
TeleprinterHat
MattisLind/teleprinterHat
A RaspberryPi HAT that interfaces a old school teleprinter

The FMMT597 is a bipolar made by Diodes Incorporated in a SOT-23 package with 3 pins. -55℃~+150℃ 100 1nA 200mA 250mV 300V 500mW 75MHz PNP SOT-23 Bipolar (BJT) ROHS.
PCBKit's library has its KiCad symbol (Transistors:PNP B1 E2 C3, from CERN's library) and its footprint (Package_TO_SOT_SMD:SOT-23, from KiCad's library), ready for a KiCad board. JLCPCB lists it (part C5245509). 2 open-source boards in 2 repositories on GitHub use it.
| Pin | Name | Type |
|---|---|---|
| 1 | B | Passive |
| 2 | E | Passive |
| 3 | C | Passive |

MattisLind/teleprinterHat
A RaspberryPi HAT that interfaces a old school teleprinter

<iframe src="https://pcbkit.io/embed/parts/diodes/FMMT597" title="FMMT597 in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe><img src="https://pcbkit.io/embed/parts/diodes/FMMT597.jpg" alt="FMMT597" width="1200" height="900">[](https://pcbkit.io/parts/diodes/FMMT597)Yes. The symbol is Transistors:PNP B1 E2 C3 and the footprint Package_TO_SOT_SMD:SOT-23, both drawn on this page. PCBKit places them on a board for you when you design with it.
SOT-23, with 3 pins. Its footprint is drawn on this page.
Diodes Incorporated publishes it: the Datasheet link on this page opens it.
JLCPCB lists it as part C5245509, with 0 in stock; the sellers' links on this page open their listings.
Parts like it in the library: the S8050 by YONGYUTAI, the S8550 by YONGYUTAI, the 8550M-D by Foshan Blue Rocket Elec and the SS8550 by MSKSEMI. Check their datasheets: a part that fits the footprint may still differ in its ratings.
2 boards in 2 repositories on GitHub; the most starred are listed on this page, with their KiCad files.