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74HC257 Arkusz danych(PDF) 4 Page - NXP Semiconductors |
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74HC257 Arkusz danych(HTML) 4 Page - NXP Semiconductors |
4 / 17 page 74HC_HCT257_5 © NXP B.V. 2010. All rights reserved. Product data sheet Rev. 05 — 13 January 2010 4 of 17 NXP Semiconductors 74HC257; 74HCT257 Quad 2-input multiplexer; 3-state 5. Pinning information 5.1 Pinning 5.2 Pin description 6. Functional description 6.1 Function table [1] H = HIGH voltage level; L = LOW voltage level; X = don’t care; Z = high-impedance OFF-state. Fig 5. Pin configuration DIP16, SO16, SSOP16 and TSSOP16 74HC257 74HCT257 S VCC 1I0 OE 1I1 4I0 1Y 4I1 2I0 4Y 2I1 3I0 2Y 3I1 GND 3Y 001aad499 1 2 3 4 5 6 7 8 10 9 12 11 14 13 16 15 Table 2. Pin description Symbol Pin Description S 1 common data select input 1I0 to 4I0 2, 5, 11, 14 data input from source 0 1I1 to 4I1 3, 6, 10, 13 data input from source 1 1Y to 4Y 4, 7, 9, 12 3-state multiplexer output GND 8 ground (0 V) OE 15 3-state output enable input (active LOW) VCC 16 supply voltage Table 3. Function table[1] Control Input Output OE S nl0 nl1 nY H X X X Z L H X L L L H X H H L L L X L L L H X H |
Podobny numer części - 74HC257 |
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Podobny opis - 74HC257 |
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