DATAMATH CALCULATOR MUSEUM
Texas Instruments TI-508 PLUS
|Date of introduction:||1992||Display technology:||LCD|
|New price:||Display size:||8|
|Size:|| 4.9" x 4.2" x 1.0"
125 x 106 x 25 mm3
|Weight:||3.0 ounces, 84 grams||Serial No:|
|Batteries:||n.a.||Date of manufacture:||mth 06 year 1994|
|AC-Adapter:||Origin of manufacture:||Thailand (C)|
|Precision:||8||Integrated circuits:||Sharp LI3154|
|Program steps:||Courtesy of:||Joerg Woerner|
This TI-508 PLUS was introduced in 1992 for the European market together with the almost identical TI-1795+ for the American market. It followed the original TI-508 and still hides the secret why more or less identical calculators carry a "Handheld (TI-5xx)" or "Desktop (TI-17xx)" designation.
this TI-508 LPUS manufactured in June 1994 by
Electronics in Thailand reveals a very simple construction centered
around a Sharp LI3154 single-chip calculator circuit soldered on a double-sided
printed circuit board (PCB) and powered by solar cells. We noticed this chip during our research about
so-called Checkbook Calculators with the Radio Shack
Learn more about single-chip calculator circuits used in Account Manager Calculators.
Inspecting the PCB of this TI-508 PLUS calculator brought our attention to a small mark reading SD9L1-10-1, most likely a reference to Type Small Desktop 9. We spotted a very similar PCB-Mark already with the Radio Shack EC-2006A and Privileg SOLAR 31 and 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: email@example.com.
© Joerg Woerner, January 12, 2004. No reprints without written permission.