DATAMATH CALCULATOR MUSEUM |
Additional Pictures
This TI-40 was manufactured
in October 1981 by Texas Instruments in Abilene, TX (Date code ATA 4581 » wk 45 yr 1981. |
The printed circuit board
(PCB) of this TI-40 manufactured in October 1981 with the CD4557 calculator circuit. |
This TI-40
manufactured a few weeks earlier in Italy uses the CD4507 calculator chip. |
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, October 9, 2002. No reprints without written permission.