SMJ320LC549 Datasheet, PDF (22/52 Pages) Texas Instruments – FIXED-POINT DIGITAL SIGNAL PROCESSOR

SMJ320LC549
FIXEDĆPOINT DIGITAL SIGNAL PROCESSOR
SGUS032B – OCTOBER 2002 – REVISED MAY 2003
I/O timing variation with load capacitance: SPICE simulation results
Condition: Temperature : 125° C
Capacitance : 0–100pF
Voltage
: 2.7/3.0/3.3 V
Model
: Weak/Nominal/Strong
0 pF
10 pF
20 pF
30 pF
40 pF
50 pF
60 pF
70 pF
80 pF
90 pF
100 pF
0 pF
10 pF
20 pF
30 pF
40 pF
50 pF
60 pF
70 pF
80 pF
90 pF
100 pF
90%
10%
Figure 9. Rise and Fall Time Diagram
Table 1. Timing Variation With Load Capacitance: [2.7 V] 10% – 90%
WEAK
RISE
FALL
0.476 ns
0.457 ns
1.511 ns
1.278 ns
2.551 ns
2.133 ns
3.614 ns
3.011 ns
4.664 ns
3.899 ns
5.752 ns
4.786 ns
6.789 ns
5.656 ns
7.817 ns
6.598 ns
8.897 ns
7.531 ns
10.021 ns
8.332 ns
11.072 ns
9.299 ns
NOMINAL
RISE
FALL
0.429 ns
0.391 ns
1.386 ns
1.148 ns
2.350 ns
1.956 ns
3.327 ns
2.762 ns
4.394 ns
3.566 ns
5.273 ns
4.395 ns
6.273 ns
5.206 ns
7.241 ns
6.000 ns
8.278 ns
6.928 ns
9.152 ns
7.735 ns
10.208 ns
8.537 ns
STRONG
RISE
FALL
0.382 ns
0.323 ns
1.215 ns
1.049 ns
2.074 ns
1.779 ns
2.929 ns
2.512 ns
3.798 ns
3.264 ns
4.655 ns
4.010 ns
5.515 ns
4.750 ns
6.442 ns
5.487 ns
7.262 ns
6.317 ns
8.130 ns
7.066 ns
8.997 ns
7.754 ns
Table 2. Timing Variation With Load Capacitance: [3 V] 10% – 90%
WEAK
RISE
FALL
0.436 ns
0.387 ns
1.349 ns
1.185 ns
2.273 ns
1.966 ns
3.226 ns
2.765 ns
4.168 ns
3.573 ns
5.110 ns
4.377 ns
6.033 ns
5.230 ns
7.077 ns
5.997 ns
8.020 ns
6.899 ns
8.917 ns
7.709 ns
9.885 ns
8.541 ns
NOMINAL
RISE
FALL
0.398 ns
0.350 ns
1.240 ns
1.064 ns
2.098 ns
1.794 ns
2.974 ns
2.539 ns
3.849 ns
3.292 ns
4.732 ns
4.052 ns
5.660 ns
4.811 ns
6.524 ns
5.601 ns
7.416 ns
6.336 ns
8.218 ns
7.124 ns
9.141 ns
7.830 ns
STRONG
RISE
FALL
0.345 ns
0.290 ns
1.092 ns
0.964 ns
1.861 ns
1.634 ns
2.637 ns
2.324 ns
3.406 ns
3.013 ns
4.194 ns
3.710 ns
5.005 ns
4.401 ns
5.746 ns
5.117 ns
6.559 ns
5.861 ns
7.323 ns
6.498 ns
8.101 ns
7.238 ns
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