Texas Instruments TI-65 Technical Analyst   

Date of introduction:  1987 Display technology:  LCD
New price:  $80.00 (SRP 1988) Display size:  10 + 2
Size:  3.5" x 5.7" x 0.8"    
Weight:  4.0 ounces Serial No:  
Batteries:  2*LR44 Date of manufacture:  wk 13 year 1988
AC-Adapter:   Origin of manufacture:  Italy
Precision:  13 Integrated circuits:  CD4805, CD4806
Memories:  1-16    
Program steps:  100-0 Courtesy of:  Joerg Woerner
Download leaflet:   (US: 1.1M Bytes)    

TI-65_P1.jpg (379468 Byte)The TI-65 Technical Analyst is a quite interesting calculator within the Galaxy-line. In addition to the functions of e.g. a TI-37 Galaxy it adds both programmability and a timer function. The resolution of the timer is one second, the maximum time before an overflow occurs about 40 hours. 

From the technology use this calculator is a unique composition:

Housing similar to the Galaxy
Keys like the later TI-68
Calculator chips from Texas Instruments, not Toshiba

TI-65_PCB.jpg (100783 Byte)Dismantling this TI-62 Galaxy manufactured in July 1987 by Texas Instruments in Rieti, Italy reveals a rather complex design based on a two TP0485 Microcontroller used in a Primary-Secondary Architecture known from the second generation slanted TI-60 calculator introduced in the same year.
Compare this calculator with the silver TI-62 Galaxy using a silver housing.

If you are interested in the calculating accuracy of scientific calculators don't miss the Calculator forensics.

The TI-65 Technical Analyst is featured in the Texas Instruments Incorporated bulletin CL-947A dated 1987 and Texas Instruments France SA leaflet ECD044F dated 1987.


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Joerg Woerner, December 5, 2001. No reprints without written permission.