A54SX08-TQ176 Datasheet, PDF (32/64 Pages) Actel Corporation – SX Family FPGAs

SX Family FPGAs
A54SX16P Timing Characteristics
Table 1-19 • A54SX16P Timing Characteristics
(Worst-Case Commercial Conditions, V_CCR = 4.75 V, V_CCA,V_CCI = 3.0 V, T_J = 70°C)
'–3' Speed '–2' Speed '–1' Speed
'Std' Speed
Parameter Description
C-Cell Propagation Delays¹
Min. Max. Min. Max. Min. Max. Min. Max. Units
t_PD
Internal Array Module
Predicted Routing Delays²
0.6
0.7
0.8
0.9
ns
t_DC
FO = 1 Routing Delay, Direct Connect
t_FC
FO = 1 Routing Delay, Fast Connect
t_RD1
FO = 1 Routing Delay
t_RD2
FO = 2 Routing Delay
t_RD3
FO = 3 Routing Delay
t_RD4
FO = 4 Routing Delay
t_RD8
FO = 8 Routing Delay
t_RD12
FO = 12 Routing Delay
R-Cell Timing
0.1
0.1
0.1
0.1
ns
0.3
0.4
0.4
0.5
ns
0.3
0.4
0.4
0.5
ns
0.6
0.7
0.8
0.9
ns
0.8
0.9
1.0
1.2
ns
1.0
1.2
1.4
1.6
ns
1.9
2.2
2.5
2.9
ns
2.8
3.2
3.7
4.3
ns
t_RCO
Sequential Clock-to-Q
t_CLR
Asynchronous Clear-to-Q
t_PRESET
Asynchronous Preset-to-Q
t_SUD
Flip-Flop Data Input Set-Up
t_HD
Flip-Flop Data Input Hold
t_WASYN
Asynchronous Pulse Width
Input Module Propagation Delays
0.9
1.1
1.3
1.4
ns
0.5
0.6
0.7
0.8
ns
0.7
0.8
0.9
1.0
ns
0.5
0.5
0.7
0.8
ns
0.0
0.0
0.0
0.0
ns
1.4
1.6
1.8
2.1
ns
t_INYH
Input Data Pad-to-Y HIGH
t_INYL
Input Data Pad-to-Y LOW
Predicted Input Routing Delays²
1.5
1.7
1.9
2.2
ns
1.5
1.7
1.9
2.2
ns
t_IRD1
FO = 1 Routing Delay
0.3
0.4
0.4
0.5
ns
t_IRD2
FO = 2 Routing Delay
0.6
0.7
0.8
0.9
ns
t_IRD3
FO = 3 Routing Delay
0.8
0.9
1.0
1.2
ns
t_IRD4
FO = 4 Routing Delay
1.0
1.2
1.4
1.6
ns
t_IRD8
FO = 8 Routing Delay
1.9
2.2
2.5
2.9
ns
t_IRD12
FO = 12 Routing Delay
2.8
3.2
3.7
4.3
ns
Note:
1. For dual-module macros, use t_PD + t_RD1 + t_PDn, t_RCO + t_RD1 + t_PDn, or t_PD1 + t_RD1 + t_SUD, whichever is appropriate.
2. Routing delays are for typical designs across worst-case operating conditions. These parameters should be used for estimating
device performance. Post-route timing analysis or simulation is required to determine actual worst-case performance. Post-route
timing is based on actual routing delay measurements performed on the device prior to shipment.
3. Delays based on 10 pF loading.
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