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HCF40193B Scheda tecnica(PDF) 2 Page - STMicroelectronics |
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HCF40193B Scheda tecnica(HTML) 2 Page - STMicroelectronics |
2 / 15 page is high. The CARRY and BORROW signals are high when the counter is counting up or down. The CARRY signal goes low one-half clock cycle after the counter reaches its maximum count in the count- up mode. The BORROW signal goes low one-half clock cycle after the counter reaches its minimum count in the count-down mode. Cascading of multiple packages is easily accomplished without the need for additional external circuitry by tying the BORROW and CARRY outputs to the CLOCK DOWN and CLOCK UP inputs, respectively, of the succeeding package. FUNCTIONAL DIAGRAM 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). RECOMMENDED OPERATING CONDITIONS Symbol Parameter Value Unit VDD Supply Voltage : HCC Types HCF Types 3to 18 3to 15 V V VI Input Voltage 0 to VDD V T op Operating Temperature : HCC Types HCF Types – 55 to + 125 –40 to + 85 °C °C HCC/HCF40192B/193B 2/15 |
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