Marking of electronic components, SMD Codes HC540, HC540**. SN74HC540DW, SN74HC540NSR, SN74HC540PW, CD74HC540M, ic marking code.
| PartNumber | Marking code | Manufacturer | Package |
|---|---|---|---|
| SN74HC540DW | HC540 | SOIC-20W | |
| SN74HC540NSR | HC540 | SOP-20 | |
| SN74HC540PW | HC540 | TSSOP-20 | |
| CD74HC540M | HC540M | SOIC-20W |