DATAMATH CALCULATOR MUSEUM
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DATAMATH CALCULATOR MUSEUM |
Texas Instruments TI-2200 II CheckWriter
| Date of introduction: | 1991 | Display technology: | LCD |
| New price: | $19.95 (SRP 1991) | Display size: | 8 |
| Size: | 2.8" x 6.1" x
0.25" 70 x 154 x 7 mm3 |
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| Weight: | 2.5 ounces, 72 grams | Serial No: | |
| Batteries: | LR54 | Date of manufacture: | mth 06 year 1995 |
| AC-Adapter: | Origin of manufacture: | Thailand (C) | |
| Precision: | 8 | Integrated circuits: | Toshiba T7752S |
| Memories: | 3 | ||
| Program steps: | Courtesy of: | Stefan Klaes | |
| Download manual: | 
(US: 4.3 MByte) |
Texas Instruments entered the
market of Checkbook Calculators with the
TI-1880 Checkwriter in 1981, almost
3 years after National Instruments' NS103, but it was nothing else than a basic
calculator put in a fancy wallet. The TI-2200 Checkwriter introduced in October
1982 added Account Manager functionality with three permanent Memories and started a very successful product line. We discovered
as of now seven different family members:
| • 1982 - 1984:
TI-2200 Silver, unknown OEM, Americas market • 1982 - 1984: TI-2200 Silver, unknown OEM, European market • 1984 - 1986: TI-2200 Gold, Compal Electronics Taiwan, Americas market • 1984 - 1986: TI-2200 II Gold, Compal Electronics Taiwan, European market • 1986 - 1991: TI-2200 II Solar cells, Compal Electronics Taiwan, Global market • 1991 - 1996: TI-2200 II Solar cells, Compal Electronics Thailand, Global market • 1996 - 2002: TI-2200+, Inventec Corporation Malaysia, Global market |
Dismantling the featured
TI-2200 II manufactured in June 1995 by
Compal Electronics in Thailand reveals a
clean design centered around a Toshiba T7752S single-chip calculator circuit
soldered on a double-sided printed circuit board (PCB) and powered by four solar
cells and a small LR54 (LR1130) backup battery.
Inspecting the PCB of this TI-2200
II manufactured in June 1995 brought our attention to a small mark reading
308-15,
most likely a reference to Type 308 and Revision 1.5
of the design (schematics and layout). We noticed the
PCB-Mark 308
during our research on the PCBs of a lot of more or less identical Account
Managers, find an overview of the OEM brands/models
here.
Please find an overview of the
PCB-Marks we discovered
so far on Account Manager calculators.
Learn more about single-chip calculator circuits used in
Account
Manager Calculators.
Don't miss the Corvus CheckMaster introduced by Mostek already in 1975. This rare product retains the balance of your memory even when shut off but uses power-hungry electronics.
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, December 26, 2002 and February 12, 2020. No reprints without written permission.