Texas Instruments Galaxy 40sx  

Date of introduction:  1991 Display technology:  LCD 
New price:   Display size:  10 (6 + 2)
Size:  3.4" x 5.5" x 0.65"
 87 x 140 x 17 mm3
Weight:  3.9 ounces, 111 grams Serial No:  
Batteries:  n.a. Date of manufacture:  wk 26 year 1994
AC-Adapter:   Origin of manufacture:  Italy (RCI)
Precision:  12 Integrated circuits:  Toshiba T6A59
Memories:  1    
Program steps:   Courtesy of:  Joerg Woerner
    Download manual:   (DE: 3.1 MByte)

With the Galaxy 40x Texas Instruments introduced an enhanced scientific calculator performing fractional arithmetic. You may use two different modes:

Euklid's division: 56 / 5 = 11 (Q)  1 (R)
Fractional division: 56 / 5 = 11_1/5

With the SIMP and F-D-key you can shorten results and convert between fractional and decimal display:

3_35/70 SIMP 3_1/2  F-D 3.5

Galaxy40sx_PCB.jpg (73590 Byte)With the Galaxy 40sx Texas Instruments sold a similar calculator using solar cells. A more traditional housing was used with the similar TI-32 Explorer Plus and the European TI-40 Solar. If you are interested in the calculating accuracy of scientific calculators don't miss the Calculator forensics.

Stokes Publishing Company, Inc. based in Sunnyvale, California sold a companion for the teacher, view the wonderful GALACTIC 40SX.

A less sophisticated calculator using the fractional arithmetic was introduced 1991 with the Galaxy 9.


horizontal rule

If you have additions to the above article please email:

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