
Virtex-E 1.8 V Field Programmable Gate Arrays
R
DS022-3 (v3.0) March 21, 2014
Module 3 of 4
Production Product Specification
9
— OBSOLETE — OBSOLETE — OBSOLETE — OBSOLETE —
IOB Output Switching Characteristics, Figure 1 Output delays terminating at a pad are specified for LVTTL with 12 mA drive and fast slew rate. For other standards, adjust
Speed Grade(1)
Units
Description(2)
Symbol
Min
-8
-7
-6
Propagation Delays
O input to Pad
TIOOP
1.04
2.5
2.7
2.9
ns, max
O input to Pad via transparent latch
TIOOLP
1.24
2.9
3.1
3.4
ns, max
3-State Delays
T input to Pad high-impedance (Note 2)
TIOTHZ
0.73
1.5
1.7
1.9
ns, max
T input to valid data on Pad
TIOTON
1.13
2.7
2.9
3.1
ns, max
T input to Pad high-impedance via transparent
latch (Note 2)
TIOTLPHZ
0.86
1.8
2.0
2.2
ns, max
T input to valid data on Pad via transparent latch
TIOTLPON
1.26
3.0
3.2
3.4
ns, max
GTS to Pad high impedance (Note 2)
TGTS
1.94
4.1
4.6
4.9
ns, max
Sequential Delays
Clock CLK
Minimum Pulse Width, High
TCH
0.56
1.2
1.3
1.4
ns, min
Minimum Pulse Width, Low
TCL
0.56
1.2
1.3
1.4
ns, min
Clock CLK to Pad
TIOCKP
0.97
2.4
2.8
2.9
ns, max
Clock CLK to Pad high-impedance (synchronous)
(Note 2)
TIOCKHZ
0.77
1.6
2.0
2.2
ns, max
Clock CLK to valid data on Pad (synchronous)
TIOCKON
1.17
2.8
3.2
3.4
ns, max
Setup and Hold Times before/after Clock CLK
O input
TIOOCK / TIOCKO
0.43 / 0
0.9 / 0
1.0 / 0
1.1 / 0
ns, min
OCE input
TIOOCECK / TIOCKOCE
0.28 / 0
0.55 / 0.01
0.7 / 0
ns, min
SR input (OFF)
TIOSRCKO / TIOCKOSR
0.40 / 0
0.8 / 0
0.9 / 0
1.0 / 0
ns, min
3-State Setup Times, T input
TIOTCK / TIOCKT
0.26 / 0
0.51 / 0
0.6 / 0
0.7 / 0
ns, min
3-State Setup Times, TCE input
TIOTCECK / TIOCKTCE
0.30 / 0
0.6 / 0
0.7 / 0
0.8 / 0
ns, min
3-State Setup Times, SR input (TFF)
TIOSRCKT / TIOCKTSR
0.38 / 0
0.8 / 0
0.9 / 0
1.0 / 0
ns, min
Set/Reset Delays
SR input to Pad (asynchronous)
TIOSRP
1.30
3.1
3.3
3.5
ns, max
SR input to Pad high-impedance (asynchronous)
(Note 2)
TIOSRHZ
1.08
2.2
2.4
2.7
ns, max
SR input to valid data on Pad (asynchronous)
TIOSRON
1.48
3.4
3.7
3.9
ns, max
GSR to Pad
TIOGSRQ
3.88
7.6
8.5
9.7
ns, max
Notes:
1.
A Zero “0” Hold Time listing indicates no hold time or a negative hold time. Negative values can not be guaranteed “best-case”, but
if a “0” is listed, there is no positive hold time.
2.
3-state turn-off delays should not be adjusted.