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74AHC257 Datasheet(PDF) 6 Page - NXP Semiconductors |
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74AHC257 Datasheet(HTML) 6 Page - NXP Semiconductors |
6 / 20 page 2000 Apr 03 6 Philips Semiconductors Product specification Quad 2-input multiplexer; 3-state 74AHC257; 74AHCT257 RECOMMENDED OPERATING CONDITIONS LIMITING VALUES In accordance with the Absolute Maximum Rating System (IEC 60134); voltages are referenced to GND (ground = 0 V). Notes 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed. 2. For SO packages: above 70 °C the value of PD derates linearly with 8 mW/K. For TSSOP packages: above 60 °C the value of PD derates linearly with 5.5 mW/K. SYMBOL PARAMETER CONDITIONS 74AHC 74AHCT UNIT MIN. TYP. MAX. MIN. TYP. MAX. VCC DC supply voltage 2.0 5.0 5.5 4.5 5.0 5.5 V VI input voltage 0 − 5.5 0 − 5.5 V VO output voltage 0 − VCC 0 − VCC V Tamb operating ambient temperature see DC and AC characteristics per device −40 +25 +85 −40 +25 +85 °C −40 +25 +125 −40 +25 +125 °C tr,tf ( ∆t/∆V) input rise and fall time ratios VCC = 3.3 ±0.3 V −− 100 −−− ns/V VCC =5 ±0.5 V −− 20 −− 20 ns/V SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT VCC DC supply voltage −0.5 +7.0 V VI input voltage −0.5 +7.0 V IIK DC input diode current VI < −0.5 V; note 1 −−20 mA IOK DC output clamping diode current VO < −0.5 V or VO >VCC + 0.5 V; note 1 −±20 mA IO DC output sink current −0.5V<VO <VCC + 0.5 V −±25 mA ICC;IGND DC VCC or GND current −±75 mA Tstg storage temperature −65 +150 °C PD power dissipation per package for temperature range: −40 to +125 °C; note 2 − 500 mW |
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