SN74BCT646 Datasheet | Texas Instruments

description /ordering information - No internal connection 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 can be performed with the ’BCT646 devices. Output-enable (OE) and direction-control (DIR) inputs are provided to control the transceiver functions. In the transceiver mode, data present at the high-impedance port can be stored in either register or in both. The select-control (SAB and SBA) inputs can multiplex stored and real-time (transparent mode) data. The direction control (DIR) determines which bus will receive data when OE is low. In the isolation mode (OE high), A data can be stored in one register and/or B data can be stored in the other register. ORDERING INFORMATION PACKAGE† ORDERABLE PART NUMBER TOP-SIDE MARKING PDIP - NT Tube SN74BCT646NT SN74BCT646NT 0°C to 70°C SOIC - DW Tube Tape and reel SN74BCT646DW SN74BCT646DWR BCT646 CDIP - JT Tube SNJ54BCT646JT SNJ54BCT646JT - 55°C to 125°C CFP - W Tube SNJ54BCT646W SNJ54BCT646W LCCC - FK Tube SNJ54BCT646FK SNJ54BCT646FK † Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at .ti./sc/package. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data...