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LM78 数据表(PDF) 9 Page - National Semiconductor (TI) |
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LM78 数据表(HTML) 9 Page - National Semiconductor (TI) |
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9 / 31 page ![]() AC Electrical Characteristics(Note 13) The following specifications apply for +4.25 V DC ≤ VCC ≤ +5.75 VDC unless otherwise specified. Boldface limits apply for T A =TJ =TMIN to TMAX; all other limits TA =TJ = 25˚C. (Continued) Symbol Parameter Conditions Typical Limits Units (Note 8) (Note 9) (Limits) SERIAL BUS TIMING CHARACTERISTICS t 1 SCL (Clock) Period 2.5 µs (min) t 2 Data In Setup Time to SCL High 100 ns (min) t 3 Data Out Stable After SCL Low 0 ns (min) t 4 SDA Low Setup Time to SCL Low (start) 100 ns (min) t 5 SDA High Hold Time After SCL High (stop) 100 ns (min) DS012873-6 FIGURE 3. Serial Bus Timing Diagram www.national.com 9 |
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