National Semiconductor 4640
Manufacturer: | National Semiconductor Corporation (USA) |
Mfg. date: | 1976 |
Size: | 8×15,7×3,2 cm |
Weight (ready for operate): | 230 g |
Type: | scientific |
Capacity: | 10/10+2 digits (input/display) 12/12+2 digits (internal precision) |
Operating logic: | RPN |
CPU: | NSC MM5782N (CPU/RAM) + MM5751DJYN |
Registers: | 4 standard 3 memory (with aritmetic) |
Features: | %calculation with percent +/-change sign (direct entry of negative numbers) RVexchange registers (X-Y) Ffloating-point notation Fixfixed-point notation: the listed decimals can be chosen (0-9) Sciscientific (exponential) notation Engengineering 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 SDone variable statistics: calculating mean and standard deviation P-Rconverting coordinates between rectangular and polar systems n!factorial |
Display: | 14 digit LED (NSC NSA5140) |
Power: | 3×AA NiCd rechargeable battery (built-in) with E-05Dp charger |
Test results: | trigonometry:result of sin-1(cos-1(tan-1(tan(cos(sin(60°)))))), reference value: 60. 59.9999942989 exponential:result of 0.999160000, reference value (first 14 digits): 3.0068804206375×10-70 3.00687733293E-70 |
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