DATAMATH CALCULATOR MUSEUM
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DATAMATH CALCULATOR MUSEUM |
Texas Instruments TI-5225
| Date of introduction: | 1977 | Display technology: | Fluorescent |
| New price: | Display size: | 12 | |
| Size: | 12.0" x 12.3" x 3.3" | Printer technology: | Thermal TP-20225, TP-27225 |
| Weight: | 6 pounds 2 ounces | Serial No: | 0207647 |
| Batteries: | Date of manufacture: | year 1977 | |
| AC-Adapter: | 120 V or 220 V | Origin of manufacture: | USA |
| Precision: | 12 | Integrated circuits: | TMS1312, TMS1372 (ZA0396), 3*SN96912 |
| Memories: | 1 + 1 | ||
| Program steps: | Courtesy of: | Joerg Woerner |
This
huge desktop printing calculator is a sibling of the neat TI-5220
based one the earlier TI-5040.
Dismantling
the TI-5225 reveals some known components and a typical Texas Instruments
construction. The keyboard module is similar to the TI-3500
introduced already in 1972 and the printer is borrowed from the PC-100
printing cradle sold together with the SR-52.
The
printed circuit board (PCB) makes use of two enhanced devices of the famous TMS1000
Microcomputer family. We know similar chips already from the related TI-5220,
a sibling of the TI-5040. PC-100
printing cradle sold together with the SR-52
and the TMC0261 of the TI-5040.
An enhanced version of the TI-5225 was introduced with the odd TI-5230.
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, November 17, 2003. No reprints without written permission.