Texas Instruments BA-54 Business Programmable

Date of introduction:  1986 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 26 year 1987
AC-Adapter:   Origin of manufacture:  Italy
Precision:  11 Integrated circuits:  TP0456/CD4553, CD4554
Memories:  5-0    
Program steps:  0-40 Courtesy of:  Joerg Woerner
Download leaflet:   (US: 1.1M Bytes) Download manual:   (US: 3.5M Bytes)

If you read the technical comments on the TI-55 III you know the reason why Texas Instruments introduced 1986 the BA-54.

From the technical point of view the calculators are similar, both use identical displays and integrated circuits. The main difference is the quality of the keyboard and the lack of the serial printer port.

Well, they called this calculator now "Business Programmable" but the programming model is identical to other machines of that epoche. You may convert some memory space to program steps, each step simulates one keyboard entry. The only possible branch execution is a unconditioned restart (RST) to the begin of the key sequence.

Compare the appearance with its predecessor BA-55.

The BA-54 is featured in the Texas Instruments France SA leaflet ECD488F dated 1988 and the Texas Instruments Incorporated bulletin CL-886 dated 1986.


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If you have additions to the above article please email:

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