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LS7290 Datasheet(PDF) 3 Page - LSI Computer Systems |
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LS7290 Datasheet(HTML) 3 Page - LSI Computer Systems |
3 / 9 page 7290-072011-3 ABSOLUTE MAXIMUM RATINGS: PARAMETER SYMBOL VALUE UNIT DC Supply Voltage VDD - VSS +7 V Any Input Voltage VIN VSS – 0.3 to VDD + 0.3 V Operating Temperature TA -20 to +85 °C Storage Temperature TSTG -85 to +150 °C ELECTRICAL SPECIFICATIONS (-25 °C < TA < +85°C) PARAMETER SYMBOL MIN TYP MAX UNIT CONDITIONS Supply Voltage VDD 3.0 - 5.5 V - Supply Current IDD - - 2.0 mA Outputs floating, Inputs high CLK frequency fc 8.0 - MHz - Enable Propagation Delay tepd 100 - - ns - FRD/RVRS Setup Time (before step pulse) tds 0 - - μs - Step Pulse Width SPW 1.0 - - μs at fc = 8 MHz Interstep Pulse Delay ISD 32 - - μs at fc = 8 MHz Interstep Phase Blanking IPB 1.25 - 5.0 μs at fc = 8 MHz Reset Pulse Width RPW 1.0 - - μs at fc = 8 MHz Reset to Step Pulse Delay trs 0 - - μs - Hi-Level Input Voltage VIH 2 - - V VDD = 5 ± 0.25V Low-Level Input Voltage VIL - - 0.8 V VDD = 5 ± 0.25V High-Level Input Current IH - - 50 nA Leakage Current Low-Level Input Current IL - - 50 nA Leakage Current Output Sink Current IO -10 - - mA VO = 0.4V, VDD = 5V IO -5 - - mA VO = 0.4V, VDD = 3.3V Output Source Current IO 5 - - mA VO = 4V, VDD = 5V IO 2.5 - - mA VO = 2.5V, VDD = 3.3V Comparator Offset Voltage VOS - 5 15 mV VREF = 1V Input Reference Voltage VREF 0.5 - 3.0 V VDD = 5V VREF 0.5 - 1.5 V VDD = 3.3V fc ~ 1/5RC At VDD = 5V and R = 2.2 k Ω, C = 12pF, oscillator frequency is 8 MHz (typical). FIGURE 3. RC OSCILLATOR FOR CLOCK GENERATOR |
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