PCB Parts sourcing

(A) The complete device type includes the body type, prefix, suffix, package, foot spacing, error, material, etc. Device prefixes are extensive series of devices, so prefixes are less common, but suffixes are more common.
The type suffix, for example, has the following uses:
For instance, MAXIM’s reset chip MAX706 is also 706, and the suffixes “S” and “T” represent different threshold voltages. The threshold voltage of MAX706S is 2.93V, and the threshold voltage of MAX706T is 3.08V.

(B) Distinguish device grades and operating temperatures. For example, the benchmark voltage chip TL431 of TI Company, TL431C, represents the device’s operating temperature from 0 degrees to 70 degrees (civil grade), and TL431I represents the device’s operating temperature from -40 degrees to 85 degrees (industrial grade). The suffixes “C” and “I” represent different operating temperatures.

(C) Differentiating device packaging forms Take TL431 as an example. TL431CP represents PDIP packaging, TL431CD represents SOIC packaging, and the suffix “P” and “D” represent different packaging.

(D) Distinguish the way of ordering the benchmark voltage chip TL431 CD of TI company. If the requirement is to purchase by disk (2500PCS/ disk), then the model of TL431 CDR must be ordered, and the suffix “R” here stands for the disk. Otherwise, if you order according to TL431 CD, you may buy materials packed in tubes (75PCS/ tube).

(E) Distinguish between lead-free and lead-free—for example, ON Company’s comparator chip LM393D (“D “means SOIC package). If you want to use the lead-free model, you must place an order according to LM393DG.