DATAMATH  CALCULATOR  MUSEUM

Exactra 22 by Texas Instruments 

Date of introduction:  October 1974 Display technology:  LED-stick w/o lens
New price:   Display size:  8
Size:  5.1" x 2.9" x 1.3"
 130 x 74 x 34 mm3
   
Weight:  5.1 ounces, 144 grams Serial No:  2200004547
Batteries:  3*AA  Date of manufacture:  wk 44 yr 1974
AC-Adapter:  AC9160 Origin of manufacture:  USA
Precision:   Integrated circuits:  TMS0803
Memories:      
Program steps:   Courtesy of:  Joerg Woerner

The Exactra 22 is yet another member in the Exactra line from Texas Instruments. Compared to the Exactra 21 you'll notice an additional connector for an external power supply.

Dismantling the Exactra 22 revealed a small surprise, the LED-display found in this particular calculator was manufactured by Bowmar. We know the Opto-Stick display with its small numbers already from the TI-2500B. Don't miss an overview of all Exactra Calculator LED Displays.

The printed circuit board (PCB) of the Exactra 22 seems to use similar schematics as the Exactra 21 but a different layout to accommodate the extra power connector.

Don't miss the Exactra 23 loaded with all features.



 

horizontal rule

If you have additions to the above article please email: joerg@datamath.org.

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