Texas Instruments TI-503

Date of introduction:  1990 Display technology:  LCD
New price:   Display size:  8
Size:  3.9" x 2.4" x 0.35"
 99 x 62 x 9 mm3
Weight:  1.2 ounces, 34 grams Serial No:  
Batteries:  LR54 Date of manufacture:  mth 02 year 1991
AC-Adapter:   Origin of manufacture:  China (N)
Precision:  8 Integrated circuits:  
Memories:  1    
Program steps:   Courtesy of:  Joerg Woerner

The TI-503 is one of the cheap calculators introduced with other TI-50x products like the TI-502, TI-507 or the TI-503SV

The street price of these calculators was around $3, earning money was difficult but a cheap construction and low labor cost of mainland China made it possible.

Dismantling this early TI-503 manufactured in February 1991 by Nam Tai Electronics, Inc. in China reveals a single-chip calculator circuit using a package in chip-on-board (COB) technology.

The TI-503 was replaced in 1995 with the more stylish TI-503+.



The TI-503 is featured in the Texas Instruments Incorporated sales catalog CL-1233 dated 1994.


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If you have additions to the above article please email:

Joerg Woerner, May 9, 2002. No reprints without written permission.