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Could it possibly be? — Parallax Forums

Could it possibly be?

TD-LinuxTD-Linux Posts: 33
edited 2005-11-24 06:05 in General Discussion
While browsing the 2002 Parallax catalog in the SX section, I happened to come across a collage of SX chips. Nothing special, just a picture of a few dozen black plastic centipedes. Until I looked closer.... I have underlined the areas of interest in red.

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SX-Key + SX52 + Proto Board + SX-Key Software + Computer + USB to Serial Adapter + LED = Blinky LED!
sx2002.png
689 x 440 - 664K

Comments

  • BeanBean Posts: 8,129
    edited 2005-11-20 03:41
    For a brief time there was a 100MHz SX chip, but it didn't last very long. I beleive they were the same chip, just tested to work at 100MHz.
    Bean.

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    http://www.parallax.com/detail.asp?product_id=30012

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    http://www.parallax.com/detail.asp?product_id=30015

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    ·
  • Paul BakerPaul Baker Posts: 6,351
    edited 2005-11-20 19:32
    Bean is correct, the 100MHz parts were speed bin version of the same chip, speed higher than 75MHz can be used (XGS runs at 80MHz i believe), but additional cooling measures are either nessesaery or strongly recomended depending on the individual chip and frequency.

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    ·1+1=10
  • dkemppaidkemppai Posts: 315
    edited 2005-11-21 17:15
    TD-Linux said...
    While browsing the 2002 Parallax catalog in the SX section, I happened to come across a collage of SX chips. Nothing special, just a picture of a few dozen black plastic centipedes. Until I looked closer.... I have underlined the areas of interest in red.

    Yup, I remember them. I was rather surprised at the 100Mhz when it came out....
    ...Looking at the image, you see how much the·SX line has shrunk!

    -Dan
  • Dave PatonDave Paton Posts: 285
    edited 2005-11-21 17:19
    I've still got a couple of the SX52/100s, but I'm keeping them for myself for an as yet undisclosed super duper skunkworks project. Speeeeeeeed is addictive in the world of 8 bits. Very very addictive.

    cool.gif

    -dave

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    This is not a sig. This is a duck. Quack.
  • StephenStephen Posts: 53
    edited 2005-11-24 06:05
    Actually, the SX28AC100 that's shown in the picture was only sampled and never sold. The 2KB die just couldn't handle 100MHz very well... It needed a huge heat slug in the bottom of the package to run at that speed. The SX48/52 die was designed for the higher speeds, with tweaks to the program memory cells to get a bit more speed.

    I kept a bunch of SX28AC100's if anyone is ever interested in them. I know Farnell actually sold them at one time, but they shouldn't have as they they were only samples...

    Cheers,
    Stephen
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