| Название | Описание | Производитель | Корпус | Выводы | Темп. Диапазон | Файл PDF |
| HT640 | Encoder for burglar alarm system, car door controllers and etc. | Holtek Semiconductor Inc. | SDIP | 24 | -20°C | 75°C | HT640 datasheet (155K) |
| HT640 | Encoder for burglar alarm system, car door controllers and etc. | Holtek Semiconductor Inc. | SOP | 24 | -20°C | 75°C | HT640 datasheet (155K) |
| HT644L | Decoders for burglar alarm system, car door controllers and etc. | Holtek Semiconductor Inc. | SDIP | 24 | -20°C | 75°C | HT644L datasheet (837K) |
| HT644L | Decoders for burglar alarm system, car door controllers and etc. | Holtek Semiconductor Inc. | SOP | 24 | -20°C | 75°C | HT644L datasheet (837K) |
| HT646L | Decoders for burglar alarm system, car door controllers and etc. | Holtek Semiconductor Inc. | SOP | 24 | -20°C | 75°C | HT646L datasheet (837K) |
| HT646L | Decoders for burglar alarm system, car door controllers and etc. | Holtek Semiconductor Inc. | SDIP | 24 | -20°C | 75°C | HT646L datasheet (837K) |
| HT648L | Decoders for burglar alarm system, car door controllers and etc. | Holtek Semiconductor Inc. | SDIP | 24 | -20°C | 75°C | HT648L datasheet (837K) |
| HT648L | Decoders for burglar alarm system, car door controllers and etc. | Holtek Semiconductor Inc. | SOP | 24 | -20°C | 75°C | HT648L datasheet (837K) |
| HT651 | Decoders for burglar alarm system, car door controllers and etc. | Holtek Semiconductor Inc. | SOP | 24 | -20°C | 75°C | HT651 datasheet (837K) |
| HT651 | Decoders for burglar alarm system, car door controllers and etc. | Holtek Semiconductor Inc. | SDIP | 24 | -20°C | 75°C | HT651 datasheet (837K) |
