Texas Instruments TI-30 (2)
Brief History
In 1980 Texas Instruments announced the successor of the famous TI-30 which have been in production since 1976. The liquid crystal display used in this calculator decreased power consumption, the new IC allowed retaining memory contents upon power-off and adding some functionality (conversion of angles and computing factorials), but due to quick oxidation of the materials used in the Klixon-style keyboard made this model very unreliable. Keyboards made of conducting rubber used in japanese calculators had excellent abilities, so Texas decided to utilize this technology in the next generation of calculators. The cooperation between Texas and Toshiba made very reliable and comfortable calculators: the TI-30-III in 1984, and one year after the new TI-30, which have been in production for years.
| Manufacturer: | Texas Instruments (USA/Italy) |
| Mfg. date: | 1990-92 |
| Size: | 7,1×13,4×1,1 cm |
| Weight (ready for operate): | n.a. |
| Type: | scientific |
| Capacity: | 8/5+2 digits (input/display) 11+2 digits (internal precision) |
| Operating logic: | AOS |
| CPU: | Texas Instruments CD4565AN2S |
| Registers: | 3 standard (with saving the pending operation) 1 constant (with saving the pending operation) 15 bracket (with saving the pending operation) 1 memory (with aritmetic) |
| Features: | %calculation with percent +/-change sign (direct entry of negative numbers) Ffloating-point notation Sciscientific (exponential) notation Sqrsquare root x2square pivalue of pi (3.1415..) can be recalled 1/xreciprocal trigtrigonometrical functions (sin, cos, tan and inverses: arcsin, arccos, arctan) logexponential and logarithmical functions (10- and e-base) yxraising to power n!factorial |
| Display: | 8+1 digit LCD |
| Power: | 2×LR44 button cell |
| Test results: | trigonometry:result of sin-1(cos-1(tan-1(tan(cos(sin(60°)))))), reference value: 60. 60.019845215 exponential:result of 0.999160000, reference value (first 14 digits): 3.0068804206375×10-70 3.0069206E-70 |
1990 version of TI-30
TI-30 PCB is identical to TI-30 STAT
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