Shop OBEX P1 Docs P2 Docs Learn Events
Uln2803 — Parallax Forums

Uln2803

GuidoGuido Posts: 195
edited 2006-12-20 02:21 in General Discussion
I am looking for the lowest input triggering voltage for a ULN2803, switching output of 5 vdc.

Thanks Guido

Comments

  • BenoitBenoit Posts: 47
    edited 2006-12-20 00:53
    Guido,

    The datasheet for the ULN2803 shows it as a TTL level device, CMOS 5V compatible. The following web page shows the thresholds for different types of devices.

    www.interfacebus.com/voltage_threshold.html

    If I read this right, switching from 0v to high, the trigger should occur around 1.5 to 2 v.

    -Ben
  • GuidoGuido Posts: 195
    edited 2006-12-20 02:21
    Thank You,

    I was worried I could not do a 5 vdc input and a supply output of 5vdc.

    Thanks Again
Sign In or Register to comment.