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DM74AS257N bảng dữ liệu(PDF) 4 Page - Fairchild Semiconductor |
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DM74AS257N bảng dữ liệu(HTML) 4 Page - Fairchild Semiconductor |
4 / 6 page www.fairchildsemi.com 4 DM74AS257 Switching Characteristics over recommended operating free air temperature range DM74AS258 Switching Characteristics over recommended operating free air temperature range Symbol Parameter From To Conditions Min Max Units tPLH Propagation Delay Time, Data Any VCC = 4.5V to 5.5V, 15.5 ns LOW-to-HIGH Level Output Y CL = 50 pF, tPHL Propagation Delay Time, RL = 500Ω 16 ns HIGH-to-LOW Level Output tPLH Propagation Delay Time, Select Any 211 ns LOW-to-HIGH Level Output Y tPHL Propagation Delay Time, 210 ns HIGH-to-LOW Level Output tPZH Output Enable Time to OUTPUT Any 27.5 ns HIGH Level Control Y tPZL Output Enable Time to 29.5 ns LOW Level tPHZ Output Disable Time, OUTPUT Any 1.5 6.5 ns from HIGH Level Control Y tPLZ Output Disable Time, 27 ns from LOW Level Symbol Parameter From To Conditions Min Max Units tPLH Propagation Delay Time, Data Any VCC = 4.5V to 5.5V, 15 ns LOW-to-HIGH Level Output Y CL = 50 pF, tPHL Propagation Delay Time, RL = 500Ω 14 ns HIGH-to-LOW Level Output tPLH Propagation Delay Time, Select Any 29.5 ns LOW-to-HIGH Level Output Y tPHL Propagation Delay Time, 210 ns HIGH-to-LOW Level Output tPZH Output Enable Time to OUTPUT Any 28 ns HIGH Level Control Y tPZL Output Enable Time to 210 ns LOW Level tPHZ Output Disable Time, OUTPUT Any 1.5 6 ns from HIGH Level Control Y tPLZ Output Disable Time, 26.5 ns from LOW Level |
Số phần tương tự - DM74AS257N |
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Mô tả tương tự - DM74AS257N |
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