• TI Thinks Resolved

SN74HCS74-Q1: HCS technology family

Part Number: SN74HCS74-Q1


my customer is currently working on a project and he plans to use our SN74HCS74-Q1 and SN74HCS30-Q1 devices; however he is not very familiar with the HCS technology family and he has a couple of questions:

  • in the datasheet he finds no information about the interesting levels (max. Low / high levels etc.) over temperature; can this be provided for the devices above?
  • Does anything speak against having HCS and other logic families like LVC for example in the same system?
  • Is this new technology good for automotive applications? 

Best regards,


  • The minimum/maximum electrical characteristics in the datasheet are specified over the full temperature range. What are the "interesting levels" that are missing?

    All CMOS logic families at the same supply voltage are compatible with each other.

    All HCS devices are automotive qualified. Point him to the HCS application report, which says:

    System designers are continuously striving to improve signal integrity, reduce power, and increase robustness in Automotive, Industrial, Personal Electronics, and other electronic systems. The Texas Instruments™ (TI) next-generation Schmitt-trigger Integrated High-speed CMOS family was designed to achieve these goals. This 2 to 6-V Logic family was developed to improve digital signal integrity in systems that are affected by noise inherent to the environment it is in. The integration of Schmitt-triggers to all inputs eliminates a majority of the issues seen with logic devices that stem from normal CMOS inputs. HCS accomplishes all this while maintaining a low power consumption.