
CompactBeamspringP2
purdeaandrei/CompactBeamSpring
Compact Beamspring Controller, based on the TH Xwhatsit design
Texas InstrumentsExtended
-18V~-1V、1V~18V -40℃~+125℃ 1.3us 1.3us 25nA 2V~36V 2mV 36V 3nA 800uA Four channels Open Collector Rail-to-rail input TTL、CMOS SOIC-14 Comparators ROHS
The LM339AD is a comparator made by Texas Instruments in a SOIC-14 package with 14 pins. -18V~-1V、1V~18V -40℃~+125℃ 1.3us 1.3us 25nA 2V~36V 2mV 36V 3nA 800uA Four channels Open Collector Rail-to-rail input TTL、CMOS SOIC-14 Comparators ROHS.
PCBKit's library has its KiCad symbol (Comparator:LM339, from KiCad's library) and its footprint (Package_SO:SOIC-14_3.9x8.7mm_P1.27mm, from KiCad's library), ready for a KiCad board. 13,039 are in stock at JLCPCB (part C74559). 3 open-source boards in 2 repositories on GitHub use it.
| Pin | Name | Type |
|---|---|---|
| 1 | — | Open collector |
| 2 | — | Open collector |
| 3 | V+ | Power in |
| 4 | - | Input |
| 5 | + | Input |
| 6 | - | Input |
| 7 | + | Input |
| 8 | - | Input |
| 9 | + | Input |
| 10 | - | Input |
| 11 | + | Input |
| 12 | V- | Power in |
| 13 | — | Open collector |
| 14 | — | Open collector |

purdeaandrei/CompactBeamSpring
Compact Beamspring Controller, based on the TH Xwhatsit design

purdeaandrei/SMDModelFController
Model F controller, supports F AT, F122, F Unsaver, and "Blue Switch" keyboards.

purdeaandrei/CompactBeamSpring
Compact Beamspring Controller, based on the TH Xwhatsit design
Yes. The symbol is Comparator:LM339 and the footprint Package_SO:SOIC-14_3.9x8.7mm_P1.27mm, both drawn on this page. PCBKit places them on a board for you when you design with it.
SOIC-14, with 14 pins. Its footprint is drawn on this page.
Texas Instruments publishes it: the Datasheet link on this page opens it.
JLCPCB lists it as part C74559, with 13,039 in stock; the sellers' links on this page open their listings.
Parts like it in the library: the LM339D by Texas Instruments, the LM339DT by STMicroelectronics, the LM239D by Texas Instruments and the LM339 by Jiangsu Changjing Electronics Technology (CJ). Check their datasheets: a part that fits the footprint may still differ in its ratings.
3 boards in 2 repositories on GitHub; the most starred are listed on this page, with their KiCad files.