Texas Instruments TI-1270

Date of introduction:  April 21, 1976 Display technology:  LED-stick
New price:  $18.95 Display size:  8
Size:  5.5" x 2.8" x 1.4"
 138 x 70 x 35 mm3
Weight:  3.9 ounces, 110 grams Serial No:  A 64488
Batteries:  9V  Date of manufacture:  wk 37 year 1976
AC-Adapter:  AC9180 Origin of manufacture:  Italy (RCI)
Precision:   Integrated circuits:  TMS0974/ZA0355
Memories:  1    
Program steps:   Courtesy of:  Joerg Woerner
    Download manual:   (US: 2.3M Bytes)
  (EU: 3.5M Bytes)

The colorful TI-1270 was manufactured both in the United States and Italy, the only differences are the design the of the Product Labels on the backside of the calculators.

Dismantling the featured TI-1270 with Date code 3776 RCI and manufactured in September 1976 in Rieti, Italy reveals a printed circuit board (PCB) identical with the Hardware Version 3 of the TI-1200 and TI-1250 calculators. The only change is the single-chip calculator circuit, we located a TMS0974 instead the TMS0972.

The TMS0970 series is based on the TMS1000, the World's first Microcomputer.

We located recently a TI-1270 sporting a almost red faceplate and manufactured in Italy, too. We are not sure if this color was intended or was simply a quality issue.

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Joerg Woerner, July 2, 2021. No reprints without written permission.