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74F646 Datasheet(PDF) 1 Page - Fairchild Semiconductor |
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74F646 Datasheet(HTML) 1 Page - Fairchild Semiconductor |
1 / 6 page © 2004 Fairchild Semiconductor Corporation DS009580 www.fairchildsemi.com March 1988 Revised January 2004 74F646 Octal Transceiver/Register with 3-STATE Outputs General Description These devices consist of bus transceiver circuits with 3-STATE, 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 will be clocked into the registers as the appropriate clock pin goes to a high logic level. Control G and direction pins are provided to control the transceiver function. In the transceiver mode, data present at the high impedance port may be stored in either the A or the B register or in both. The select controls can multiplex stored and real-time (transparent mode) data. The direction control determines which bus will receive data when the enable control G is Active LOW. In the isolation mode (control G HIGH), A data may be stored in the B register and/or B data may be stored in the A register. Features s Independent registers for A and B buses s Multiplexed real-time and stored data s 74F646 has non-inverting data paths s 3-STATE outputs s 300 mil slim DIP Ordering Code: Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. Logic Symbols IEEE/IEC Connection Diagram Order Number Package Number Package Description 74F646SC M24B 24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide 74F646MSA MSA24 24-Lead Shrink Small Outline Package (SSOP), JEDEC MO-150, 5.3mm Wide 74F646SPC N24C 24-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide |
Similar Part No. - 74F646_04 |
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Similar Description - 74F646_04 |
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