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74HC138DB 数据表(PDF) 9 Page - NXP Semiconductors |
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74HC138DB 数据表(HTML) 9 Page - NXP Semiconductors |
9 / 19 page 74HC_HCT138 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2012. All rights reserved. Product data sheet Rev. 4 — 27 June 2012 9 of 19 NXP Semiconductors 74HC138; 74HCT138 3-to-8 line decoder/demultiplexer; inverting 11. Waveforms Measurement points are given in Table 8. VOL and VOH are typical voltage output levels that occur with the output load. Fig 6. Propagation delay input (An) and enable input (E3) to output (Yn) and transition time output (Yn) mna373 An, E3 input Yn output tPHL tTHL tPLH GND VCC VM VM VOH VOL tTLH Measurement points are given in Table 8. VOL and VOH are typical voltage output levels that occur with the output load. Fig 7. Propagation delay enable input (En) to output (Yn) and transition time output (Yn) mna374 E1, E2 input Yn output tPHL tPLH GND VCC VM VM VOH VOL tTHL tTLH Table 8. Measurement points Type Input Output VM VM 74HC138 0.5VCC 0.5VCC 74HCT138 1.3 V 1.3 V |
类似零件编号 - 74HC138DB |
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类似说明 - 74HC138DB |
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