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Texas Instruments TI-5217
Texas Instruments introduced in 1980 a family of 4 similar desktop calculators. Most features are identical, differences could be found in the display and memory architecture:
Model | TI-5213 | TI-5215 | TI-5217 | TI-5219 |
Display | no | no | 12 digits | 12 digit |
Memories | GT | GT, M | GT | GT, M |
Price | $110 | $125 | $135 | $150 |
Dismantling
the TI-5217 reveals a clear layout. The printer mechanism and power supply are
located in separate cavities of the housing. The keyboard could be easily
removed and reveals the printed circuit board (PCB) of the calculator.
The
PCB of the TI-5217 makes use of a single-chip microcomputer uPD1251G
manufactured by NEC Corporation, Japan. The PCB was obviously manufactured by Sansyu
Precision Co., Ltd., Japan. We know this company already from the TI-1750
introduced 1977.
The TI-5217 is featured in the Texas Instruments Incorporated bulletin
CL-652 dated 1981.
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, June 11, 2005. No reprints without written permission.