Question 9.45: Give a comparison of logic families in tabular form....
Give a comparison of logic families in tabular form.
Step-by-Step
Table 9.1 Comparison of IC Logic Types
| TTL | N-MOS and P-MOS |
|||||||||||||
| DTL | RTL | HTL | 74 | 74H | 74L | 74S | 74AS | 74LS | 74ALS | ECL | CMOS | I²L | ||
| Propagation | * 10 | |||||||||||||
| delay time (ns) | 30 | 12 | 119 | 10 | 6 | 33 | 3 | 1.5 | 9 | 4 | 50 to 2 | 100 | to 25 | 250 |
| Power dissipation per gate (mW) | 15 | 15 | 50 | 10 | 22.5 | 1 | 20 | 20 | 2 | 1 | 25 | 0.25 | 10 nW | *6 nW to 70 μW |
| Noise margin (V) | 1.4 | 0.7 | 7.5 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.25 | 2 | 0.3 V_{DD} | 0.25 |
| Noise immunity rating | good | poor | excellent | good | good | good | good | good | good | good | fair | excellent | excellent | fair |
| Fan-out | 8 | 5 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 25 | >50 | >50 | * depends upon injection current |
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(See Fig. 9.34 next page)