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SN74ABT652DB Arkusz danych(PDF) 2 Page - Texas Instruments |
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SN74ABT652DB Arkusz danych(HTML) 2 Page - Texas Instruments |
2 / 11 page SN54ABT652, SN74ABT652 OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS SCBS070D – JULY 1991 – REVISED JULY 1994 2–2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 description (continued) The SN54ABT652 is characterized for operation over the full military temperature range of – 55 °C to 125°C. The SN74ABT652 is characterized for operation from – 40 °C to 85°C. FUNCTION TABLE INPUTS DATA I/O† OPERATION OR FUNCTION OEAB OEBA CLKAB CLKBA SAB SBA A1 THRU A8 B1 THRU B8 OPERATION OR FUNCTION L H H or L H or L X X Input Input Isolation L H ↑↑ X X Input Input Store A and B data X H ↑ H or L X X Input Unspecified‡ Store A, hold B H H ↑↑ X‡ X Input Output Store A in both registers L X H or L ↑ X X Unspecified‡ Input Hold A, store B L L ↑↑ XX‡ Output Input Store B in both registers L L X X X L Output Input Real-time B data to A bus L L X H or L X H Output Input Stored B data to A bus H H X X L X Input Output Real-time A data to B bus H H H or L X H X Input Output Stored A data to B bus H L H or L H or L H H Output Output Stored A data to B bus and stored B data to A bus † The data output functions may be enabled or disabled by a variety of level combinations at the OEAB or OEBA inputs. Data input functions are always enabled; i.e., data at the bus pins is stored on every low-to-high transition on the clock inputs. ‡ Select control = L; clocks can occur simultaneously. Select control = H; clocks must be staggered in order to load both registers. |
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