DATAMATH CALCULATOR MUSEUM
|Date of introduction:||1980||Display technology:||Fluorescent|
|New price:||Display size:||10|
|Size:|| 6.5" x 3.8" x
166 x 96 x 32 mm3
|Weight:||6.7 ounces, 194 grams||Serial No:||18400677|
|Batteries:||2*AA||Date of manufacture:||mth 12 year 1980|
|AC-Adapter:||JL-046, JL-047, or JL-048||Origin of manufacture:||Japan|
|Precision:||20||Integrated circuits:||TMC1081NL (MBSLΔ8048)|
|Program steps:||Courtesy of:||Joerg Woerner|
|Download manual:||(US: 2.2M Bytes)|
Matsushita Electric Industrial Co., Ltd.,
founded by Kōnosuke Matsushita in 1918 as a light bulb socket manufacturer
and better known under their current name
Panasonic Corporation or
National brand, is a major Japanese multinational electronics company, headquartered in Kadoma,
Osakas. Matsushita introduced already in 1969 with the PANAC-12W (JE-240) their
first electronic desktop calculator with 12-digit capability and Nixie tube
display joining established Japanese manufacturers like Busicom, Canon, Sanyo,
Sharp, Sony and Toshiba. Next important step in Matsushita's calculator line was
the sleek Panasonic 1000 (JE-102) introduced in 1971 and based on seven LSI (Large
Scale Integration) chips manufactured by Mitsubishi before introducing in 1972
the Panasonic 1010 (JE-1010) with just two Mitsubishi LSI chips and finally
switching with the JE-801 and JE-1001 to Texas Instruments'
single-chip calculator technology.
This portable JE-170U calculator was introduced in 1980 together with its desktop twin JE-1604U and provides 20-digit arithmetic and a 10-digit display. When the calculated result exceeds 10-digits before the decimal point, the overflow symbol "C" or "E" lights up at the left of the display and the approximate result can be obtained by multiplying the displayed number by 1010.
Dismantling the featured JE-170U manufactured in December 1980
by Matsushita in Japan for the North American market reveals a very compact design
based on a single-sided printed circuit board (PCB) centered around a
single-chip calculator circuit connected to the keyboard and powered by two AA-sized disposable Alkaline batteries.
The TMC1081NL is a member of the TMS1000 Microcomputer family introduced in October 1974 with the SR-16 calculator. While the TMS1000 design was mainly intended for designs using power-hungry LED displays with external display drivers, uses the TMS1070 redesigned output drivers for the 11 R-Outputs (Display Scan) and 8 O-Outputs (Segments) that can withstand voltages up to -35 Volts and hence allows direct operation of low-voltage Vacuum Fluorescent Displays (VFDs).
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© Joerg Woerner, December 28, 2022. No reprints without written permission.