

Overview
The SY89540UMY is a signal Switches , Encoders & Decoders , Multiplexer made by Microchip Technology in a QFN-44-EP(7x7) package with 45 pins. -40℃~+85℃ 2.375V~2.625V 380ps Single Supply QFN-44-EP(7x7) Signal Switches, Multiplexers, Decoders ROHS.
PCBKit's library has its KiCad symbol (Analog & Interface:SY89540U, from CERN's library) and its footprint (ICs And Semiconductors SMD:QFN50P700X700X100-45N-S340, from CERN's library), ready for a KiCad board. 22 are in stock at JLCPCB (part C633592). 1 open-source board in 1 repository on GitHub use it.
Symbol
Footprint
Parameters
4- Operating temperature
- -40℃~+85℃
- Propagation Delay
- 380ps
- Voltage - Supply
- 2.375V~2.625V
- Voltage Supply Source
- Single Supply
Order codes
1- SY89540UMYLCSC C633592
Pinout
45| Pin | Name | Type |
|---|---|---|
| 1 | VREF_AC2 | Output |
| 2 | IN2 | Input |
| 3 | VT2 | Input |
| 4 | IN2 | Input |
| 5 | CONFIG | Input |
| 6 | VCC | Power in |
| 7 | LOAD | Input |
| 8 | IN1 | Input |
| 9 | VT1 | Input |
| 10 | IN1 | Input |
| 11 | VREF_AC1 | Output |
| 12 | GND | Power in |
| 13 | GND | Power in |
| 14 | VREF_AC0 | Output |
| 15 | IN0 | Input |
| 16 | VT0 | Input |
| 17 | IN0 | Input |
| 18 | SIN0 | Input |
| 19 | SIN1 | Input |
| 20 | GND | Power in |
| 21 | GND | Power in |
| 22 | VCC | Power in |
| 23 | Q0 | Output |
| 24 | Q0 | Output |
| 25 | VCC | Power in |
| 26 | Q1 | Output |
| 27 | Q1 | Output |
| 28 | VCC | Power in |
| 29 | Q2 | Output |
| 30 | Q2 | Output |
| 31 | VCC | Power in |
| 32 | Q3 | Output |
| 33 | Q3 | Output |
| 34 | VCC | Power in |
| 35 | GND | Power in |
| 36 | GND | Power in |
| 37 | SOUT1 | Output |
| 38 | SOUT0 | Output |
| 39 | IN3 | Input |
| 40 | VT3 | Input |
| 41 | IN3 | Input |
| 42 | VREF_AC3 | Output |
| 43 | GND | Power in |
| 44 | GND | Power in |
| 45 | EP_(GND) | Power in |
Open-source boards using it
All 1- 4 layers

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Is there a KiCad symbol and footprint for the SY89540UMY?
Yes. The symbol is Analog & Interface:SY89540U and the footprint ICs And Semiconductors SMD:QFN50P700X700X100-45N-S340, both drawn on this page. PCBKit places them on a board for you when you design with it.
What package is the SY89540UMY?
QFN-44-EP(7x7), with 45 pins. Its footprint is drawn on this page.
Where is the SY89540UMY datasheet?
Microchip Technology publishes it: the Datasheet link on this page opens it.
Where can I order the SY89540UMY?
JLCPCB lists it as part C633592, with 22 in stock; the sellers' links on this page open their listings.
Which open-source boards use the SY89540UMY?
1 board in 1 repository on GitHub; the most starred are listed on this page, with their KiCad files.