Ken Shirriff reverse engineered a vintage ST680A integrated circuit from Signetics' 1965 600 series, revealing it as a diode-transistor logic (DTL) quad NAND gate chip. The article also highlights Signetics' role in pioneering the plastic dual in-line package (DIP), which became the industry standard for IC packaging.
Background
Ken Shirriff is a well-known hardware engineer and blogger who regularly publishes detailed reverse engineering analyses of vintage integrated circuits on his blog righto.com. The Signetics 600 series was among the first commercially successful IC families.
- Source
- Lobsters
- Published
- Nov 10, 2026 at 06:25 AM
- Score
- 5.0 / 10