Texas Instruments TI-57 LCD

Date of introduction:  1982 Display technology:  LCD
New price:   Display size:  8 + 2
Size:  5.8" x 3.1" x 0.90"
 147 x 79 x 23 mm3
Weight:  3.7 ounces, 106 grams Serial No:  210035
Batteries:  2*LR44 Date of manufacture:  wk 21 year 1984
AC-Adapter:   Origin of manufacture:  Italy
Precision:  11 Integrated circuits:  TP0456/CD4555, CD4572
Memories:  1-8    
Program steps:  48-0 Courtesy of:  Joerg Woerner
    Download manual:   (US-QR: 1.8M Bytes)
  (DE: 16.1M Bytes)

The TI-57 LCD is another member of the first generation slanted calculators started with the TI-55-II. If you compare this one with its predecessor TI-57 you'll notice some disadvantages in programmability. Overall memory was roughly reduced by 50%.

TI-57LCD_PCB.jpg (55365 Byte)The TI-57 LCD makes use of the two chip Primary-Secondary architecture introduced with the TI-55 II. Unbelievable that the original TI-57 demonstrated more performance with a single-chip microcontroller introduced 5 years earlier.
Find more information about the TP0456 calculator chips here.

The limitation of the keyboard is known from the TI-55-II and was the reason of the soon replacement with the TI-57-II.

The coloring off the keyboard differs between Italian and US produced calculators. Compare this Italian design with the TI-57 LCD manufactured in US.

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


The TI-57 LCD is featured in the Texas Instruments Incorporated leaflet CL-199M dated 1983.


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If you have additions to the above article please email:

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