

Overview
The FSUSB31K8X is an analog Switches, Multiplexer made by onsemi in a US-8 package with 8 pins. -40℃~+85℃ 1 12ns 15ns 250ps 2:1 3.7pF 3V~4.3V 6.5Ω 720MHz US-8 Analog Switches, Multiplexers ROHS.
PCBKit's library has its KiCad symbol (EasyEDA_Cloud:FSUSB31K8X, from EasyEDA) and its footprint (EasyEDA_Cloud:US-8_L2.1-W2.4-P0.50-LS3.2-BL, from EasyEDA), ready for a KiCad board. JLCPCB lists it (part C184088). 2 open-source boards in 2 repositories on GitHub use it.
Symbol
Footprint
Parameters
11- Bandwidth
- 720MHz
- Con
- 3.7pF
- Features
- Fault protection, Power-off isolation
- Number of Channels
- 1
- Operating Temperature
- -40℃~+85℃
- Propagation Delay (tpd)
- 250ps
- Ron
- 6.5Ω
- Switch Circuit
- 2:1
- Turn-off time
- 12ns
- Turn-on time
- 15ns
- Voltage - Supply
- 3V~4.3V
Order codes
1- FSUSB31K8XLCSC C184088
Pinout
8| Pin | Name | Type |
|---|---|---|
| 1 | NC | Unspecified |
| 2 | HSD | Unspecified |
| 3 | D- | Unspecified |
| 4 | GND | Unspecified |
| 5 | D+ | Unspecified |
| 6 | HSD+ | Unspecified |
| 7 | OE# | Unspecified |
| 8 | VCC | Unspecified |
Open-source boards using it
All 2- 2 layers100 × 100 mm

- 2 layers100 × 160 mm

Pcb kicad
hmaerki/experiment_microoctopus
Ideas on how to set up a micropython testenvironment
67 parts2MIT
Show this part on your page
<iframe src="https://pcbkit.io/embed/parts/onsemi/FSUSB31K8X" title="FSUSB31K8X in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe><img src="https://pcbkit.io/embed/parts/onsemi/FSUSB31K8X.jpg" alt="FSUSB31K8X" width="1200" height="900">[](https://pcbkit.io/parts/onsemi/FSUSB31K8X)Questions
Is there a KiCad symbol and footprint for the FSUSB31K8X?
Yes. The symbol is EasyEDA_Cloud:FSUSB31K8X and the footprint EasyEDA_Cloud:US-8_L2.1-W2.4-P0.50-LS3.2-BL, both drawn on this page. PCBKit places them on a board for you when you design with it.
What package is the FSUSB31K8X?
US-8, with 8 pins. Its footprint is drawn on this page.
Where is the FSUSB31K8X datasheet?
onsemi publishes it: the Datasheet link on this page opens it.
Where can I order the FSUSB31K8X?
JLCPCB lists it as part C184088, with 0 in stock; the sellers' links on this page open their listings.
What can replace the FSUSB31K8X?
Parts like it in the library: the NL7WB66USG by onsemi and the 7WBD3125US by onsemi. Check their datasheets: a part that fits the footprint may still differ in its ratings.
Which open-source boards use the FSUSB31K8X?
2 boards in 2 repositories on GitHub; the most starred are listed on this page, with their KiCad files.
Parts like it
2NL7WB66USG
US-8-55℃~+125℃ 1.65V~5.5V 10pF 180MHz 1:1 250ps 3.9ns 5Ω 6.3ns US-8 Analog Switches, Multiplexers ROHSonsemiAnalog Switches, Multiplexers7WBD3125US
VFSOP-8-2.3mm-55℃~+125℃ 10pF 2 250ps 4V~5.5V 7Ω Power-off isolation、Glitch-free switching VFSOP-8-2.3mm Analog Switches, Multiplexers ROHSonsemiAnalog Switches, Multiplexers