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)|
|Program steps:||Courtesy of:||Joerg Woerner|
|Download manual:||(US: 2.7M Bytes)|
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
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.
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© Joerg Woerner, December 5, 2001. No reprints without written permission.