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SN74ALS746DW Datasheet(PDF) 1 Page - Texas Instruments |
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SN74ALS746DW Datasheet(HTML) 1 Page - Texas Instruments |
1 / 10 page SN74ALS746 OCTAL BUFFER AND LINE DRIVER WITH INPUT PULLUP RESISTORS SDAS052A − AUGUST 1984 − REVISED JANUARY 1995 Copyright 1995, Texas Instruments Incorporated 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443 • 3-State Outputs Drive Bus Lines or Buffer Memory Address Registers • Input Pullup Resistors Added for Data-Bus Termination • Data Flow-Through Pinout (All Inputs on Opposite Side From Outputs) • Package Options Include Plastic Small-Outline (DW) Packages and Standard Plastic (N) 300-mil DIPs description This octal buffer and line driver is designed to have the performance of the ′ALS240A and, at the same time, offers a pinout with inputs and outputs on opposite sides of the package. This arrangement facilitates printed-circuit-board layout. In addition, 20-k Ω resistors have been added between all inputs and VCC. This eliminates adding external resistors in applications where the data bus must be at a high level when all other connecting devices are at a high-impedance state. The 3-state control gate is a 2-input NOR such that if either output-enable (OE1 or OE2) input is high, all eight outputs are in the high-impedance state. The SN74ALS746 provides inverted data at the outputs. The SN74ALS746 is characterized for operation from 0 °C to 70°C. logic symbol† logic diagram (positive logic) Y1 18 Y2 17 Y3 16 Y4 15 2 A1 3 A2 4 A3 5 A4 1 2 18 Y1 1 OE1 6 A5 7 A6 8 A7 9 A8 Y5 14 Y6 13 Y7 12 Y8 11 19 OE2 & 19 OE1 OE2 VCC A1 20 To Seven Other Channels EN All input pullup resistors are 20 k Ω. † This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 OE1 A1 A2 A3 A4 A5 A6 A7 A8 GND VCC OE2 Y1 Y2 Y3 Y4 Y5 Y6 Y7 Y8 DW OR N PACKAGE (TOP VIEW) 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. |
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