Texas Instruments TI-53

Date of introduction:  1985 Display technology:  LCD
New price:   Display size:  8 (5 + 2)
Size:  5.8" x 2.8" x 0.85"
 147 x 72 x 22 mm3
Weight:  3.0 ounces, 84 grams Serial No:  
Batteries:  2*LR44 Date of manufacture:  wk 32 year 1985
AC-Adapter:   Origin of manufacture:  Italy
Precision:  11 Integrated circuits:  TP0323
Memories:  1    
Program steps:  32 Courtesy of:  Joerg Woerner

This TI-53 looks somewhat odd. If you compare it with the TI-55 III you notice that one line of keys is missing. Remember again the TI-55-II, the first calculator available in the slanted housing. The advantage of the TI-55-II compared with the slimline calculators like the original TI-53 was the bigger display and the extra line of keys. And now this one! 

TI-53_2_IC.jpg (34930 Byte)The electronics and the display of the slimline calculator in the slanted housing. Hard to understand but on the production line in 1985. Please notice that the TP0323 first generation C-MOS single-chip calculator was introduced already in 1978.

In 1986 Texas Instruments changed the design of the "2nd generation slanted calculators" slightly. If you compare this TI-53 introduced already in 1985 with the later TI-53 (1986) focus yourself on the position of the TI logo.

Don't miss the rare TI-40, introducing the missing keys.

Another off member in the second generation slanted family is the BA-III.

If you are interested in the calculating accuracy of scientific calculators don't miss the Calculator forensics.

horizontal rule

If you have additions to the above article please email:

Joerg Woerner, February 4, 2004. No reprints without written permission.