DATAMATH CALCULATOR MUSEUM
Texas Instruments TI-5040 (Version 1)
|Date of introduction:||June 1976||Display technology:||Fluorescent|
|New price:|| $149.95, £109.95
|Size:||9.5" x 9.2" x 2.7"||Printer technology:||Thermal TP-20225, TP-27225|
|Weight:||3 pounds 5 ounces||Serial No:||3931052|
|Batteries:||Date of manufacture:||wk 13 year 1978|
|AC-Adapter:||120 V||Origin of manufacture:||USA (LTA)|
|Precision:||10||Integrated circuits:||TMC1115 (ZA0351), TMC1276|
|Memories:||1 + 1|
|Program steps:||Courtesy of:||Joerg Woerner|
|Download manual:||(US: 6.0M Bytes)|
It took a long time between the first calculator based on TI's thermal printer technology - the Canon Pocketronic - and this TI-5040 desktop printing desktop calculator. Introduced in 1976 it features both a 10-digit vacuum fluorescent display (VFD) and a quiet, convenient thermal printer. Together with a 4-key memory this calculator defined the standard in its class.
This calculator was a great success for Texas Instruments, it was manufactured more than 5 years before its successor, the TI-5142 was introduced. Later models like the TI-5040 II or the TI-5130 had shorter life cycles.
Dismantling this TI-5040 manufactured in March 1978 by Texas Instruments in Lubbock, Texas reveals a designed centered around two members of the famous TMS1000 Microcomputer family. The first chip labeled TMC1115 is manufactured in PMOS (p-channel metal-oxide-semiconductor) technology similar to the original Canon Pocketronic and features 2k*8 Bits ROM plus 128*4 bits RAM in a 28-pin DIP (Dual In-line Package) housing while the second chip labeled TMS1276 combines half the memory capacity (1k*8 Bits ROM and 64*4 bits RAM) with some extra Input/Output lines and drivers for the VFD in a 40-pin DIP housing.
The internal design of the TI-5040 was optimized in 1978 to a single-chip design based on the TMC0260 family.
While the overall appearance of the TI-5040 didn't change, offers the bottom-side of the housing an easy indication of the Version of the TI-5040:
• Version 1: Printed label
with manufacturer/model info in the center of the housing.
No cut-out for the printer paper roll
• Version 2: Manufacturer/model info molded into the left side of the housing.
Cut-out for the printer paper roll on the right side of the housing
The style of the keyboard and some design elements of the TI-5040 were adopted both by non-printing calculators like the TI-5100 and print-only calculators like the TI-5015.
The TI-5220 printing desktop calculator with similar specifications but sporting a 12 digits display was introduced in 1977 together with its huge sibling TI-5225. Don't miss the TI-5135 introduced in 1980.
The first portable printing calculator TI-5050 appeared one year earlier on the market.
Even Texas Instruments never mentioned the rare TI-500, a printing calculator introduced already in 1974.
Offers the best of two worlds. An easy-to-read display. A printed tape.
© Texas Instruments, 1981
If you have additions to the above article please email: firstname.lastname@example.org.
© Joerg Woerner, December 5, 2001. No reprints without written permission.