DATAMATH CALCULATOR MUSEUM |
Texas Instruments TI-1265 distributed by HEMA
Date of introduction: | 1976 | Display technology: | Fluorescent |
New price: | 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: | |
Batteries: | 9V | Date of manufacture: | wk 12 year 1977 |
AC-Adapter: | AC9180 | Origin of manufacture: | Italy (RCI) |
Precision: | 8 | Integrated circuits: | TMS1043 |
Memories: | 1 | ||
Program steps: | Courtesy of: | Hans Bloemen / Marie Lisa Collas |
Nothing else than a TI-1265 with another sticker. The brand reactor was used by the Dutch department store HEMA.
We know with the TI-1025, TI-1250,
and TI-1265 three different Texas Instruments calculators sold by HEMA under
there own label.
Dismantling the featured TI-1265 with
Date code 0977 LTA and manufactured in
March 1977
in Lubbock, Texas reveals indeed a much more complex design than a
TI-1250 manufactured in the same timeframe and having
similar capabilities. Instead a very efficient and cost-optimized design
with a single-sided printed circuit board (PCB) centered
around a TMS0972 single-chip
calculator circuit and no other components than an 8-digit display modules, do
we recognize:
•
TMS1043 single-chip
calculator circuit with integrated high voltage drivers, based
on the TMS1000
-
the World's first Microcomputer • DC/DC Converter Module to generate the high voltage (around -22V) for the Anodes and Grids of the VF-Display • ITRON 9-digit VFD Module |
The TMS1043 was used with the
TI-2550
III, too and sporting even [1/x], [x2] and [√x] keys.
Don't miss the rare Texas Instruments
1265
manufactured for Koh-I-Noor
Hardtmuth.
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, September 19, 2002. No reprints without written permission.