R
DC and Switching Characteristics
Clock Buffer/Multiplexer Switching Characteristics
Table 101: Clock Distribution Switching Characteristics
Maximum
Speed Grade
Description
Symbol
-5
-4
Units
Global clock buffer (BUFG, BUFGMUX, BUFGCE) I input to O-output delay
T
1.46
1.46
ns
GIO
Global clock multiplexer (BUFGMUX) select S-input setup to I0 and I1
inputs. Same as BUFGCE enable CE-input
T
0.55
333
0.63
311
ns
GSI
Frequency of signals distributed on global buffers (all sides)
F
MHz
BUFG
140
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DS312-3 (v3.8) August 26, 2009
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