Texas Instruments SC-10

Date of introduction:  1988 Display technology:  LCD
New price:  $60.00 (SRP 1988) Display size:  10 + 2
Size:  5.7" x 6.1" x 0.40"
 146 x 155 x 10 mm3
Weight:  5.5 ounces, 155 grams Serial No:  4849
Batteries:  2*LR44 Date of manufacture:  mth 01 year 1988
AC-Adapter:   Origin of manufacture:  Taiwan (I)
Precision:  10 Integrated circuits:  
Memories:  5    
Program steps:   Courtesy of:  Joerg Woerner
    Download manuals:   (US: 12.1 MByte)
(US-QR: 0.2 MByte)

The SC-10, a.k.a. Collegiate, doesn't look like a calculator developed by Texas Instruments.

SC10_1.jpg (82809 Byte)The calculator uses a remarkable foldable keyboard with two different function layers.  You can either view the 15 built-in constants and 30 English-Metric conversions or the Two-variable statistics.

SC-10_1.jpg (238727 Byte)Dismantling this SC-10 calculator manufactured in January 1988 by Inventec Corporation in Taiwan reveals a well-engineered design centered around an unknown Toshiba single-chip calculator circuit soldered on a double-sided printed circuit board (PCB) and connected with two flexible connectors to a second PCB for the additional keys.
Running Mike Sebastian's "Calculator forensics" shows a pretty common result of 8.99999863704 - proving Toshiba as supplier of the chip.

Inspecting the PCB of this SC-10 calculator brought our attention to a small mark reading IOSC10-21B, we noticed similar marks already with other calculators manufactured by Inventec Corporation and started compiling a list of the PCB-Marks on calculators manufactured by OEMs for Texas Instruments.

A very similar calculator was sold under the label of Radio Shack. Compare the SC-10 with the EC-4025 and explore the battery access of the calculators.

Don't miss the Personal Banker, one of the best calculators developed ever.

Interested in foldable calculators? Canon introduced already in 1980 with the Canon card F-72 a remarkable product.

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If you have additions to the above article please email:

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