Ac timing characteristics – 5v operation at40k, At40k/at40klv series fpga – Rainbow Electronics AT40K40LV User Manual
Page 25
25
AT40K/AT40KLV Series FPGA
0896C–FPGA–04/02
AC Timing Characteristics – 5V Operation AT40K
Delays are based on fixed loads and are described in the notes.
Maximum times based on worst case: V
CC
= 4.75V, temperature = 70
°C
Minimum times based on best case: V
CC
= 5.25V, temperature = 0
°C
Maximum delays are the average of t
PDLH
and t
PDHL
.
Cell Function
Parameter
Path
-2
Units
Notes
Core
2-input Gate
t
PD
(Maximum)
x/y -> x/y
1.8
ns
1 unit load
3-input Gate
t
PD
(Maximum)
x/y/z -> x/y
2.1
ns
1 unit load
3-input Gate
t
PD
(Maximum)
x/y/w -> x/y
2.2
ns
1 unit load
4-input Gate
t
PD
(Maximum)
x/y/w/z -> x/y
2.2
ns
1 unit load
Fast Carry
t
PD
(Maximum)
y -> y
1.4
ns
1 unit load
Fast Carry
t
PD
(Maximum)
x -> y
1.7
ns
1 unit load
Fast Carry
t
PD
(Maximum)
y -> x
1.8
ns
1 unit load
Fast Carry
t
PD
(Maximum)
x -> x
1.5
ns
1 unit load
Fast Carry
t
PD
(Maximum)
w -> y
2.2
ns
1 unit load
Fast Carry
t
PD
(Maximum)
w -> x
2.3
ns
1 unit load
Fast Carry
t
PD
(Maximum)
z -> y
2.3
ns
1 unit load
Fast Carry
t
PD
(Maximum)
z -> x
1.7
ns
1 unit load
DFF
t
PD
(Maximum)
q -> x/y
1.8
ns
1 unit load
DFF
t
PD
(Maximum)
R -> x/y
2.2
ns
1 unit load
DFF
t
PD
(Maximum)
S -> x/y
2.2
ns
1 unit load
DFF
t
PD
(Maximum)
q -> w
1.8
ns
Incremental -> L
t
PD
(Maximum)
x/y -> L
1.5
ns
1 unit load
Local Output Enable
t
PZX
(Maximum)
oe -> L
1.4
ns
1 unit load
Local Output Enable
t
PXZ
(Maximum)
oe -> L
1.8
ns