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HCF40181B Datasheet(PDF) 2 Page - STMicroelectronics |
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HCF40181B Datasheet(HTML) 2 Page - STMicroelectronics |
2 / 12 page P for the four bits of the HCC/HCF40181B. Use of the HCC/HCF40182B look-ahead carry generator in conjunction with multiple HCC/HCF40181B’s per- mits high-speed arithmetic operations on long words. A ripple carry output Cn+ 4 is available for use in systems where speed is not of primary import- ance. Also included in the HCC/HCF40181B is a comparator output A = B, which assumes a high level whenever the two four-bit input words A and B are equal and the device is in the subtract mode. In addition, relative magnitude information may be derived from the carry-in input Cn and ripple carry- out output Cn+ 4 by placing the unit in the subtract mode and externally decoding using the information in table II. The HCC/HCF40181B is similar to indus- try types MC 14581 and 74181. FUNCTIONAL DIAGRAM Active-low Data. Active-high Data. ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit V DD* Supply Voltage : HC C Types HCF Types – 0.5 to + 20 – 0.5 to + 18 V V Vi Input Voltage – 0.5 to VDD + 0.5 V I I DC Input Current (any one input) ± 10 mA Pto t Total Power Dissipation (per package) Dissipation per Output Transistor for Top = Full Package-temperature Range 200 100 mW mW T op Operating Temperature : HCC Types HCF Types – 55 to + 125 –40 to + 85 °C °C T stg Storage Temperature – 65 to + 150 °C Stresses above those listed under ”Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for external periods may affect device reliability. * All voltages are with respect to VSS (GND). HCC/HCF40181B 2/12 |
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