DATAMATH CALCULATOR MUSEUM
Texas Instruments TI-450
|Date of introduction:||1973||Display technology:||Panaplex II|
|New price:||Display size:||12|
|Size:||10.7" x 10.0" x 3.7"|
|Weight:||3 pounds 9 ounces||Serial No:||450015207|
|Batteries:||Date of manufacture:||year 1974|
|AC-Adapter:||120V AC||Origin of manufacture:||USA|
|Precision:||12||Integrated circuits:||TMS0203, TMC0322|
|Program steps:||Courtesy of:||Roger Gravel|
This rare TI-450 was introduced in the year 1973 soon after the TI-3500. The main limitation in daily use of the TI-3500 was the lack of a memory. The TI-450 used instead the of the modern "calculator-on-a-chip" invented already in the year 1971 a two-chip solution. The TMS02xx/TMS03xx family gives both enhanced driving capabilities for 12-digit displays and enhanced memory for program and data.
Related calculators using this chip set are the SR-20 and SR-22. The first usage of the chip set was the TI-4000 and the Canon 121F.
A similar housing was used with the PM550-301 Programmer.
|Click on the thumbnail at the right to open a high-resolution picture in a new window.|
|The picture at the right gives you a view of the Panaplex II display.|
|This pictures gives you the two integrated circuits forming the calculator brain.|
|This pictures gives you the complete printed circuit board (PCB) of the TI-450 calculator.|
Don't miss the rare TI-500, the first printing calculator introduced by Texas Instruments and the related TI-620.
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© Joerg Woerner and Roger Gravel, May 5, 2002. No reprints without written permission.