DATAMATH CALCULATOR MUSEUM
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DATAMATH CALCULATOR MUSEUM |
Texas Instruments TI-5025
| Date of introduction: | June 11, 1978 | Display technology: | Fluorescent |
| New price: | $79.95 | Display size: | 8 |
| Size: | 6.6" x 3.4" x 1.8" 168 x 86 x 45 mm3 |
Printer technology: | Thermal TP-12150 |
| Weight: | 16 ounces, 452 grams | Serial No: | 9936439 |
| Batteries: | 7*AA NiCd | Date of manufacture: | wk 01 year 1980 |
| AC-Adapter: | AC9172 | Origin of manufacture: | USA (MTA) |
| Precision: | 8 | Integrated circuits: | TMC0262 |
| Memories: | 1 | ||
| Program steps: | Courtesy of: | Joerg Woerner | |
| Download manual: | 
(US: 2.7M Bytes) |
In
a direct comparison with the TI-5050 you could call
this printing calculator not only handheld, it was really pocket sized.
Dismantling
the TI-5025 reveals some known components and a typical Texas Instruments
construction. The keyboard module seems to be borrowed from the TI-1200
introduced already in 1975 and the display is similar to the TI-1050
from 1977.
The
printed circuit board (PCB) is centered around a TMC0262 single-chip calculator
circuit,
similar to the TMC0980 used with the
TI-30 and adding some features to drive
a VF-Display borrowed from the TMC0920 (TI-1050)
and a thermal printer borrowed from the TMC0251
used with the PC-100
printing cradle. The first application of the TMC0260
could be found with the redesign of the TI-5040.
Radio Shack sold an identical calculator under their part
number EC-3004.
The
thermal printing head itself is a smaller version of the one used in the PC-100
cradle.
The successor of this heavy, battery operated calculator could
be found with the TI-5010, actually a Toshiba design.
The TI-5025 was introduced together with a dozen other products by Texas Instruments at the Summer Consumer Electronics Show, June 11-14, 1978. Don't miss the original press release.
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, December 5, 2001. No reprints without written permission.