DATAMATH CALCULATOR MUSEUM
Texas Instruments SR-56 Programmable
|Date of introduction:||1976||Display technology:||LED-stick|
|New price:||$139||Display size:||10 + 2|
|Size:|| 5.8" x 3.2" x
147 x 81 x 32 mm3
|Weight:||8.5 ounces, 240 grams||Serial No:||152051|
|Batteries:||BP1A||Date of manufacture:||wk 08 year 1977|
|AC-Adapter:||AC9130A||Origin of manufacture:||USA (LTA)|
|Precision:||12/13||Integrated circuits:||TMC0501, TMC0537, TMC0538. TMC0599|
|Program steps:||100||Courtesy of:||Joerg Woerner|
(US: 15.0M Bytes)
(US: 13.1M Bytes)
(US: 26.8M Bytes)
Introduced only few month after the SR-52 programmable, the SR-56 was it's small brother. The housing looked identical to the SR-51A, only the LRN-key gave you an idea of it's programmability. Compared to the SR-52 it uses only one instead of two memory-chips (the TMC0599), this reduced the possible program length from 224 steps to 100 steps. Main disadvantage was the lack of a permanent storage like a card reader or the continuous memory of the later TI-58C.
This calculator works with both the PC-100 and PC-100A printer cradle.
There are two different versions of the calculator reported, one with and one without the word "Programmable" under the SR-56 logo.
Fellow collectors - if you own a SR-56 please report us the serial number and date code on the back of the calculator for our SR-56 Database.
If you have additions to the above article please email: firstname.lastname@example.org.
© Joerg Woerner, December 5, 2001. No reprints without written permission.