поискавой системы для электроныых деталей |
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CD74FCT245 датащи(PDF) 1 Page - Texas Instruments |
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CD74FCT245 датащи(HTML) 1 Page - Texas Instruments |
1 / 14 page CD74FCT245 BiCMOS OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS SCBS721 – JULY 2000 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 D BiCMOS Technology With Low Quiescent Power D Buffered Inputs D Noninverted Outputs D Input/Output Isolation From VCC D Controlled Output Edge Rates D 64-mA Output Sink Current D Output Voltage Swing Limited to 3.7 V D SCR Latch-Up-Resistant BiCMOS Process and Circuit Design D Package Options Include Plastic Small-Outline (M) and Shrink Small-Outline (SM) Packages and Standard Plastic (E) DIP description The CD74FCT245 is an octal bus transceiver with 3-state outputs using a small-geometry BiCMOS technology. The output stages are a combination of bipolar and CMOS transistors that limit the output high level to two diode drops below VCC. This resultant lowering of output swing (0 V to 3.7 V) reduces the power-bus ringing [a source of electromagnetic interference (EMI)] and minimizes VCC bounce and ground bounce and their effects during simultaneous output switching. The output configuration also enhances switching speed and is capable of sinking 64 mA. The CD74FCT245 allows data transmission from the A bus to the B bus or from the B bus to the A bus, depending upon the logic level at the direction-control (DIR) input. The output-enable (OE) input can be used to disable the device so that the buses are effectively isolated. To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver. The CD74FCT245 is characterized for operation from 0 °C to 70°C. FUNCTION TABLE INPUTS OPERATION OE DIR OPERATION L L B data to A bus L H A data to B bus H X Isolation Copyright © 2000, Texas Instruments Incorporated 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. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. E, M, OR SM PACKAGE (TOP VIEW) 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 DIR A1 A2 A3 A4 A5 A6 A7 A8 GND VCC OE B1 B2 B3 B4 B5 B6 B7 B8 |
Аналогичный номер детали - CD74FCT245_16 |
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Аналогичное описание - CD74FCT245_16 |
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