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CD74FCT240 Folha de dados(PDF) 1 Page - Texas Instruments |
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CD74FCT240 Folha de dados(HTML) 1 Page - Texas Instruments |
1 / 12 page CD74FCT240 BiCMOS OCTAL BUFFER/LINE DRIVER WITH 3-STATE OUTPUTS SCBS729 − JULY 2000 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 D BiCMOS Technology With Low Quiescent Power D Buffered Inputs D Inverted Outputs D Input/Output Isolation From V CC 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 CD74FCT240 is an octal buffer/line driver 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 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 CD74FCT240 is organized as two 4-bit buffers/line drivers with separate active-low output-enable (OE) inputs. When OE is low, the device passes data from the A inputs to the Y outputs. When OE is high, the outputs are in the high-impedance state. 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 CD74FCT240 is characterized for operation from 0 °C to 70°C. FUNCTION TABLE (each buffer/driver) INPUTS OUTPUT OE A OUTPUT Y L H L L LH H X Z 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. 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 1OE 1A1 2Y4 1A2 2Y3 1A3 2Y2 1A4 2Y1 GND VCC 2OE 1Y1 2A4 1Y2 2A3 1Y3 2A2 1Y4 2A1 E, M, OR SM PACKAGE (TOP VIEW) |
Nº de peça semelhante - CD74FCT240_16 |
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Descrição semelhante - CD74FCT240_16 |
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