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QPRO
TM
XQ4000E/EX QML High-Reliability Field Programmable Gate Arrays
4
May 19, 1998 (Version 2.1)
XQ4000E Horizontal Longline Switching Characteristic Guidelines
Testing of switching parameters is modeled after testing methods specified by MIL-M-38510/605. All devices are 100%
functionally tested. Internal timing parameters are derived from measuring internal test patterns. Listed below are
representative values. For more specific, more precise, and worst-case guaranteed data, use the values reported by the
static timing analyzer
(TRCE in the Xilinx Development System)
and back-annotated to the simulation netlist. These path
delays, provided as a guideline, have been extracted from the static timing analyzer report. All timing parameters assume
worst-case operating conditions (supply voltage and junction temperature). Values apply to all XQ4000E/EX devices unless
otherwise noted.
The following guidelines reflect worst-case values over the recommended operating conditions.
Note 1:
These values include a minimum load. Use the static timing analyzer to determine the delay for each destination.
Speed Grade
Description
TBUF driving a Horizontal Longline (LL):
I going High or Low to LL going High or Low, while T is Low.
Buffer is constantly active. (Note1)
-3
-4
Units
Symbol
Device
Max
Max
T
IO1
XQ4005E
XQ4010E
XQ4013E
XQ4025E
XQ4005E
XQ4010E
XQ4013E
XQ4025E
XQ4005E
XQ4010E
XQ4013E
XQ4025E
6.4
7.2
5.0
8.0
9.0
11.0
6.0
10.5
11.0
12.0
7.0
8.5
8.7
11.0
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
I going Low to LL going from resistive pull-up High to active Low.
TBUF configured as open-drain. (Note1)
T
IO2
6.9
7.7
T going Low to LL going from resistive pull-up or floating High to
active Low.
TBUF configured as open-drain or active buffer with I = Low.
(Note1)
T going High to TBUF going inactive, not driving LL
T
ON
7.3
7.5
T
OFF
XQ4005E
XQ4010E
XQ4013E
XQ4025E
XQ4005E
XQ4010E
XQ4013E
XQ4025E
XQ4005E
XQ4010E
XQ4013E
XQ4025E
1.8
3.0
3.5
4.0
23.0
29.0
32.0
42.0
10.0
13.5
15.0
18.0
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
T going High to LL going from Low to High, pulled up by a single
resistor. (Note 1)
T
PUS
22
26
T going High to LL going from Low to High, pulled up by two resis-
tors. (Note1)
T
PUF
11
13