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SN74ALS677A датащи(PDF) 1 Page - Texas Instruments |
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SN74ALS677A датащи(HTML) 1 Page - Texas Instruments |
1 / 7 page SN74ALS677A 16BIT ADDRESS COMPARATOR SDAS012C − JUNE 1982 − REVISED JANUARY 1995 Copyright 1995, Texas Instruments Incorporated 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443 • 16-Bit Address Comparator With Enable • Package Options Include Plastic Small-Outline (DW) Packages and Standard Plastic (NT) 300-mil DIPs description This 16-bit address comparator simplifies addressing of memory boards and/or other peripheral devices. The four P inputs are normally hardwired with a preprogrammed address. An internal decoder determines what input information applied to the A inputs must be low or high to cause a low state at the Y output. For example, a positive-logic bit combination of 0111 (decimal 7) at the P input determines that inputs A1 through A7 must be low and that inputs A8 through A16 must be high to cause the output to go low. Equality of the address applied at the A inputs to the preprogrammed address is indicated by the output being low. This device features an enable (G) input. When G is low, the device is enabled. When G is high, the device is disabled and the output is high, regardless of the A and P inputs. The SN74ALS677A is characterized for operation from 0 °C to 70°C. FUNCTION TABLE INPUTS OUTPUT G P3 P2 P1 P0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14 A15 A16 OUTPUT L L L L L H H H H H H H H H H H H H H H H L L L LL H L H HHHH HHH HHHHHHH L L L LHL L L HHHH HHH HHHHHHH L L L LH HL L L H H H H H H HHHHHHH L L L H L L L L L L H H H H H H H H H H H H L L L HL H L L L L L H H H H HHHHHHH L L L HH L L L LLLL H H H HHHHHHH L L L HH H L L LLLL L H H HHHHHHH L L H L L L L L L L L L L L H H H H H H H H L L H LL H L L LLLL LLL HHHHHHH L L H LHL L L LLLL LLL L HHHHHH L L H LH HL L LLLL LLL L L H H H H H L L H H L L L L L L L L L L L L L L H H H H L L H HL H L L LLLL LLL LLLL H H H L L H HH L L L LLLL LLL LLLLL H H L L H HH H L L LLLL LLL LLLLLL H L L All other combinations H H Any combination H DW OR NT PACKAGE (TOP VIEW) 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 GND VCC G Y P3 P2 P1 P0 A16 A15 A14 A13 A12 PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
Аналогичный номер детали - SN74ALS677A |
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Аналогичное описание - SN74ALS677A |
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