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74AC11646 Datasheet(PDF) 3 Page - Texas Instruments |
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74AC11646 Datasheet(HTML) 3 Page - Texas Instruments |
3 / 9 page 74AC11646 OCTAL BUS TRANSCEIVER AND REGISTER WITH 3STATE OUTPUTS SCAS079A − JULY 1987 − REVISED APRIL 1993 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 POST OFFICE BOX 1443 • HOUSTON, TEXAS 77001 2−3 FUNCTION TABLE INPUTS DATA I/O OPERATION OR FUNCTION OE DIR CLKAB CLKBA SAB SBA A1 THRU A8 B1 THRU B8 OPERATION OR FUNCTION X X ↑ X X X Input † Unspecified† Store A, B unspecified† X XX ↑ XX Input Unspecified† Unspecified† Input Store A, B unspecified† Store B, A unspecified† H X ↑ ↑ X X Input Input Store A and B data H XL L X X Input Input disabled Input Input disabled Store A and B data Isolation, hold storage L L X X X L Output Input Real-time B data to A bus L LX L X H Output Output Input Input Real-time B data to A bus Stored B data to A bus L H X X L X Input Output Real-time A data to B bus L H L X H X Input Input Output Output Real-time A data to B bus Stored A data to B bus † The data output functions may be enabled or disabled by various signals at the OE and DIR inputs. Data input functions are always enabled; i.e., data at the bus pins will be stored on every low-to-high transition of the clock inputs. logic symbol‡ OE G3 1 3 EN2 [AB] G5 15 SBA A1 2 B1 20 4D 3 EN1 [BA] 14 DIR 16 CLKBA 28 CLKAB G7 27 SAB 5 7 7 5 1 1 6D ≥1 ≥1 1 2 C6 C4 B2 25 A2 3 B3 24 A3 4 B4 23 A4 5 B5 20 A5 10 B6 19 A6 11 B7 18 A7 12 B8 17 A8 13 ‡ This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. |
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