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Texas Instruments TI-25 Version 2

Date of introduction:  1978 Display technology:  LCD
New price:   Display size:  8 (5 + 2)
Size:  5.3" x 2.9" x 0.35"    
Weight:  3.0 ounces Serial No:  637649
Batteries:  2*LR44 Date of manufacture:  mth 01 year 1979
AC-Adapter:   Origin of manufacture:  Japan
Precision:  9 Integrated circuits:  Toshiba PN1033734
Memories:  1    
Program steps:   Courtesy of:  Joerg Woerner
    Download manuals:   (US: 6.7 MByte)
  (EU: 18.6 MByte)

TI-25_PCB.jpg (114654 Byte)TI-25_IC.jpg (126407 Byte)The second version of the TI-25 uses the Toshiba PN1033734 calculator chip know from the SLC-8260 calculator instead the T3763 known from the SLC-8261.

Changes from Version 1 to Version 2:

  Version 1 Version 2
ON/C-key black green
Battery comp. screw no yes
Calculator circuit T3763 PN1033734
PCB-number KB-6526-02 KB-6526-51K

Don't miss the similar Canon F-42 introduced in 1980.

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If you have additions to the above article please email: joerg@datamath.org.

Joerg Woerner, July 1, 2002. No reprints without written permission.