An engineer in wonderland – Son* of 555?

Reminiscent of the very best analogue apps notes, the data sheet for Linear Tech’s rather interesting LTC6992 six pin oscillator/PWM includes a delightful collection of circuits.

I particularly like the Wide Range LED Dimming (0 to 85000 Cd/m2 Brightness – page 29), even though I have still to fathom how control transfers between the two control circuits.

The 6992 is part of a neat little cluster of six pin temporal building blocks, called TimerBlox, that rely on silicon rather than capacitors to set periods.

I feel, at last, there is a worthy successor to Hans Camenzind’s venerable 555 within this family.


* Daughter? 

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  1. I’ve heard about AMS too. For whatever reason, my suppliers have trended towards the Melexis part. Remarkable parts, both of them! They are coming close to replacing resolvers in moderately precise applications.

  2. Nice to hear from you again Mr Kurt.
    For rotary encoders, austriamicrosystems – a rather nice independent with its own fab – does an impressive range of magnetically sensitive chips.

  3. pretty cool! Certainly a contender for the title of “the offspring of 555”.
    In my daily job, I work with sensors for earthmoving equipment. Many use a pwm output format, and this would be a handy way to implement it (for apps where calibration wasn’t required).
    Of course, a lot of sensors have gone to hall cells, and more than a few of these have an incredible array of features. The Melexis 90316 is a good example… 12 bits of precision, calibration, choice of output formats, etc.
    thanks for the news on this. I doubt I would have stumbled across it otherwise.

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