L
Lewin A.R.W. Edwards
- Jan 1, 1970
- 0
I'm having difficulty finding a surface-mount replacement for the
venerable ULN2803 (octal Darlington driver, 50V max, 500mA per driver,
clamp diodes included). The application is low-speed stepper motor
driving.
I found the Texas Instruments ULN2803ADWR, but the documentation for
it has me thoroughly confused. Digi-Key says it's an 18 SOIC but has
no drawing or datasheet. The datasheet from TI shows a DIP package in
both the pinout and mech drawings, but the description table shows
"SOIC (DW)". Going to TI's packaging info page at
<http://www.ti.com/sc/docs/psheets/mechanic/D.htm> shows they don't
even have an 18-SOIC package!
Can anyone clarify the actual dimensions of TI's part? I don't want to
make boards with the wrong land pattern.. been there, done that.
Or can someone suggest a replacement? I'm actually only switching
about 110mA of load but the extra is nice to have; I don't want to go
below 250mA per channel capability.
venerable ULN2803 (octal Darlington driver, 50V max, 500mA per driver,
clamp diodes included). The application is low-speed stepper motor
driving.
I found the Texas Instruments ULN2803ADWR, but the documentation for
it has me thoroughly confused. Digi-Key says it's an 18 SOIC but has
no drawing or datasheet. The datasheet from TI shows a DIP package in
both the pinout and mech drawings, but the description table shows
"SOIC (DW)". Going to TI's packaging info page at
<http://www.ti.com/sc/docs/psheets/mechanic/D.htm> shows they don't
even have an 18-SOIC package!
Can anyone clarify the actual dimensions of TI's part? I don't want to
make boards with the wrong land pattern.. been there, done that.
Or can someone suggest a replacement? I'm actually only switching
about 110mA of load but the extra is nice to have; I don't want to go
below 250mA per channel capability.