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74HCT257DB 数据表(PDF) 5 Page - NXP Semiconductors |
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74HCT257DB 数据表(HTML) 5 Page - NXP Semiconductors |
5 / 17 page 74HC_HCT257_5 © NXP B.V. 2010. All rights reserved. Product data sheet Rev. 05 — 13 January 2010 5 of 17 NXP Semiconductors 74HC257; 74HCT257 Quad 2-input multiplexer; 3-state 7. Limiting values [1] For DIP16 packages: above 70 °C, P tot derates linearly with 12 mW/K. [2] For SO16 packages: above 70 °C, P tot derates linearly with 8 mW/K. [3] For SSOP16 and TSSOP16 packages: above 60 °C, P tot derates linearly with 5.5 mW/K. 8. Recommended operating conditions Table 4. Limiting values In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V). Symbol Parameter Conditions Min Max Unit VCC supply voltage −0.5 +7 V IIK input clamping current VI < −0.5 V or VI > VCC + 0.5 V - ±20 mA IOK output clamping current VO < −0.5 V or VO > VCC + 0.5 V - ±20 mA IO output current VO = −0.5 V to VCC + 0.5 V - ±35 mA ICC supply current - +70 mA IGND ground current - −70 mA Tstg storage temperature −65 +150 °C Ptot total power dissipation DIP16 package [1] - 750 mW SO16 package [2] - 500 mW SSOP16 package [3] - 500 mW TSSOP16 package [3] - 500 mW Table 5. Recommended operating conditions Symbol Parameter Conditions Min Typ Max Unit Type 74HC257 VCC supply voltage 2.0 5.0 6.0 V VI input voltage 0 - VCC V VO output voltage 0 - VCC V Δt/ΔV input transition rise and fall rates VCC = 2.0 V - - 625 ns VCC = 4.5 V - 1.67 139 ns VCC = 6.0 V - - 83 ns Tamb ambient temperature −40 - +125 °C Type 74HCT257 VCC supply voltage 4.5 5.0 5.5 V VI input voltage 0 - VCC V VO output voltage 0 - VCC V Δt/ΔV input transition rise and fall rates VCC = 4.5 V - 1.67 139 ns Tamb ambient temperature −40 - +125 °C |
类似零件编号 - 74HCT257DB |
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类似说明 - 74HCT257DB |
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