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HCF4029BC1 Datasheet(PDF) 2 Page - STMicroelectronics |
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HCF4029BC1 Datasheet(HTML) 2 Page - STMicroelectronics |
2 / 13 page counter reaches its maximum count in the UP mode or the minimum count in the DOWN mode provided the CARRY-IN signal is low. The CARRY-IN signal in the low state can thus be considered a CLOCK ENABLE. The CARRY-IN terminal must be con- nected to VSS when not in use. Binary counting is ac- complished when the BINARY/DECADE input is high ; the counter counts in the decade mode when the BINARY/DECADE input is low. The counter counts Up when to UP/DOWN INPUT is high, and Down when the UP/DOWN INPUT is low. Multiple packages can be connected in either a parallel- clocking or a ripple-clocking arrangement as shown in cascading counter packages. Parallel clocking provides synchronous control and hence faster re- sponse from all counting outputs. Ripple-clocking allows for longer clock input rise and fall times. FUNCTIONAL DIAGRAM ABSOLUTE MAXIMUM RATING Symbol Parameter Value Unit VDD * Supply Voltage: HCC Types HCF Types -0.5 to +20 -0.5 to +18 V V Vi Input Voltage -0.5 to VDD + 0.5 V II DC Input Current (any one input) ± 10 mA Ptot Total Power Dissipation (per package) Dissipation per Output Transistor for Top = Full Package Temperature Range 200 100 mW mW Top Operating Temperature: HCC Types HCF Types -55 to +125 -40 to +85 oC oC Tstg Storage Temperature -65 to +150 oC Stresses above those listed under ”Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress ratingonly 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 voltage values are referred to VSS pin voltage. HCC/HCF4029B 2/13 |
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