DATAMATH CALCULATOR MUSEUM
Texas Instruments TI-5315
|Date of introduction:||1988||Display technology:||Fluorescent|
|New price:||Display size:||12|
|Size:||9.7" x 9.2" x 4,8"||Printer technology:|
|Weight:||1 pound 11 ounces||Serial No:||105327|
|Batteries:||Date of manufacture:||mth 07 year 1989|
|AC-Adapter:||120 V||Origin of manufacture:||Taiwan (Z)|
|Precision:||12||Integrated circuits:||NEC uPD75206CW-130|
|Memories:||1 + 1|
|Program steps:||Courtesy of:||Joerg Woerner|
|Download leaflet:||(US: 1.2 MByte)|
Texas Instruments introduced with the TI-5315 in 1988 the unique combination of a printer-less 12-digit commercial desktop calculator with a built-in clock. Compared with the TI-3510 introduced almost 15 years earlier, added the TI-5315 much more functionality into a slightly larger package.
Dismantling the TI-5315 reveals a clean design centered around a NEC uPD75206 4-bit single-chip microcomputer.
Originally developed for VCR controller and similiar applications, matches the architecture of the uPD75206 perfect the requirements of the TI-5315:
|6k Byte program memory|
|369 x 4 bit data memory|
|Integrated watch circuit with 5 uA standby current|
|Integrated drivers for VF-Displays|
|0.95 us instruction cycle time @ 4.19 MHz crystal frequency|
printed circuit board (PCB) of the TI-5315 doesn't mention its manufacturer, but
the label on the backside of the calculator gives two hints:
The Date code with the leading "Z"
identifies Zeny Corporation in|
Taiwan, ROC as the contract manufacturer of the TI-5315.
|The UL-File number E42662 of the
calculator reveals it as a product|
manufactured by Toshiba TEC Corp.
Don't miss the database of all known UL-File numbers found on Texas Instruments calculators.
Texas Instruments continued the design language of the TI-5315 and introduced in 1989 the sibblings TI-5322 and TI-5332 sporting a printer but missing the clock.
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© Joerg Woerner, July 7, 2009. No reprints without written permission.