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74HC4051 Datasheet(PDF) 15 Page - NXP Semiconductors |
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74HC4051 Datasheet(HTML) 15 Page - NXP Semiconductors |
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15 / 16 page  December 1990 15 Philips Semiconductors Product specification 8-channel analog multiplexer/demultiplexer 74HC/HCT4051 TEST CIRCUIT AND WAVEFORMS Fig.19 Test circuit for measuring AC performance. Conditions TEST SWITCH Vis tPZH tPZL tPHZ tPLZ others VEE VCC VEE VCC open VCC VEE VCC VEE pulse FAMILY AMPLITUDE VM tr; tf fmax; PULSE WIDTH OTHER 74HC 74HCT VCC 3.0 V 50% 1.3 V < 2ns < 2ns 6ns 6ns CL = load capacitance including jig and probe capacitance (see AC CHARACTERISTICS for values). RT = termination resistance should be equal to the output impedance ZO of the pulse generator. tr =tf = 6 ns; when measuring fmax, there is no constraint to tr, tf with 50% duty factor. Fig.20 Input pulse definitions. Conditions TEST SWITCH Vis tPZH tPZL tPHZ tPLZ others VEE VCC VEE VCC open VCC VEE VCC VEE pulse FAMILY AMPLITUDE VM tr; tf fmax; PULSE WIDTH OTHER 74HC 74HCT VCC 3.0 V 50% 1.3 V < 2ns < 2ns 6ns 6ns CL = load capacitance including jig and probe capacitance (see AC CHARACTERISTICS for values). RT = termination resistance should be equal to the output impedance ZO of the pulse generator. tr =tf = 6 ns; when measuring fmax, there is no constraint to tr, tf with 50% duty factor. |
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