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74ACT16245SSC Datasheet(PDF) 2 Page - Fairchild Semiconductor |
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74ACT16245SSC Datasheet(HTML) 2 Page - Fairchild Semiconductor |
2 / 6 page www.fairchildsemi.com 2 Functional Description The ACT16245 contains sixteen non-inverting bidirectional buffers with 3-STATE outputs. The device is byte controlled with each byte functioning identically, but independent of the other. The control pins can be shorted together to obtain full 16-bit operation. The following description applies to each byte. When the T/R input is HIGH, then Bus A data is transmitted to Bus B. When the T/R input is LOW, Bus B data is transmitted to Bus A. 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 Tables H HIGH Voltage Level L LOW Voltage Level X Immaterial Z High Impedance Logic Diagram Inputs Outputs OE1 T/R1 L L Bus B0–B7 Data to Bus A0–A7 L H Bus A0–A7 Data to Bus B0–B7 H X HIGH-Z State on A0–A7, B0–B7 Inputs Outputs OE2 T/R2 LL Bus B8–B15 Data to Bus A8–A15 LH Bus A8–A15 Data to Bus B8–B15 H X HIGH-Z State on A8–A15, B8–B15 |
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