Texas Instruments TI-1265

Date of introduction:  April 9, 1976 Display technology:  Fluorescent
New price:  $26.95 Display size:  8
Size:  5.5" x 2.8" x 1.4"
 138 x 70 x 35 mm3
Weight:  4.5 ounces, 127 grams Serial No:  186926
Batteries:  9V  Date of manufacture:  wk 02 year 1977
AC-Adapter:  AC9180 Origin of manufacture:  USA
Precision:  8 Integrated circuits:  TMS1043
Memories:  1    
Program steps:   Courtesy of:  Joerg Woerner

In comparison with all other members of the huge TI-1200 and TI-1400 line you'll find here a blue-green fluorescent display. This gives you both a better readability and a longer lifetime of the 9V battery.

TI-1265_PCB.jpg (67207 Byte)The internal design of the TI-1200 was changed to accommodate the larger display tube. Instead of the TMS095x and TMS097x calculator circuits, this one makes use of the TMS1043 single-chip calculator circuit based on the TMS1000 Microcomputer family.  
We know this IC already from the TI-2550 III sporting even [1/x], [x2] and [sqr(x)] keys.

The Dutch department store HEMA sold an identical model as reactor 1265.

Don't miss the rare Texas Instruments 1265 manufactured for Koh-I-Noor Hardtmuth.

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If you have additions to the above article please email:

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