Toshiba SC-7500

Date of introduction:  1977 Display technology:  Fluorescent
New price:   Display size:  10 + 2
Size:  5.7" x 3.2" x 1.0"
 146 x 82 x 26 mm3
Weight:  5.5 ounces, 155 grams Serial No:  130430
Batteries:  4*AA Date of manufacture:  year 1977
AC-Adapter:  BH-117 (110V) or
 BH-118 (220V)
Origin of manufacture:  Japan
Precision:  8 Integrated circuits:  Mitsubishia M58628-001
Memories:  1    
Program steps:   Courtesy of:  Joerg Woerner

This Toshiba SC-7500 added some statistical functions to Toshiba's first scientific calculator, the SC-7100 introduced already in 1975.

The SC-7500 is based on a Mitsubishi M58628-001 single-chip calculator circuit, known e.g. from the Radio Shack EC-495, in place of the Toshiba T3327 chip found in the SC-7100. Running Mike Sebastian's "Calculator forensics" gives for the SC-7500 with 9.003347136 a much better result than the SC-7100 with 9.148251 instead of the expected value close to 9.0000.

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Joerg Woerner, December 12, 2010. No reprints without written permission.