RadTolerant FPGAs
v3.1
1-17
RT1020, A1020B Timing Characteristics
Table 1-10 RT1020, A1020B Logic and Input Modules
Worst-Case Military Conditions, VCC = 4.5 V, TJ = 125°C
Std Speed
Parameter
Description
Min.
Max.
Units
Logic Module Propagation Delays
tPD1
Single Module
3.6
ns
tPD2
Dual Module Macros
8.4
ns
tCO
Sequential Clock to Q
3.6
ns
tGO
Latch G to Q
3.6
ns
tRS
Flip-Flop (Latch) Reset to Q
3.6
ns
Logic Module Predicted Routing Delays1
tRD1
FO=1 Routing Delay
1.1
ns
tRD2
FO=2 Routing Delay
1.8
ns
tRD3
FO=3 Routing Delay
2.6
ns
tRD4
FO=4 Routing Delay
3.9
ns
tRD8
FO=8 Routing Delay
8.1
ns
Logic Module Sequential Timing2
tSUD
Flip-Flop (Latch) Data Input Setup
6.9
ns
tHD
3
Flip-Flop (Latch) Data Input Hold
0.0
ns
tSUENA
Flip-Flop (Latch) Enable Setup
6.9
ns
tHENA
Flip-Flop (Latch) Enable Hold
0.0
ns
tWCLKA
Flip-Flop (Latch) Clock Active Pulse Width
8.4
ns
tWASYN
Flip-Flop (Latch) Asynchronous Pulse Width
8.4
ns
tA
Flip-Flop Clock Input Period
17.5
ns
fMAX
Flip-Flop (Latch) Clock Frequency (FO = 128)
55
MHz
Input Module Propagation Delays
tINYH
Pad to Y High
3.9
ns
tINYL
Pad to Y Low
3.9
ns
Input Module Predicted Routing Delays1, 3
tIRD1
FO=1 Routing Delay
1.1
ns
tIRD2
FO=2 Routing Delay
1.8
ns
tIRD3
FO=3 Routing Delay
2.6
ns
tIRD4
FO=4 Routing Delay
3.9
ns
tIRD8
FO=8 Routing Delay
8.1
ns
Notes:
1. 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.
2. Setup times assume fanout of 3. Further testing information can be obtained from the Timer utility.
3. Optimization techniques may further reduce delays by 0 to 4ns.
4. The hold time for the DFME1A macro may be greater than 0ns. Use the Designer software 3.0 (or later) Timer to check the hold
time for this macro.