Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Prefix class | Type and usage | Example | Equivalent | Reference |
| --- | --- | --- | --- | --- |
| AC | Germanium small-signal AF transistor | AC126 | NTE102A | Datasheet |
| AD | Germanium AF power transistor | AD133 | NTE179 | Datasheet |
| AF | Germanium small-signal RF transistor | AF117 | NTE160 | Datasheet |
| AL | Germanium RF power transistor | ALZ10 | NTE100 | Datasheet |
| AS | Germanium switching transistor | ASY28 | NTE101 | Datasheet |
| AU | Germanium power switching transistor | AU103 | NTE127 | Datasheet |
| BD | Silicon, power transistor | BD139 | NTE375 | Datasheet |
| BF | Silicon, RF (high frequency) BJT or FET | BF245 | NTE133 | Datasheet |
Question:
What is every reference for type and usage of Germanium small-signal RF transistor?
Answer:
Datasheet