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TI-55

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TI-55
a TI-55
TypeProgrammable
ManufacturerTexas Instruments
Introduced1977
Discontinued1979
Calculator
Precision11 Floating point (within display)
Display typeLED
Display size8+2
CPU
ProcessorTI TMC1503NL
Other
Power supplybattery / cells
Power consumption2 LR44's
Weight84 grams (3.0 oz)
Dimensions147 mm × 71 mm × 22 mm (5.8 in × 2.8 in × 0.85 in)
TI-55 II Calculator, the second variant, with an LCD display

The TI-55 is a programmable calculator first manufactured by Texas Instruments in 1977. It has an LED display,[1] and weighs 6.4 ounces (180 grams). It is programmable to hold up to 32 key-codes that allow the user to repeat simple calculations with different values.[2]

Variants

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TI-55 II

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The TI-55 II (with an LCD display) was introduced in 1981, but, like many other Texas Instruments calculators of this time, suffered from serious keyboard reliability problems. Several variants of the TI-55 II exist.

TI-55 III

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The TI-55 III replaced the TI-55 II in the USA in 1986. It features redesigned keyboard mechanics, thereby eliminating the common "bouncing keys" fault of prior models. Several variants of the TI-55 III exist.

TI-56

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The TI-56 is a European variant of the TI-55 manufactured since 1976.

The SR-56 uses the TMC0501 scalable calculator architecture like the SR-50, SR-51 and SR-52. The TI SR-56 was followed shortly by the TI 57 which is similar in many ways but can not be connected to the PC-100 printer.

Date of introduction: May 21, 1976 Display technology: LED 10 + 2 Size: 5.8" x 3.:;2" x 1.3" 147 x 81 x 32 mm. Weight: 8.5 ounces, 240 grams Jmm Manufacturer: Texas Instrumentsr

References

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  1. ^ "MyCalcDB : Calculator Texas Instruments TI-55".
  2. ^ "Datamath".
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