Accelerator Series FPGAs – ACT 3 Family
R e visio n 3
2 - 25
A1415A, A14V15A Timing Characteristics (continued)
Table 2-21 A1415A, A14V15A Worst-Case Commercial Conditions, VCC = 4.75 V, TJ = 70°C
Dedicated (hardwired) I/O Clock Network
–3 Speed –2 Speed –1 Speed Std. Speed 3.3 V Speed1 Units
Parameter/Description
Min. Max. Min. Max. Min. Max. Min. Max. Min.
Max.
tIOCKH
Input Low to High (pad to I/O module
input)
2.0
2.3
2.6
3.0
3.5
ns
tIOPWH
Minimum Pulse Width High
1.9
2.4
3.3
3.8
4.8
ns
tIPOWL
Minimum Pulse Width Low
1.9
2.4
3.3
3.8
4.8
ns
tIOSAPW Minimum Asynchronous Pulse Width
1.9
2.4
3.3
3.8
4.8
ns
tIOCKSW Maximum Skew
0.4
ns
tIOP
Minimum Period
4.0
5.0
6.8
8.0
10.0
ns
fIOMAX
Maximum Frequency
250
200
150
125
100
MHz
Dedicated (hardwired) Array Clock
tHCKH
Input Low to High (pad to S-module
input)
3.0
3.4
3.9
4.5
5.5
ns
tHCKL
Input High to Low (pad to S-module
input)
3.0
3.4
3.9
4.5
5.5
ns
tHPWH
Minimum Pulse Width High
1.9
2.4
3.3
3.8
4.8
ns
tHPWL
Minimum Pulse Width Low
1.9
2.4
3.3
3.8
4.8
ns
tHCKSW
Delta High to Low, Low Slew
0.3
ns
tHP
Minimum Period
4.0
5.0
6.8
8.0
10.0
ns
fHMAX
Maximum Frequency
250
200
150
125
100
MHz
Routed Array Clock Networks
tRCKH
Input Low to High (FO = 64)
3.7
4.1
4.7
5.5
9.0
ns
tRCKL
Input High to Low (FO = 64)
4.0
4.5
5.1
6.0
9.0
ns
tRPWH
Min. Pulse Width High (FO = 64)
3.3
3.8
4.2
4.9
6.5
ns
tRPWL
Min. Pulse Width Low (FO = 64)
3.3
3.8
4.2
4.9
6.5
ns
tRCKSW
Maximum Skew (FO = 128)
0.7
0.8
0.9
1.0
ns
tRP
Minimum Period (FO = 64)
6.8
8.0
8.7
10.0
13.4
ns
fRMAX
Maximum Frequency (FO = 64)
150
125
115
100
75
MHz
Clock-to-Clock Skews
tIOHCKSW I/O Clock to H-Clock Skew
0.0
1.7
0.0
1.8
0.0
2.0
0.0
2.2
0.0
3.0
ns
tIORCKSW I/O Clock to R-Clock Skew (FO = 64)
0.0
1.0
0.0
1.0
0.0
1.0
0.0
1.0
0.0
3.0
ns
tHRCKSW H-Clock to R-Clock Skew (FO = 64)
(FO = 50% maximum)
0.0
1.0
0.0
1.0
0.0
1.0
0.0
1.0
0.0
3.0
ns
Notes:
1. Delays based on 35 pF loading.