-Original content, please do not reprint.
purchasing agent often get the wrong package or wrong part when purchasing， TI's 74 series components. This is because the naming rules of the Product Number are not thorough enough. The following table can solve many of your problems.
As usual, let’s go to the picture first. The first row is standard. 54 is military device. 74 is commercial device. The second column is series. The third row is product characteristics. If there is no mark, it means the product has no special characteristics. The fourth row is The fifth line is the bit width and size. The sixth line is the function. The seventh line is the revision of the device. It has A-Z. If it is blank, it means there is no revision. The eighth line is the package. The last one is the outer packaging.
SN74 ABTH 162 244 A DGG R
• Let’s analyze it first: SN74 is a commercial series device. ABT belongs to the ABT series. The H bus has Bus-Hold functional characteristics. A component of 16 bits in size 2 represents the second type of operation port 244. Function, the revision of A device is A. If it is blank, it means there is no revision. DGG corresponds to TSSOP package. R means tape and reel.
SN74 LV C 1G 3 157DCKR
• Let’s take another model to analyze. SN74 is a commercial series device. LV belongs to series C and has the special function of C= Configurable Vcc. It is a component with a bit width of 1G, 3 Category 3 operation type, 157 is the function, and DCK corresponds to our SOT. Package, R means tape and reel.
SN74 LVC 1G 08 D CK R
• By comparing this table, you can find that some places can be left blank. Our example below has a blank area.There should be an operation port here, but our model does not have this, it has no blank.
SN74LVC2G08DCUR
• This model is very close to the model above, except that one is 2G and the other is 1g.
Be familiar with the naming rules of the chips. In addition to avoiding taking the wrong goods, the key can quickly find alternative products when the stock is out.
