DATAMATH CALCULATOR MUSEUM
|
DATAMATH CALCULATOR MUSEUM |
Texas Instruments TI-503SV
| Date of introduction: | 1998 | Display technology: | LCD |
| New price: | Display size: | 8 | |
| Size: | 4.5" x 2.8" x
0.45" 114 x 72 x 11 mm3 |
||
| Weight: | 1.7 ounces, 47 grams | Serial No: | |
| Batteries: | LR54 | Date of manufacture: | mth 10 year 1998 |
| AC-Adapter: | Origin of manufacture: | Thailand (C) | |
| Precision: | 8 | Integrated circuits: | Sharp LI3154 |
| Memories: | 1 | ||
| Program steps: | Courtesy of: | Joerg Woerner |
The
TI-503SV followed the TI-503+ and added a square-root
function. The TI-501 line of "cheap calculators"
started already in the year 1982 and brought us models like the TI-502
or the TI-507.
Dismantling
this early TI-503SV manufactured in October 1998 by Cal-Comp
Electronics, a subsidiary of
Kinpo
Electronics, Inc., in Thailand reveals a Sharp LI3154 single-chip calculator circuit
using a conventional package. Production of the
TI-503SV was shifted in 2000 from Thailand to China.
Later models of the TI-503SV used the
more common chip-on-board (COB)
technology.
We know the Sharp LI-3154 calculator chip already from the cheap TI-1726.
Inspecting
the PCB of this TI-503SV calculator brought our attention to a small marks reading
403T-10-3 and we started compiling a list of the
PCB-Marks on calculators manufactured by OEMs for Texas Instruments.
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, February 25, 2021. No reprints without written permission.