DATAMATH CALCULATOR MUSEUM
Texas Instruments SR-16
|Date of introduction:||October 25, 1974||Display technology:||LED modules + lens|
|New price:||$99.95, DM 298.00||Display size:||8 + 2|
|Size:|| 6.3" x 3.1" x
158 x 78 x 38 mm3
|Weight:||9.2 ounces, 262 grams||Serial No:||114394|
|Batteries:||3*AA NiCd||Date of manufacture:||wk 35 year 1975|
|AC-Adapter:||AC9200, AC9130A||Origin of manufacture:||USA|
|Program steps:||Courtesy of:||Joerg Woerner|
|Download manual:||(US: 4.4M Bytes)|
The electronic slide rule SR-16 was the last calculator using the extreme wedge shaped housing of the SR-10 and SR-11. It was superseded by the SR-16 II in a more conventional housing within one year.
With the SR-40 prototype an upgraded version of the SR-16 II was developed but never introduced to the market.
The colorful design of the SR-11 was dropped for a style similar to the later SR-50A. Technically the calculator was very similar to its predecessors, one interesting feature could be found in the higher accuracy of some calculations. If you are interested in the calculating accuracy of scientific calculators, don't miss the Calculator forensics.
The internal construction of the SR-16 is similar to the late SR-10 Version 3, compare them for yourself.
The featured SR-16 with Date code 355 from the final production run was manufactured in August 1975 by Texas Instruments in their Lubbock, TX facility. Dismantling this SR-16 reveals a design centered centered around a TMS1001single-chip calculator circuit and supported by two digit drivers for the 12-digit LED display and powered by three AA-sized rechargeable NiCd batteries od disposable alakaline batteries. Please notice the rather unusual display compared to earlier versions of the SR-10, SR-11, and SR-16 calculators.
Today the SR-16 could be called an historically important and rare calculator. Interested in really rare calculators? Don't miss the TI-150!
used with this calculator was the first LSI MOS
chip of the TMS1000 Microcomputer family.
The picture at the right gives you a comparison between the first TMS1000 based calculator chip and one of the last ones found in a TI-30 STAT manufactured 13 years later. In the meantime we located a BA-35 Business Analyst manufactured in 1996 using a CD4571B based on the TMS1000 family, too and giving the architecture a lifespan of 22 years.
If you have additions to the above article please email: firstname.lastname@example.org.
© Joerg Woerner, December 5, 2001. No reprints without written permission.