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74ACT18825SSC Datasheet(PDF) 2 Page - Fairchild Semiconductor |
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74ACT18825SSC Datasheet(HTML) 2 Page - Fairchild Semiconductor |
2 / 6 page www.fairchildsemi.com 2 Functional Description The ACT18825 contains eighteen non-inverting buffers with 3-STATE standard outputs. The device is byte con- trolled with each byte functioning identically, but indepen- dently of the other. The control pins may be shorted together to obtain full 8-bit operation. The 3-STATE outputs are controlled by an Output Enable (OEn) input for each byte. When OEn is LOW, the outputs are in 2-state mode. When OEn is HIGH, the outputs are in the high impedance mode, but this does not interfere with entering new data into the inputs. Truth Table H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial Z = HIGH Impedance Logic Diagram Inputs Outputs Byte 1 (0:8) Byte 2 (8:17) I0–I8 I9–I17 O0–O8 O9–O17 OE1 OE2 OE3 OE4 LL L L H H H H HX L L X L Z L XH L L X H Z H LL H X L X L Z LL X H H X H Z HH H H X X Z Z LL L L L L L L |
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