CHAPTER 5 ■ NUMBERS AND UNITS
However, as part sizes shrink, less space is available to print the component values directly on the part.
Manufacturers employ a few tricks to squeeze in the most vital information.
Guessing Missing Units
When specifying a value, normally the units must not be omitted. 200 doesn’t mean much. Is that 200 W
(ohms) or 200 V (volts) or 200 F (farads) or 200 A (amps)? I don’t want to touch three out of four of those.
If the units are missing from a small part (see Figure 5-5), you can make an educated guess based on the
type of part (see Table 5-3).
Figure 5-5. Missing multiplier and units (should be 4.9152 MHz)
Figure 5-4. A part with plenty of room for a descriptive label