Marking of electronic components, SMD Codes HC257, HC257**. SN74HC257D, SN74HC257NSR, SN74HC257PW, CD74HC257M, ic marking code.
| PartNumber | Marking code | Manufacturer | Package |
|---|---|---|---|
| SN74HC257D | HC257 | SO-16 | |
| SN74HC257NSR | HC257 | SOP-16 | |
| SN74HC257PW | HC257 | TSSOP-16 | |
| CD74HC257M | HC257M | SO-16 |