Typically: Series 9E , delay value 102 (ns). Some manufacturers embed date codes or temperature ranges in the marking—check the full label.
| Substitute Part | Delay (ns) | Package | Notes | |----------------|------------|---------|-------| | DS1000-100 | 100 | DIP-14 | Maxim, 5-tap, slightly faster | | DS1100-100 | 100 | DIP-8 | Maxim, single output | | LTC6994-1 | Programmable | SOT-23 | Modern programmable delay, requires configuration | | MC10102 | 100 | DIP-16 | Motorola ECL, requires negative supply | | 9E104 | 104 | DIP-8 | Closer match, if available | 9e102 datasheet
It is obsolete but often available from surplus electronic suppliers (eBOM, Octopart, eBay) or authorized distributors specializing in legacy parts (Rochester Electronics). Typically: Series 9E , delay value 102 (ns)