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74F845 数据表(PDF) 4 Page - Fairchild Semiconductor |
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74F845 数据表(HTML) 4 Page - Fairchild Semiconductor |
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4 / 6 page  www.fairchildsemi.com 4 AC Electrical Characteristics AC Operating Requirements Symbol Parameter TA = +25°CTA= 0°C to +70°C Units VCC = +5.0V VCC = +5.0V CL = 50 pF CL = 50 pF Min Typ Max Min Max tPLH Propagation Delay 2.5 4.8 8.0 2.0 9.0 ns tPHL Dn to On 1.5 3.6 6.5 1.5 7.0 tPLH Propagation Delay 5.0 8.1 12.0 4.5 13.5 ns tPHL LE to On 2.0 4.4 7.5 2.0 8.0 tPLH Propagation Delay 3.0 5.9 10.0 2.5 11.0 ns PRE to On tPHL Propagation Delay 3.0 6.5 10.0 2.5 11.0 ns CLR to On tPZH Output Enable Time 2.5 5.8 9.5 2.0 10.5 ns tPZL OE to On 2.5 7.6 12.0 2.0 13.0 tPHZ Output Disable Time 1.0 3.1 7.5 1.0 8.5 ns tPLZ OE to On 1.0 2.8 6.5 1.0 7.5 Symbol Parameter TA = +25°CTA= 0°C to +70°C Units VCC = +5.0V VCC = +5.0V Min Max Min Max tS(H) Setup Time, HIGH or LOW 2.0 2.5 ns tS(L) Dn to LE 2.0 2.5 tH(H) Hold Time, HIGH or LOW 2.5 3.0 ns tH(L) Dn to LE 3.0 3.5 tW(H) LE Pulse Width, HIGH 4.0 4.0 ns tW(L) PRE Pulse Width, LOW 5.0 5.0 ns tW(L) CLR Pulse Width, LOW 5.0 5.0 ns tREC PRE Recovery Time 10.0 10.0 ns tREC CLR Recovery Time 12.0 13.0 ns |
类似零件编号 - 74F845 |
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类似说明 - 74F845 |
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