
RS485 hardware
BatteryTesterEngineering/Neware_RS485
Neware BTS4000 series battery cyclers RS485 communication protocol, reverse engineered

The SP3077EEN-L is a RS 485 , RS 422 IC made by MaxLinear in a SOIC-8 package with 8 pins. -40℃~+85℃ 1 1 16Mbps 3.3V Transceiver SOIC-8 RS-485 / RS-422 ICs ROHS.
PCBKit's library has its KiCad symbol (EasyEDA_Cloud:ADM3077EARZ-REEL-TUDI, from EasyEDA) and its footprint (Package_SO:SOIC-8_3.9x4.9mm_P1.27mm, from KiCad's library), ready for a KiCad board. JLCPCB lists it (part C1543748). 1 open-source board in 1 repository on GitHub use it.
| Pin | Name | Type |
|---|---|---|
| 1 | VCC | Unspecified |
| 2 | RO | Unspecified |
| 3 | DI | Unspecified |
| 4 | GND | Unspecified |
| 5 | Y | Unspecified |
| 6 | Z | Unspecified |
| 7 | B | Unspecified |
| 8 | A | Unspecified |

BatteryTesterEngineering/Neware_RS485
Neware BTS4000 series battery cyclers RS485 communication protocol, reverse engineered
<iframe src="https://pcbkit.io/embed/parts/maxlinear/SP3077EEN-L" title="SP3077EEN-L in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe><img src="https://pcbkit.io/embed/parts/maxlinear/SP3077EEN-L.jpg" alt="SP3077EEN-L" width="1200" height="900">[](https://pcbkit.io/parts/maxlinear/SP3077EEN-L)Yes. The symbol is EasyEDA_Cloud:ADM3077EARZ-REEL-TUDI and the footprint Package_SO:SOIC-8_3.9x4.9mm_P1.27mm, both drawn on this page. PCBKit places them on a board for you when you design with it.
SOIC-8, with 8 pins. Its footprint is drawn on this page.
MaxLinear publishes it: the Datasheet link on this page opens it.
JLCPCB lists it as part C1543748, with 0 in stock; the sellers' links on this page open their listings.
Parts like it in the library: the SP3485EN-L/TR by MaxLinear, the SP485EEN-L/TR by MaxLinear, the SN75176BD by Texas Instruments and the MAX485ESA+T by Maxim Integrated (Analog Devices). Check their datasheets: a part that fits the footprint may still differ in its ratings.
1 board in 1 repository on GitHub; the most starred are listed on this page, with their KiCad files.