DS077-3 (v3.0) August 9, 2013
35
Product Specification
Spartan-IIE FPGA Family: DC and Switching Characteristics
R
— OBSOLETE — OBSOLETE — OBSOLETE — OBSOLETE —
Switching Characteristics
Internal timing parameters are derived from measuring
internal test patterns. Listed below are representative val-
ues. For more specific, more precise, and worst-case guar-
anteed data, use the values reported by the static timing
analyzer (TRACE in the Xilinx Development System) and
back-annotated to the simulation netlist. All timing parame-
ters assume worst-case operating conditions (supply volt-
age and junction temperature). Values apply to all
Spartan-IIE devices unless otherwise noted.
Global Clock Input to Output Delay for LVTTL, with DLL (Pin-to-Pin)(1)
Global Clock Input to Output Delay for LVTTL, without DLL (Pin-to-Pin)(1)
Symbol
Description
Speed Grade
Units
All
-7
-6
Min
Max
TICKOFDLL
LVTTL global clock input to output delay using
output flip-flop for LVTTL, 12 mA, fast slew rate,
with DLL.
1.0
3.1
ns
Notes:
1.
Listed above are representative values where one global clock input drives one vertical clock line in each accessible column, and
where all accessible IOB and CLB flip-flops are clocked by the global clock net.
2.
Output timing is measured at 1.4V with 35 pF external capacitive load for LVTTL. The 35 pF load does not apply to the Min values.
3.
DLL output jitter is already included in the timing calculation.
4.
Symbol
Description
Device
Speed Grade
Units
All
-7
-6
Min
Max
TICKOF
LVTTL global clock input to output
delay using output flip-flop for
LVTTL, 12 mA, fast slew rate,
without DLL.
XC2S50E
1.5
4.4
4.6
ns
XC2S100E
1.5
4.4
4.6
ns
XC2S150E
1.5
4.5
4.7
ns
XC2S200E
1.5
4.5
4.7
ns
XC2S300E
1.5
4.5
4.7
ns
XC2S400E
1.5
4.6
4.8
ns
XC2S600E
1.6
4.7
4.9
ns
Notes:
1.
Listed above are representative values where one global clock input drives one vertical clock line in each accessible column, and
where all accessible IOB and CLB flip-flops are clocked by the global clock net.
2.
Output timing is measured at 1.4V with 35 pF external capacitive load for LVTTL. The 35 pF load does not apply to the Min values.
3.