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CD74HCT4051: TSSOP package

Part Number: CD74HCT4051
Other Parts Discussed in Thread: CD74HCT4053, CD74HC4051, MUX508


I was looking for the CD74HCT4051 in a TSSOP package, though it seems to only be available in PDIP and SOIC, while the CD74HC4051 (HC series) and the CD74HCT4053 comes in TSSOP.

Is there a technical or other reason why the HCT4051 is the sole family member not to come in TSSOP? Do you think it might become available in this package in the future?

  • Maigaard,

    My speculation of the package offering of the device is more to do with business demand at the time they designed it rather than a technical reason.

    Since this device was designed >20 years ago there will not be a reason to create a new package for it unless there was large demand and our newer devices couldn't cover that demand.

    What are you building that you need an 8:1 in a TSSOP package?

    What do you think about the newer MUX508 device?

    Thank you,
  • Hi Adam

    Thanks for helping.

    I guess you’re right that the package offering is related to business demands. I was just wondering why the 74HCT4051 doesn’t come in TSSOP, since I believe it’s still a rather popular device, and because most of it’s siblings, like the 74HC4051 and 74HCT4053, come in TSSOP.

    Thanks for pointing to the MUX508. It looks fine for the purpose, and comes in TSSOP. But I’m afraid it will be too costly, at about 8 times the price of the 4051. Also, the on-resistance of the 4051 is stated at about 45 ohms (@Vcc=5V, Vee=-5V), while it seems from figure 3 in the MUX508 datasheet that on-resistance could be as high as 600 ohms (@Vcc=5V, Vee=-5V). So I guess the 4051 is the best option for my specific application.

  • Peter,

    Sounds like a cool music project. Thank you for sharing.

    I agree with your analysis. At this time, with cost considerations, you are selecting the best option we have today.