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Visitor II
September 10, 2025
Solved

Chain STPM33 Clock

  • September 10, 2025
  • 1 reply
  • 275 views

Hello,

is it possible to cascade multible STPM33 Chips? 

That means SPTM33 + Crystal as master -> two STPM33 CLKIN

-> Last CLKOUT -> two STPM33 CLKIN

 

Screenshot 2025-09-10 140729.png

Best answer by Didier HERROUIN

Dear Dominik_GUDE,

You can cascade 2 STPM3x maximum.

Indeed, from 3 chipsets in cascade, the clock shape becomes deteriorated, especially the duty cycle which is too far from original 50%.

Best regards,

Didier Herrouin

1 reply

Didier HERROUIN
Didier HERROUINBest answer
ST Technical Moderator
April 3, 2026

Dear Dominik_GUDE,

You can cascade 2 STPM3x maximum.

Indeed, from 3 chipsets in cascade, the clock shape becomes deteriorated, especially the duty cycle which is too far from original 50%.

Best regards,

Didier Herrouin

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