Híradástechnika TI-57 LCD
Brief History
The Texas Instruments TI-57's successor, the TI-57 LCD was introduced in 1982. At this time, Híradástechnika still produced
the original version as PTK-1050. After solding out these, the italian version of the TI-57 LCD became the next calculator
assembled in Hungary.
| Manufacturer: | Híradástechnika Szövetkezet (Hungary) |
| OEM: | Texas Instruments (USA) |
| OEM model: | TI-57 LCD |
| Mfg. date: | 1984 |
| Size: | 7,8×14,6×2,4 cm |
| Weight (ready for operate): | 108 g |
| Price: | HUF 4.400 (TANÉRT, 1984) |
| Type: | programmable scientific |
| Capacity: | 8/8+2 digits (input/display) 11/11+2 digits (internal precision) |
| Operating logic: | AOS |
| CPU: | Texas Instruments TP0456N2L vagy CD4572BN2L + CD4555BNL |
| Registers: | 3 standard (with saving the pending operation) 15 bracket maximum of 7 memory (with aritmetic) |
| Features: | +/-change sign (direct entry of negative numbers) Ffloating-point notation Fixfixed-point notation: the listed decimals can be chosen (0-7) 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) DMS-DDconversion of decimal and sexagesimal numbers logexponential and logarithmical functions (10- and e-base) yxraising to power P-Rconverting coordinates between rectangular and polar systems n!factorial |
| Display: | 8+2+2 digit LCD |
| Power: | 2×LR44 |
| Programming method: | merged keystroke-programmable |
| Program capacity: | maximum of 48 steps |
| 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 3.006920635E-70 |
TI-57 LCD
Inside of the TI-57 LCD with flexible printed circuit
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