| Manufacturer | Part Number | Description |
|---|---|---|
STMicroelectronics
| LS1240A | ELECTRONIC TWO - TONE RINGER |
|
STMicroelectronics
| LS1240AD1 | ELECTRONIC TWO - TONE RINGER |
Unisonic Technologies
| LS1240A | ELECTRONIC TONE RINGER |
Fairchild (now onsemi)
| DM74ALS1240A | Octal 3-STATE Bus Driver |
Wing Shing Computer Components
| LS1240A | Electronic Two-Tone Ringer |
TGS
| LS1240ACP | Single-Chip Electronic Ringer |
|
Wing Shing Computer Components
| LS1240AD1 | Electronic Two-Tone Ringer |
