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Texas Instruments TI-5140

Date of introduction:  1985 Display technology:  Fluorescent
New price:   Display size:  12
Size:  9.3" x 8.3" x 2.0"
 236 x 210 x 52 mm3
Printer technology:  Impact
Weight:  2 pounds 9 ounces
 1165 grams
Serial No:  196975
Batteries:   Date of manufacture:  mth 06 year 1986
AC-Adapter:  120 V Origin of manufacture:  Japan (T)
Precision:  12 Integrated circuits:  NEC uPD1231G
Memories:  1 + 1    
Program steps:   Courtesy of:  Joerg Woerner

The TI-5140 printing desktop calculator was introduced in 1985 and fits neatly into the TI-5130 series started already in 1981. 

TI-5140_INT.jpg (296368 Byte)Dismantling this TI-5140 manufactured in June 1986 reveals a design almost identical with the TI-5130.

TI-5140_PCB.jpg (156301 Byte)The main differences are the NEC uPD1231G single-chip calculator circuit and the 12-digit display compared to the uPD1234G chip driving a 10-digit display.

TI-5140_LBL.jpg (42460 Byte)Since we deciphered the product label of the TI-5310 matching the UL-File number E42662 with a identification code 694B, we know with Toshiba TEC Corp. the manufacturer of this calculator, too.

Don't miss the database of all known UL-File numbers found on Texas Instruments calculators.



 

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If you have additions to the above article please email: joerg@datamath.org.

Joerg Woerner, July 14, 2009. No reprints without written permission.