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 sections.

	Required (Always Present)
	Optional (Present Only When Relevant)

	Temperature Range For FAST parts, "N" = Commercial and "I" = Industrial
	Temperature Range "74" = Commercial or industrial (not used on HEF4000)
	Family Designators indicate the device family
	TTL Voltage Level "T" = Optional TTL is enabled
	Bus Hold "H" = Optional bus hold included
	Bit Width Designators indicate bit width ("blank" = 8-bit range)
	Output Termination "2" = Optional output series termination present
	Function Designators indicate the device function
	Device Version Designators usually indicate a revision or new version
	Termination Resistors "-1" = Termination resistors for FAST parts
	Package Designators indicate the device package

1. Temperature Range:
   N: Indicates commercial temperature range for the FAST product family.
   I: Indicates industrial temperature range for the FAST product family.

2. Temperature Range:
   74: Indicates the device is either commercial or industrial grade.
   Note: No designator is used for HEF4000 devices.

3. Family:
   For a complete list of the available logic product families, please visit our Products section.

4. 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.

5. Bus Hold:
   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.

6. Bit Width:
   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.

7. Output Termination:
   2: Indicates the presence of optional output series termination. This option is available in the ABT, ALVC, LVC, and LVT families.

8. Function:
   For a complete list of the available functions please visit our Products page.

9. Device Version:
   A, B, C, etc.: Please check your part's datasheet to determine the meaning of the associated designator for this field.

10. Termination Resistors:
    -1: Indicates the presence of terminations resistors for products in the FAST family.

11. Package:
    For a complete list of available ICs packages and designators, please visit our Package Outline Drawings page.

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