# Texas Instruments TI-80

The Texas Instruments TI-80 is a graphing calculator with 10 digits precision and formula input logic. It has 50 keys, and an LCD (liquid crystal) display. The power source is 2xCR2032 3V. The calculator was manufactured in Taiwan. A sample of this calculator is held in the calculator.org collection.

## Facts at a glance:

Feature | Value |
---|---|

Type | Graphing |

Keys | 50 |

Precision | 10 |

Logic | Formula |

Display type | LCD |

Display size | 64 |

Length | 162mm |

Width | 72mm |

Thickness | 15mm |

Weight | 142g |

Power Source | 2xCR2032 3V |

Country | Taiwan |

Year introduced | 1995 |

Year discontinued | 1996 |

## Diagnostics

Note that diagnostic tests generally delete any data on the calculator. Be sure to back up any important information held in the calculator before running these tests.

Press MODE, ALPHA and S keys simultaneously. Press ENTER when prompted.

## Replacements:

If you have a Texas Instruments TI-80 that is no longer working, you can first try replacing the 2xCR2032 3V batteries. If that doesn't solve the problem, then you can consider replacing the calculator with a modern equivalent.

We suggest the following current models as possible replacements: