DATAMATH CALCULATOR MUSEUM
|
DATAMATH CALCULATOR MUSEUM |
Texas Instruments TI-1722+ CLEAR CALC
| Date of introduction: | 1996 | Display technology: | LCD |
| New price: | Display size: | 8 | |
| Size: | 4.5" x 2.5" x
0.4" 115 x 63 x 10 mm3 |
||
| Weight: | 1.6 ounces, 46 grams | Serial No: | |
| Batteries: | n.a. | Date of manufacture: | mth 06 year 1995 |
| AC-Adapter: | Origin of manufacture: | China (N) | |
| Precision: | 8 | Integrated circuits: | |
| Memories: | 1 | ||
| Program steps: | Courtesy of: | Joerg Woerner |
You
feel familiar with this translucent TI-1722+ CLEAR CALC calculator? Compare it with the earlier TI-1706+
and later TI-106.
Don't miss the similar HotCalc introduced two years
earlier.
Dismantling
this TI-1722+ calculator manufactured in June 1995 by Nam
Tai Electronics, Inc. in China reveals a clean design centered around an
unknown single-chip calculator circuit bonded in Chip-on-Board (COB) technology
directly onto a double-sided printed circuit board (PCB) and powered by four
solar cells.
Inspecting the PCB of this TI-1722+ calculator brought our attention to
two small marks reading
TI-1722+ TI-106 and HL302 confirming its relationship to the TI-106.
With the TI-1706+ introduced already in 1993 and sporting a
TI-106 and DA312 marking, we might miss a TI-106
manufactured between 1993 and 1995 in the Datamath Calculator Museum. We started compiling a list of the
PCB-Marks on calculators
manufactured by OEMs for Texas Instruments.
ClearCalc™ is a trademark
of Texas Instruments.
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, December 5, 2001. No reprints without written permission.