DATAMATH CALCULATOR MUSEUM
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DATAMATH CALCULATOR MUSEUM |
Unisonic LC 263CK
| Date of introduction: | June 1981 | Display technology: | LCD |
| New price: | $27.95 (SRP June 1982) | Display size: | 8 |
| Size: | 2.8" x 6.0" x
0.30" 72 x 153 x 8 mm3 |
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| Weight: | 2.6 ounces, 74 grams | Serial No: | 20521447 |
| Batteries: | 2*LR44 | Date of manufacture: | year 1982 |
| AC-Adapter: | Origin of manufacture: | Japan | |
| Precision: | 8 | Integrated circuits: | NEC uPD1833G |
| Memories: | 3 | ||
| Program steps: | Courtesy of: | Joerg Woerner | |
| Download manual: | 
(US: 1.1 MByte) |
Unisonic entered the market of Checkbook Calculators with the
LC 262 in 1979. It features Account Manager functionality with three permanent (till you remove
the batteries) Memories and started a very successful product line. We discovered
as of now ten different family members:
| • 1979:
LC 262, 3 Memories, Credit Card size • 1981: LC 262CK, 3 Memories, Credit Card size • 1981: This LC 263CK, 3 Memories • 1981: LC 224CK, 1 Memory • 1982: LC 224CKE, 1 Memory, Pen • 1983: LC 224CKM, 1 Memory, Pen • 1983: LC 223CK, 1 Memory, Credit Card size • 1985: LC 225CK, 1 Memory • 1987: LC 266CK, 3 Memories, Taiwan • 1988: LC 226CK, 1 Memory, Taiwan • 1990: LC 226CK, 1 Memory, Thailand |
Dismantling
the featured LC 263CK manufactured in 1982 in Japan reveals a clean design
centered around a NEC uPD1833G single-chip calculator circuit powered by two
small LR44 batteries.
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, February 6, 2020. No reprints without written permission.