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SN54LVC646A, SN74LVC646A,pdf(O
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The SN54LVC646A octal bus transceiver and register is designed for 2.7-V to 3.6-V VCC operation, and the SN74LVC646A octal bus transceiver and register is designed for 1.65-V to 3.6-V VCC operation.
These devices consist of bus-transceiver circuits, D-type flip-flops, and control circuitry arranged for multiplexed transmission of data directly from the input bus or from the internal registers. Data on the A or B bus is clocked into the registers on the low-to-high transition of the appropriate clock (CLKAB or CLKBA) input. Figure 1 illustrates the four fundamental bus-management functions that are performed with the ’LVC646A devices.
Output-enable (OE)\ and direction-control (DIR) inputs control the transceiver functions.
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