Logic product naming conventions
Below is a fictional example using all designators in the correct order.
Descriptions of each designator follows in the Quick Reference
and Detailed Reference
|| Required (Always Present)
|| Optional (Present Only When Relevant)
N: Indicates commercial temperature range for the FAST product family.
I: Indicates industrial temperature range for the FAST product family.
74: Indicates the device is either commercial or industrial grade.
Note: No designator is used for HEF4000 devices.
For a complete list of the available logic product families, please visit our Products section.
TTL Voltage Level:
T: Indicates TTL switching levels on HC and AHC devices. When no designator is present on HC and AHC devices, this indicates CMOS switching levels.
Note: For ABT, ALVC, ALVT, FAST, LV, LVC, LVT, MB, and PDI families, TTL switching levels are standard. Consequently, no TTL designator is used for these families.
H: Indicates the presence of the bus hold feature on ABT(16), AVC, ALVC, and LVC(16) devices. On these devices bus hold capability is optional.
Note: Bus hold is standard on LVT and ALVT bus interface devices. Consequently, no bus hold designator is used.
1G, 2G, 3G: Indicates single-, dual-, and triple-gate devices.
blank: Indicates the device falls within the 8-bit range (the range includes 1, 2, 3, 4, 6, 8, 9, and 10 bit devices). 8-bit devices are offered in the ABT, ALVC, FAST, HC/T, HEF4000, LV, LVC, and LVT families.
16: Indicates the device falls within the 16-bit range (the range includes 16, 18, and 20 bit devices). 16-bit devices are offered in the ABT, ALVC, AVC, LVC, and LVT families.
32: Indicates the device falls within the 32-bit range (the range includes 32, and 36 bit devices). 32-bit devices are offered in the ALVC and LVC families.
2: Indicates the presence of optional output series termination. This option is available in the ABT, ALVC, LVC, and LVT families.
For a complete list of the available functions please visit our Products page.
A, B, C, etc.: Please check your part's datasheet to determine the meaning of the associated designator for this field.
-1: Indicates the presence of terminations resistors for products in the FAST family.
In North America, the following additional designators may be added to the end of the product name:
- -T Standard Tape and Reel Packing Method
- -R Reversed Package Orientation Tape and Reel Packing Method
- -G Smaller Tape and Reel Packing Method
- -H Rotated Package Orientation Smaller Tape and Reel Packing Method
- -S Single Tray Packing Method