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LM12454 データシート(PDF) 8 Page - National Semiconductor (TI) |
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LM12454 データシート(HTML) 8 Page - National Semiconductor (TI) |
8 / 36 page Digital Characteristics (Notes 6, 7) The following specifications apply to the LM12454, LM12458, and LM12H458 for V A+=VD+ = 5V, unless otherwise specified. Boldface limits apply for T A =TJ =TMIN to TMAX; all other limits TA =TJ = 25˚C. Symbol Parameter Conditions Typical (Note 10) Limits (Note 11) Units V IN(1) Logical “1” Input Voltage V A+=VD+ = 5.5V 2.0 V (min) V IN(0) Logical “0” Input Voltage V A+=VD+ = 4.5V 0.8 V (max) I IN(1) Logical “1” Input Current V IN = 5V 0.005 1.0 µA (max) I IN(0) Logical “0” Input Current V IN = 0V −0.005 −1.0 µA (max) C IN D0–D15 Input Capacitance 6 pF V OUT(1) Logical “1” Output Voltage V A+=VD+ = 4.5V I OUT = −360 µA 2.4 V (min) I OUT = −10 µA 4.25 V (min) V OUT(0) Logical “0” Output Voltage V A+=VD+ = 4.5V I OUT = 1.6 mA 0.4 V (max) I OUT TRI-STATE® Output Leakage Current V OUT = 0V −0.01 −3.0 µA (max) V OUT = 5V 0.01 3.0 µA (max) Digital Timing Characteristics (Notes 6, 7, 8) The following specifications apply to the LM12454, LM12458, and LM12H458 for V A+=VD+ = 5V, tr =tf = 3 ns, and CL = 100 pF on data I/O, INT and DMARQ lines unless otherwise specified. Boldface limits apply for T A =TJ =TMIN to TMAX; all other limits T A =TJ = 25˚C. Symbol (See Figures 8, 9, 10) Parameter Conditions Typical (Note 10) Limits (Note 11) Units 1, 3 CS or Address Valid to ALE Low Set-Up Time 40 ns (min) 2, 4 CS or Address Valid to ALE Low Hold Time 20 ns (min) 5 ALE Pulse Width 45 ns (min) 6 RD High to Next ALE High 35 ns (min) 7 ALE Low to RD Low 20 ns (min) 8 RD Pulse Width 100 ns (min) 9 RD High to Next RD or WR Low 100 ns (min) 10 ALE Low to WR Low 20 ns (min) 11 WR Pulse Width 60 ns (min) 12 WR High to Next ALE High 75 ns (min) 13 WR High to Next RD or WR Low 140 ns (min) 14 Data Valid to WR High Set-Up Time 40 ns (min) 15 Data Valid to WR High Hold Time 30 ns (min) 16 RD Low to Data Bus Out of TRI-STATE 40 10 ns (min) 70 ns (max) 17 RD High to TRI-STATE R L =1k Ω 30 10 ns (min) 110 ns (max) 18 RD Low to Data Valid (Access Time) 30 10 ns (min) 80 ns (max) 20 Address Valid or CS Low to RD Low 20 ns (min) 21 Address Valid or CS Low to WR Low 20 ns (min) 19 Address Invalid from RD or WR High 10 ns (min) 22 INT High from RD Low 30 10 ns (min) 60 ns (max) 23 DMARQ Low from RD Low 30 10 ns (min) 60 ns (max) www.national.com 8 |
同様の部品番号 - LM12454_06 |
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同様の説明 - LM12454_06 |
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