A C T
™
1 Seri es FP GA s
Timing Derating
A best case timing derating factor of 0.45 is used to reflect
best case processing. Note that this factor is relative to the
“standard speed” timing parameters, and must be multiplied
by the appropriate voltage and temperature derating factors
for a given application.
Timin g Der at ing Factor (T em p era tur e a nd Vol ta g e )
Industrial
Min.
(Commercial Minimum/Maximum Specification) x
0.69
Max.
1.11
Min.
0.67
Military
Max.
1.23
Timin g Der at ing Factor for D es ig ns at Ty p ica l T em p er at u r e (T
J
= 2 5° C) and
Vo lt age (5. 0 V)
(Commercial Maximum Specification) x
0.85
Te mper ature and V ol tage D er ati ng Fa cto rs
(n o rma lized to Wors t - Cas e C omme rci al, T
J
= 4 .7 5 V, 70° C)
–55
4.50
4.75
5.00
5.25
5.50
0.75
0.71
0.69
0.68
0.67
–40
0.79
0.75
0.72
0.69
0.69
0
0.86
0.82
0.80
0.77
0.76
25
0.92
0.87
0.85
0.82
0.81
70
1.06
1.00
0.97
0.95
0.93
85
1.11
1.05
1.02
0.98
0.97
125
1.23
1.16
1.13
1.09
1.08
Junction Temperature and Voltage Derating Curves
(normalized to Worst-Case Commercial, T
J
= 4.75 V, 70°C)
1.3
1.2
1.1
1.0
0.9
0.8
0.7
0.6
4.50
4.75
5.00
Voltage (V)
Note:
This derating factor applies to all routing and propagation delays.
5.25
5.50
25°C
0°C
–40°C
–55°C
Derating Factor
125°C
85°C
70°C
1-293
ACTEL [ Actel Corporation ]
