• Old Chips Found During Cleanup

    11/08/2025 at 16:51 • 0 comments

    Amazing how you can have spare parts sit in draws for 25 years untouched. I'm a fan of AMD so I was excited to find two of these are from them. I'm wishing I had a better microscope to de-cap and view the die. I'll have to figure out how to see if Evil Monkeyz Designz is interested in any of these for a de-capping.

    Parts Shown Below: 

    M27C1001 - 1 Mbit UV EPROM
AM27C010 - 1 Mbit UV CMOS EPROM
AM27C512 - 512 Kbit UV CMOS EPROM
AT89C55  - 8-Bit Microcontroller with 20KByte Flash


  • S19254 - NPN Transistor, OldParts

    04/02/2023 at 18:35 • 0 comments

    Summary:

    The S19254 appears to be a high gain NPN transistor.

    • Package: ?
    • Vce = 60V ?

    Performance Measurements:

    Performance measurements taken at different operating points. Approximately 18 degrees Celsius.

    Package Measurements:

    Pins were confirmed with meter and in circuit testing.

    See image above.

  • CDQ10656 - NPN Transistor, OldParts

    04/02/2023 at 16:04 • 0 comments

    Summary:

    The CDQ10656 is a medium gain NPN transistor. Based on limited literature.

    • Package: TO-5 | TO-39
    ParameterValueUnit
    Vce
    		60V
    Veb6V
    Ic1A

    Performance Measurements:

    Performance measurements taken at different operating points. Approximately 18 degrees Celsius.

    Package Measurements:

    Pins were confirmed with meter and in circuit testing.