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)

TI-5025_Back.jpg (306889 Byte)TI-5025_P1.jpg (312787 Byte)In a direct comparison with the TI-5050 you could call this printing calculator not only handheld, it was really pocket sized.

TI-5025_1.jpg (50978 Byte)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.

TI-5025_PCB.jpg (80354 Byte)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.

TI-5025_2.jpg (29214 Byte)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.

horizontal rule

If you have additions to the above article please email:

Joerg Woerner, December 5, 2001. No reprints without written permission.