Summary
Five integrated circuits, used in Canon electronic calculators, made by Texas Instruments.
Integrated circuit # 1:
Type TMC1765, 1971
Integrated circuit # 2:
TMC1825, 1972
Integrated circuit # 3:
Unknown Type, circa 1972
Integrated circuit # 4:
Unknown Type, 1971
Integrated circuit # 5:
Unknown Type, 1971
Physical Description
Integrated circuit # 1: 40 Pin, white ceramic package with gold-plated leads and chip cover, 2.54mm pin spacing, 15.25mm (.6 inch) wide, 20 pins each side. Integrated circuit # 2: 40 Pin, Black plastic package, 2.54mm pin spacing, 15.25mm (.6 inch) wide, 20 pins each side. Integrated circuit # 3: 40 Pin, white ceramic package, gold-plated pins, and glass lid so the silicon chip can be viewed. 2.54mm pin spacing, 15.25mm (.6 inch) wide, 20 pins each side. Integrated circuit # 4: 28 Pin, white ceramic package, gold-plated pins and lid covering silicon chip. 2.54mm pin spacing, 15.25mm (.6 inch) wide, 14 pins each side. Integrated circuit # 5: 24 Pin, ceramic package sandwiched between gold-plated metal plates, 2.54mm pin spacing (gold plated), 15.25mm (.6 inch) wide, 20 pins each side.
More Information
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Collecting Areas
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Acquisition Information
Donation from Bleakley Gray Corp., Aug 1973
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Manufacturer
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Inscriptions
Integrated circuit # 1: TMC 1765 JC / (logo) Texas Instruments / 7107 Integrated circuit # 2: (logo) Texas Instruments / TMC1825ANC / 7211 Integrated circuit # 3: No markings on the device at all Integrated circuit # 4: TMC1730A JC / (logo) Texas Instruments / 7106 Integrated circuit # 5: TMC (obscured) / (logo) Texas Instruments / 7107
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Brand Names
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Classification
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Category
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Discipline
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Type of item
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Part Dimensions
50 mm (Width), 15 mm (Depth), 8 mm (Height)
Dimensions of Integrated Circuit No.1.
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Part Dimensions
62 mm (Width), 14 mm (Depth), 5 mm (Height)
Dimensions of Integrated Circuit No.2.
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Part Dimensions
50 mm (Width), 15 mm (Depth), 5 mm (Height)
Dimensions of Integrated Circuit No.3.
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Part Dimensions
30 mm (Width), 15 mm (Depth), 7 mm (Height)
Dimensions of Integrated Circuit No.4.
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Part Dimensions
30 mm (Width), 15 mm (Depth), 7 mm (Height)
Dimensions of Integrated Circuit No.5
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Keywords
Electronic Calculator Components, Electronic Calculators, Integrated Circuits, Silicon Chips