AC Timing Characteristics – 5V Operation AT40K
Delays are based on fixed loads and are described in the notes.
Maximum times based on worst case: VCC = 4.75V, temperature = 70°C
Minimum times based on best case: VCC = 5.25V, temperature = 0°C
Maximum delays are the average of tPDLH and tPDHL
All input IO characteristics measured from a VIH of 50% of VDD at the pad (CMOS threshold) to the internal VIH of 50%
of VCC. All output IO characteristics are measured as the average of tPDLH and tPDHL to the pad VIH of 50% of VCC
.
.
Cell Function
Repeaters
Repeater
Repeater
Repeater
Repeater
Repeater
Repeater
Parameter
Path
-2
Units
Notes
tPD (Maximum)
L -> E
E -> E
L -> L
E -> L
E -> IO
L -> IO
1.3
1.3
1.3
1.3
0.8
0.8
ns
ns
ns
ns
ns
ns
1 unit load
1 unit load
1 unit load
1 unit load
1 unit load
1 unit load
tPD (Maximum)
t
PD (Maximum)
PD (Maximum)
t
tPD (Maximum)
PD (Maximum)
t
All input IO characteristics measured from a VIH of 50% at the pad (CMOS threshold) to the internal VIH of 50% of VCC. All
output IO characteristics are measured as the average of tPDLH and tPDHL to the pad VIH of 50% of VCC
.
Cell Function
IO
Parameter
Path
-2
Units
Notes
Input
t
t
t
t
t
PD (Maximum)
PD (Maximum)
PD (Maximum)
PD (Maximum)
PD (Maximum)
pad -> x/y
pad -> x/y
pad -> x/y
pad -> x/y
x/y/E/L -> pad
x/y/E/L -> pad
x/y/E/L -> pad
oe -> pad
1.2
3.6
7.3
10.8
5.9
4.8
3.9
6.2
1.3
4.8
1.9
3.7
1.6
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
No extra delay
1 extra delay
2 extra delays
3 extra delays
50 pf load
Input
Input
Input
Output, Slow
Output, Medium
Output, Fast
Output, Slow
Output, Slow
Output, Medium
Output, Medium
Output, Fast
Output, Fast
tPD (Maximum)
50 pf load
tPD (Maximum)
tPZX (Maximum)
tPXZ (Maximum)
tPZX (Maximum)
tPXZ (Maximum)
50 pf load
50 pf load
oe -> pad
50 pf load
oe -> pad
50 pf load
oe -> pad
50 pf load
tPZX (Maximum)
PXZ (Maximum)
oe -> pad
50 pf load
t
oe -> pad
50 pf load
26
AT40K/AT40KLV Series FPGA
0896C–FPGA–04/02
ATMEL [ ATMEL ]
