R
QPRO™ XQ4000XL Series QML High-Reliability FPGAs
XQ4000XL IOB Input 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).
Speed Grade
Device
-3
-1
Units
Description
Symbol
Min
Min
Clocks
Clock Enable (EC) to Clock (IK)
Delay from FCL enable (OK) active edge to IFF clock (IK)
active edge
T
T
All devices
All devices
0.3
1.7
0.3
1.7
ns
ns
ECIK
OKIK
Setup Times
Pad to Clock (IK), no delay
Pad to Clock (IK), via transparent Fast Capture Latch, no
delay
T
T
All devices
All devices
1.7
2.3
1.7
2.3
ns
ns
PICK
PICKF
Pad to Fast Capture Latch Enable (OK), no delay
Hold Times
T
All devices
All devices
0.7
0
0.7
0
ns
ns
POCK
All Hold Times
Global Set/Reset
Minimum GSR Pulse Width
Delay from GSR input to any Q
T
T
All devices
XQ4013XL
XQ4036XL
XQ4062XL
XQ4085XL
19.8
15.9
22.5
29.1
-
19.8
-
-
ns
ns
ns
ns
ns
MRW
RRI
-
26.0
Max
1.6
2.6
3.1
1.8
1.9
3.6
Propagation Delays
Max
1.6
Pad to I1, I2
T
T
All devices
All devices
All devices
All devices
All devices
All devices
ns
ns
ns
ns
ns
ns
PID
PLI
Pad to I1, I2 via transparent input latch, no delay
2.6
Pad to I1, I2 via transparent FCL and input latch, no delay T
3.1
PFLI
Clock (IK) to I1, I2 (flip-flop)
T
T
T
1.8
1.9
3.6
IKRI
IKLI
Clock (IK) to I1, I2 (latch enable, active Low)
FCL Enable (OK) active edge to I1, I2
(via transparent standard input latch)
IFF = Input Flip-Flop or Latch, FCL = Fast Capture Latch
OKLI
14
DS029 (v1.2) February 9, 2000
XILINX [ XILINX, INC ]
