sy58603u Micrel Semiconductor, sy58603u Datasheet - Page 6

• Manufacturer Part Number: sy58603u
• Description: Sy58603u 4.25gbps Precision Cml Buffer With Internal Termination And Fail Safe Input
• Manufacturer: Micrel Semiconductor

Micrel, Inc.
Functional Description
Fail-Safe Input (FSI)
The input includes a special failsafe circuit to sense
the amplitude of the input signal and to latch the
output when there is no input signal present, or when
the amplitude of the input signal drops sufficiently
below
Maximum frequency of SY58603U is limited by the
FSI function.
Timing Diagrams
August 2007
100mV
PK
(200mV
PP
),
typically
30mV
Figure 1a. Propagation Delay
Figure 1b. Fail Safe Feature
PK
.
6
Input Clock Failure Case
If the input clock fails to a floating, static, or extremely
low signal swing, the FSI function will eliminate a
metastable condition and guarantee a stable output.
No ringing and no undetermined state will occur at the
output under these conditions.
Note that the FSI function will not prevent duty cycle
distortion in case of a slowly deteriorating (but still
toggling) input signal. Due to the FSI function, the
propagation delay will depend on rise and fall time of
the input signal and on its amplitude. Refer to “Typical
Characteristics” for detailed information.
[e-mail]
or [phone]
M9999-082707-B
SY58603U