Texas Instruments TI-30Xa

Date of introduction:  1996 Display technology:  LCD
New price:   Display size:  10 + 2
Size:  5.9" x 3.0" x 0.50"    
Weight:  2.9 ounces Serial No:  
Batteries:  2*LR44 Date of manufacture:  mth 02 year 1997
AC-Adapter:   Origin of manufacture:  China
Precision:  12 Integrated circuits:  Toshiba T6M79 or T6M80A
Memories:  3    
Program steps:   Courtesy of:  Joerg Woerner

TI-30XA_P1.jpg (312671 Byte) Texas Instruments changed in 1996 the design of the scientific calculators to a smoother design and replaced the original TI-30Xa. The family covers three members:

TI-30Xa Solar
TI-36X Solar   Includes 2-dim statistics, conversions and binary/hexadecimal number bases

Within this family two financial calculators were introduced:

BA Real Estate
BA-35 Solar

All functions seem to be identical to the predecessors, compare this model from 1996 with the earlier TI-30Xa.

TI-30Xa_N0898_PCB.jpg (130688 Byte)TI-30Xa_PCB.jpg (78681 Byte)Dismantling an early TI-30Xa reveals indeed a single-chip calculator circuit manufactured by Toshiba. Unfortunately the integrated circuit is soldered the wrong way on the printed circuit board (PCB) and we couldn't get the numbers. Later calculators, make use of the chip-on-board technology. The PCB on the right was located in a TI-30Xa manufactured in August 1998 by Nam Tai Electronics, Inc. 

Read more about the Logarithm Bug and its side effect on the related yx function present in this calculator.

The next step in this calculator line is the TI-30X IIB with a two-line display, nevertheless introduced Texas Instruments in April 2004 a slightly redesigned TI-30XA. The similar TI-36X SOLAR introduced only one month later received a complete new design.

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If you have additions to the above article please email:

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