SuperLite™
SY55854U
Micrel, Inc.
TRUTH TABLE
S0
0
S1
0
Q0
D0
Q1
D0
Function
Fan-Out Buffer
Dual Buffer
0
1
D0
D1
1
0
D1
D0
Dual Buffer
1
1
D1
D1
Fan-Out Buffer
Redundant Distribution
Crosspoint
CTL
CTL
CTL
/CTL
Same
Opposite
Same
Opposite
CML TERMINATION
All inputs accept the output from any other member of speed design practices be adhered to. SY55854U inputs
this family. All outputs are source terminated 100Ω CML are designed to accept a termination resistor between the
differential drivers as shown in Figures 3 and 4. SY55854U true and complement inputs of a differential pair. 0402 form
expects the inputs to be terminated, and that good high factor chip resistors will fit with some trace fanout.
vcc
vcc
vcc
50Ω
100Ω
100Ω
50Ω
100Ω
100Ω
100Ω 100Ω
100Ω
100Ω
50Ω
50Ω
100Ω
50Ω
50Ω
8mA
8mA
SY55854U
SY55854U
Figure 3a. Differentially Terminated
Figure 3b. Individually Terminated
(50Ω Load CML Output)
(50Ω Load CML Output)
VCC
100Ω
100Ω
100Ω
200Ω
100Ω
8mA
SY55854U
Figure 4. 100Ω Load CML Output
M9999-041206
hbwhelp@micrel.com or (408) 955-1690
4
MICREL [ MICREL SEMICONDUCTOR ]
