DATAMATH CALCULATOR MUSEUM
Texas Instruments TI-53
|Date of introduction:||August 1978||Display technology:||LCD|
|New price:||DM 115.00||Display size:||8 (5 + 2)|
|Size:|| 5.3" x 2.9" x
134 x 74 x 9 mm3
|Weight:||2.9 ounces, 82 grams||Serial No:||2970248|
|Batteries:||2*LR44||Date of manufacture:||wk 19 year 1982|
|AC-Adapter:||Origin of manufacture:||Italy|
|Program steps:||32||Courtesy of:||Joerg Woerner|
|Download manual:||(GB: 4.4 MByte)|
The TI-53 is not really a programmable calculator, it uses a small memory to hold up to 32 key-codes. Due to the low-power CMOS technology of its close relative TI-50 this memory won't lost its information if you turn the calculator off. Nevertheless this calculator could be called a classic, it was on the production line till the year 1985.
Simply by comparing the designation of the integrated circuits of the calculators you'll get the first members of the slimline family:
|• TP0320 (CD3201)
• TP0320 (CD3202) TI-30-II
• TP0321 TI-50
• TP0322 TI-Business Analyst-II
• TP0323 TI-53
• TP0324 TI-35
• TP0326 TI-38 and TI-20
This calculator was later available in the slanted housing of the TI-55-III. View it here.
In 1984 the era of the slimline calculators was over and Texas Instruments introduced a family of three calculators manufactured in Taiwan:
• TI-35 II
• BA II
Don't miss the rare Business Card, probably the missing calculator using one of the TP032x chips.
We discovered recently with the Sharp EL-503
a scientific calculator with the TP0327 single-chip calculator circuit, closing
the missing link between the TP0326 located in the TI-38 and the TP0328 known
from the Jeppesen Sanderson avstar.
If you have additions to the above article please email: email@example.com.
© Joerg Woerner, December 5, 2001. No reprints without written permission.