE
SFP
PHY
Rx
Rx
Tx
Tx
CLK_SELA = 0
➣
➣
CLKA0
CLKA1
QB0
QB1
➣
➣
ICS85354
?
ICS85454
8
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.
Bold red lines
signal path.
0
1
➣
QA
CLKB
➣
Rx
Tx
SFP M
ODULE
are active connections highlighting the
Rx
Tx
ICS85454 REV. B FEBRUARY 24, 2009
CLK_SELB = 0
SFP M
ODULE