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DM74LS670 Arkusz danych(PDF) 3 Page - Fairchild Semiconductor |
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DM74LS670 Arkusz danych(HTML) 3 Page - Fairchild Semiconductor |
3 / 6 page 3 www.fairchildsemi.com Absolute Maximum Ratings(Note 4) Note 4: The “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at these limits. The parametric values defined in the Electrical Characteristics tables are not guaranteed at the absolute maximum ratings. The “Recommended Operating Conditions” table will define the conditions for actual device operation. Recommended Operating Conditions Note 5: TA = 25°C and VCC = 5V. Note 6: Times are with respect to the Write-Enable input. Write-Select time will protect the data written into the previous address. If protection of data in the previous address, tSETUP (WA, WB) can be ignored. As any address selection sustained for the final 30 ns of the Write-Enable pulse and during tH (WA, WB) will result in data being written into that location. Depending on the duration of the input conditions, one or a number of previous addresses may have been written into. Note 7: Latch time is the time allowed for the internal output of the latch to assume the state of new data. This is important only when attempting to read from a location immediately after that location has received new data. Supply Voltage 7V Input Voltage 7V Operating Free Air Temperature Range 0 °C to +70°C Storage Temperature Range −65°C to +150°C Symbol Parameter Min Nom Max Units VCC Supply Voltage 4.75 5 5.25 V VIH HIGH Level Input Voltage 2 V VIL LOW Level Input Voltage 0.8 V IOH HIGH Level Output Current −2.6 mA IOL LOW Level Output Current 24 mA tW Write Enable Pulse Width (Note 5) 25 ns tSU Setup Time Data 10 ns (Note 5)(Note 6) WA, WB 15 tH Hold Time Data 15 ns (Note 5)(Note 6) WA, WB 5 tLATCH Latch Time for New Data (Note 5)(Note 7) 25 ns TA Free Air Operating Temperature 0 70 °C |
Podobny numer części - DM74LS670 |
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Podobny opis - DM74LS670 |
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