Texas Instruments TI-2400 Phone Bank

Date of introduction:  1988 Display technology:  LCD 
New price:  $30.00 (SRP 1988) Display size:  7 char + 12 digits 
Size:  2.5" x 4.0" x 0.4"    
Weight:  2 ounces Serial No:  
Batteries:  CR2016 Date of manufacture:  mth 09 year 1989
AC-Adapter:   Origin of manufacture:  Taiwan
Precision:  8 Integrated circuits:  CPU: Toshiba T9752
 RAM: Sanyo LC3518
Memories:  2.85kB RAM    
Program steps:   Courtesy of:  Joerg Woerner
    Download manual:   (US: 1.9 MByte)

Texas Instruments introduced in 1988 this powerful Phone Bank. The memory capacity of 2.85k Byte RAM holds as much as 150 names and the associated phone number, anniversary date or similar. 

In the calculator mode the TI-2400 Phone Bank provides the four basic functions and a memory.

TI-2400_DISP.jpg (25926 Byte)Main disadvantage of the TI-2400 is the small display. 

TI-2400_PCB.jpg (136252 Byte)
The internal construction of the TI-2400 is typical for the whole line of TI organizers. A 8-bit microcomputer system based on a Toshiba microcontroller surrounded by 8k Byte RAM. A similar construction was later used with the TI-2100 Pocket Info.

The TI-3100 Pocket Dialer combined the Databank feature with a small loudspeaker to generate the multi-frequency dial tones.

Texas Instruments launched in 1987 a very innovative product line with the TI-2400 Phone Bank, TI-2600 Personal Banker, TI-2700 Mini Data Bank, and TI-2800 Paperless Printer followed till 1990 with the TI-2100 Pocket Info, TI-2900 Info Bank, TI-3100 Pocket Dialer, TI-3200 Pro Dialer, and TI-3400 EUROPA.

If you know the history of Texas Instruments it seems to commemorate the introduction of the TI-2500 Datamath a quarter century ago.

The TI-2400 Phone Bank is featured in the Texas Instruments Incorporated leaflet Pocket Solutions (CL-1059) dated 1990.


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If you have additions to the above article please email:

Joerg Woerner, May 9, 2002. No reprints without written permission.