J
Joerg
- Jan 1, 1970
- 0
Gents,
Have to drive a bucket full of 12V relays but the uC is only 3.3V. The
ULN2803 is touted as a driver for 5V TTL logic by most companies (like
TI) but datasheets hint that it can happily live down to around 3V drive
level. Is that kosher?
http://focus.ti.com/lit/ds/symlink/uln2803a.pdf
http://www.toshiba.com/taec/components2/Datasheet_Sync//393/22738.pdf
App note SLAA148 suggests it is kosher but ... I figure I'd better ask
the famous gurus in this here group
http://focus.ti.com/lit/an/slaa148/slaa148.pdf
A FET version would be nice as it gets the outputs lower but that's only
available from the more boutiquish suppliers. Demasiados Dolares, as usual.
Have to drive a bucket full of 12V relays but the uC is only 3.3V. The
ULN2803 is touted as a driver for 5V TTL logic by most companies (like
TI) but datasheets hint that it can happily live down to around 3V drive
level. Is that kosher?
http://focus.ti.com/lit/ds/symlink/uln2803a.pdf
http://www.toshiba.com/taec/components2/Datasheet_Sync//393/22738.pdf
App note SLAA148 suggests it is kosher but ... I figure I'd better ask
the famous gurus in this here group
http://focus.ti.com/lit/an/slaa148/slaa148.pdf
A FET version would be nice as it gets the outputs lower but that's only
available from the more boutiquish suppliers. Demasiados Dolares, as usual.