DATAMATH CALCULATOR MUSEUM
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DATAMATH CALCULATOR MUSEUM |
Texas Instruments TI-18 SLR
| Date of introduction: | 1985 | Display technology: | LCD |
| New price: | Display size: | 8 | |
| Size: | 4.8" x 2.6" x
0.40" 121 x 66 x 10 mm3 |
||
| Weight: | 1.6 ounces, 46 grams | Serial No: | 179113 |
| Batteries: | n.a. | Date of manufacture: | mth 06 year 1985 |
| AC-Adapter: | Origin of manufacture: | Taiwan (C) | |
| Precision: | 11 | Integrated circuits: | Toshiba |
| Memories: | 1 | ||
| Program steps: | Courtesy of: | Joerg Woerner | |
| Download manual: |
(EU: 1.2 MByte) |
If
you feel familiar with this rare scientific calculator sporting the [1/x], [x2],
[sqr X] and [pi] keys, view the SR-11 introduced
already in 1973 and combine it with the TI-30 STAT.
Dismantling
this TI-18 SLR manufactured in June 1985 by a non-disclosed OEM (Original Equipment
Manufacturer) in Taiwan reveals a clean design centered around around an unknown
Toshiba single-chip calculator
circuit soldered on a double-sided printed circuit board (PCB) and powered by
four solar cells.
Inspecting
the PCB of this TI-18 SLR calculator brought our attention to a small mark reading
S33T-10, we discovered already similar marks reading S32B-II
and S39A with the TI-108 resp. TI-1895 II. The
Date code C-0685 located on the back of the featured calculator and the
PCB-Mark S33T suggests a design of Kinpo
Electronics, Inc., manufactured in their
Cal-Comp
Electronics plant. We started compiling a list of the
PCB-Marks on calculators manufactured by OEMs for Texas Instruments.
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, May 13, 2002. No reprints without written permission.