

Overview
The HCPL2731SD is a logic Output Optoisolator made by onsemi in a SOP-8-2.54mm package with 8 pins. -40℃~+85℃ 100mW 120us 2 2.5kV 500mV~18V 500uA 90us DC SOP-8-2.54mm Logic Output Optoisolators ROHS.
PCBKit's library has its KiCad symbol (Isolator:HCPL2731, from KiCad's library) and its footprint (EasyEDA_Cloud:SMD-8_L9.8-W6.6-P2.54-LS10.3-BL, from EasyEDA), ready for a KiCad board. JLCPCB lists it (part C899540). 1 open-source board in 1 repository on GitHub use it.
Symbol
Footprint
Parameters
15- CMTI(kV/us)
- 10kV/us
- Current transfer ratio
- 400%
- Forward Current(If)
- 20mA
- High level Delay Time
- 90us
- Input Type
- DC
- Input threshold current
- 500uA
- Isolation Voltage(Vrms)
- 2.5kV
- Low level Delay Time
- 120us
- Number of Channels
- 2
- Operating Temperature
- -40℃~+85℃
- Output current
- 60mA
- Reverse Voltage
- 5V
- Voltage - Forward(Vf)
- 1.3V
- Voltage - Supply
- 500mV~18V
- power dissipation
- 100mW
Order codes
1- HCPL2731SDLCSC C899540
Pinout
8| Pin | Name | Type |
|---|---|---|
| 1 | A1 | Passive |
| 2 | C1 | Passive |
| 3 | C2 | Passive |
| 4 | A2 | Passive |
| 5 | GND | Passive |
| 6 | VO2 | Passive |
| 7 | VO1 | Passive |
| 8 | VCC | Passive |
Open-source boards using it
All 1- 2 layers100 × 100 mm

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Is there a KiCad symbol and footprint for the HCPL2731SD?
Yes. The symbol is Isolator:HCPL2731 and the footprint EasyEDA_Cloud:SMD-8_L9.8-W6.6-P2.54-LS10.3-BL, both drawn on this page. PCBKit places them on a board for you when you design with it.
What package is the HCPL2731SD?
SOP-8-2.54mm, with 8 pins. Its footprint is drawn on this page.
Where is the HCPL2731SD datasheet?
onsemi publishes it: the Datasheet link on this page opens it.
Where can I order the HCPL2731SD?
JLCPCB lists it as part C899540, with 0 in stock; the sellers' links on this page open their listings.
What can replace the HCPL2731SD?
Parts like it in the library: the ICPL3120SMT/R by Isocom Components, the CT350S(T1) by CT Micro International, the VO3120-X007T by Vishay Intertechnology and the FOD3181SD by onsemi. Check their datasheets: a part that fits the footprint may still differ in its ratings.
Which open-source boards use the HCPL2731SD?
1 board in 1 repository on GitHub; the most starred are listed on this page, with their KiCad files.
Parts like it
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