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| 74VCX16501_04 |
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FAIRCHILD |
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2 page
www.fairchildsemi.com 2 Connection Diagram Pin Descriptions Function Table (Note 2) H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial (HIGH or LOW, inputs may not float) Z = High Impedance Note 2: A-to-B data flow is shown; B-to-A flow is similar but uses OEBA, LEBA and CLKBA. OEBA is active LOW. Note 3: Output level before the indicated steady-state input conditions were established. Note 4: Output level before the indicated steady-state input conditions were established, provided that CLKAB was HIGH before LEAB went LOW. Pin Names Description OEAB Output Enable Input for A to B Direction (Active HIGH) OEBA Output Enable Input for B to A Direction (Active LOW) LEAB, LEBA Latch Enable Inputs CLKAB, CLKBA Clock Inputs A1–A18 Side A Inputs or 3-STATE Outputs B1–B18 Side B Inputs or 3-STATE Outputs Inputs Outputs OEAB LEAB CLKAB An Bn LX X X Z HH X L L HH X H H HL ↑ LL HL ↑ HH HL H X B0 (Note 3) HL L X B0 (Note 4) |
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