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74ALS646D датащи(PDF) 5 Page - NXP Semiconductors |
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74ALS646D датащи(HTML) 5 Page - NXP Semiconductors |
5 / 13 page Philips Semiconductors Product specification 74ALS646/74ALS646-1 74ALS648/74ALS648-1 Transceiver/register 1991 Feb 08 5 LOGIC SYMBOL – 74ALS646/646-1 VCC = Pin 24 GND = Pin 12 A0 OE B0 1D C1 1D C1 DIR CPBA SBA CPAB SAB 1 OF 8 CHANNELS TO 7 OTHER CHANNELS 21 4 20 3 23 22 1 2 SC00124 LOGIC SYMBOL – 74ALS648/648-1 VCC = Pin 24 GND = Pin 12 A0 OE B0 1D C1 1D C1 DIR CPBA SBA CPAB SAB 1 OF 8 CHANNELS TO 7 OTHER CHANNELS 21 4 20 3 23 22 1 2 SC00125 FUNCTION TABLE INPUTS DATA I/O OPERATING MODE OE DIR CPAB CPBA SAB SBA An Bn 74ALS646/74ALS646-1 74ALS648/74ALS648-1 X X ↑ X X X Input Unspecified* Store A, B unspecified* Store A, B unspecified* X X X ↑ X X Unspecified* Input Store B, A unspecified* Store B, A unspecified* H X ↑ ↑ X X Input Input Store A and B data Store A and B data H X H or L H or L X X Input Input Isolation, hold storage Isolation, hold storage L L X X X L Output Input Real time B data to A bus Real time B data to A bus L L X H or L X H Output Input Stored 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 Real time A data to B bus L H H or L X H X Input Output Stored A data to B bus Stored A data to B bus NOTES: H = High voltage level L = Low voltage level X = Don’t care * = The data output function 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. ↑ = Low-to-High clock transition |
Аналогичный номер детали - 74ALS646D |
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Аналогичное описание - 74ALS646D |
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