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Forum Pinout of SMD 2520 crystals from Multicomp Pro
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Related

Pinout of SMD 2520 crystals from Multicomp Pro

anonymous_engineer_8hflg
anonymous_engineer_8hflg over 3 years ago

Element14 lists some multicomp pro branded crystals in 4 pin packages.  The datasheet describes them like they are passive crystals, specifying shunt/load capacitance and ESR.

The datasheet includes package drawings and model numbers, but no pinout information.  One of these is model MCSJK-7E-32.00-10-30-60-B-30.

Is the pinout for that series the same pin 1 + pin 3 pinout as in the SMD3225 crystals, also from multicomp pro.  The somewhat similar Murata crystal datasheet specifies pinout and quality test procedures, but forgets to specify if their pinout drawing is top view or bottom view.

Or is the pinout the same pin 1 + pin 4 pinout as in 32.767 kHz crystals from Rami Technology?

In either case, actual pinout information is needed to use these parts PCB design for products.

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  • Gough Lui
    Gough Lui over 3 years ago +4
    I've not ever used those crystals, however, most 2520 crystal packages (i.e. not oscillators) use pin 1 and pin 3 diagonally across from each other (top view, anticlockwise numbering starting bottom left…
  • Gough Lui
    0 Gough Lui over 3 years ago

    I've not ever used those crystals, however, most 2520 crystal packages (i.e. not oscillators) use pin 1 and pin 3 diagonally across from each other (top view, anticlockwise numbering starting bottom left).

    In fact, the Rami Technology R2520 has a Pin 1/3 arrangement -

    image

    SJK Crystal also lists Pin 1-3.

    In fact, the datasheet for the Multicomp Pro product you claim has no pinout information MCSJK-7E-32.00-10-30-60-B-30 also implies Pin 1-3 connection:

    image

    So I think it's fairly safe to assume that it is 1-3 connection.

    - Gough

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  • phoenixcomm
    0 phoenixcomm over 3 years ago

    look at

    www.farnell.com/.../2864165.pdf

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  • anonymous_engineer_8hflg
    0 anonymous_engineer_8hflg over 3 years ago in reply to Gough Lui

    That vague drawing (no connection lines between crystal symbol and pins) is the reason I had to ask, this is a bad job by the datasheet author, especially for an element14 house brand where the Farnell webshop is essentially the manufacturer "main catalog"/databook

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  • Jan Cumps
    0 Jan Cumps over 3 years ago in reply to anonymous_engineer_8hflg

    It's common in other manufacturer's data sheets too. Many of them use that same style to draw this package.

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  • Prasanth Arockiaraj
    0 Prasanth Arockiaraj over 3 years ago in reply to Gough Lui

    It is Pin 1 and 3 from the top.

    Please review the Diagram section in the datasheet.

    https://www.farnell.com/datasheets/2864165.pdf

    image

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