Texas Instruments TI-74S

Date of introduction:  1986 Display technology:  LCD dot matrix
New price:   Display size:  31
Size:  3.8" x 8.0" x 1.0"
 96 x 204 x 25 mm3
Weight:  10.3 ounces, 290 grams Serial No:  0009790
Batteries:  4*AAA Date of manufacture:  mth 06 year 1987
AC-Adapter:   Origin of manufacture:  Taiwan
Precision:  13/14 Integrated circuits:  CPU: TMC70009
 ROM: HN61256
 RAM: HM6264
Memories:  8kB RAM, 32kB ROM    
Program steps:   Courtesy of:  Otto Herzig
Download leaflet:   (US: 1 001 kB)    

A special OEM version of the TI-74 Basicalc. This one was sold to the German assurance company Hamburg-Mannheimer and usually used together with the PC-324 battery operated printer.

TI-74S_Conti.jpg (33190 Byte)The TI-74S followed the TI-58 concept with the
Solid State Software Modules™ and introduced customized ROM-modules that fitted into the slot on the right side of the display. 

TI-74S_EPROM.jpg (22880 Byte)The modules are programmable with an additional tool and could be erased with an UV light source.

TI-74S_BOX.jpg (79711 Byte)Main customers of the TI-74S were assurance and insurance companies. Some applications used a lot of different modules in boxes holding four of them, each.

Don't miss the TI-74S ALLIANZ with translated key legends and this TI-74S with bilingual key legends.

TI-74S_PCB.jpg (25769 Byte)Dismantling the TI-74S reveals the well known electronics of the TI-74 Basicalc. Even the printed circuit boards (PCB's) are identical.
Don't miss the TI-78, the perfect evolution of the TI-74S.

The TI-74S is featured in the Texas Instruments Incorporated bulletin CL-1000 dated 1989.


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