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74HC4053 数据表(PDF) 16 Page - NXP Semiconductors |
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74HC4053 数据表(HTML) 16 Page - NXP Semiconductors |
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16 / 17 page ![]() December 1990 16 Philips Semiconductors Product specification Triple 2-channel analog multiplexer/demultiplexer 74HC/HCT4053 TEST CIRCUIT AND WAVEFORMS Fig.20 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 VCC 50% <2 ns 6 ns 74HCT 3.0 V 1.3 V <2 ns 6 ns 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.21 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 VCC 50% <2 ns 6 ns 74HCT 3.0 V 1.3 V <2 ns 6 ns 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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