Texas Instruments TI-4000

Date of introduction:  1973 Display technology:  Panaplex II
New price:  $139.95 Display size:  12
Size:  8.3 x 6.3 x 2.5"
 210 x 159 x 63 mm3
Weight:  36.1 ounces, 1024 grams Serial No:  190728
Batteries:   Date of manufacture:  wk 25 year 1974
AC-Adapter:  120 V Origin of manufacture:  USA
Precision:  12 Integrated circuits:  TMS0201, TMS0301
Memories:  1    
Program steps:   Courtesy of:  Joerg Woerner

Think about a fully loaded TI-3500 if you discover the TI-4000. This calculator gives you a display and calculating capacity of 12 digits, a full 4-key memory and the important %-function. 

Due to the limited digit capabilities of the TMS0100 calculator-on-a-chip series, Texas Instruments developed the TMS0200 Chipset for 12-digit desktop calculators. This TI-4000 introduced in 1973 marks the first application based on the TMS0200 Building Blocks and makes use of the TMS0200 Data Chip named TMS0201 and the TMS0300 ROM Chip named TMS0301 accordingly. Later designs added either the TMS0220 Printer Chip (TI-500), or the TMC0400 ROM/Register Chip (SR-22), or both of them (TI-620).

Texas Instruments made the TMS0200 Building Blocks available to third parties, don't miss the Canon L121F.

Compare the styling of this TI-4000 with the uncommon but otherwise identical TI-410.

A more powerful desktop calculator with a similar architecture was introduced with the TI-450.

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