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SN74AHCT540NSR 데이터시트(PDF) 1 Page - Texas Instruments |
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SN74AHCT540NSR 데이터시트(HTML) 1 Page - Texas Instruments |
1 / 22 page 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 SN74AHCT540 . . . DB, DGV, DW, N, NS, OR PW PACKAGE (TOP VIEW) 3 2 1 20 19 9 10 11 12 13 4 5 6 7 8 18 17 16 15 14 Y1 Y2 Y3 Y4 Y5 A3 A4 A5 A6 A7 SN54AHCT540 . . . FK PACKAGE (TOP VIEW) SN54AHCT540 . . . J OR W PACKAGE SN54AHCT540 SN74AHCT540 www.ti.com SCLS268M – OCTOBER 1995 – REVISED JUNE 2013 OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS Check for Samples: SN54AHCT540, SN74AHCT540 1 FEATURES • Inputs Are TTL-Voltage Compatible • Latch-Up Performance Exceeds 250 mA Per JESD 17 • ESD Protection Exceeds JESD 22 – 2000-V Human-Body Model (A114-A) – 200-V Machine Model (A115-A) – 1000-V Charged-Device Model (C101) DESCRIPTION The ’AHCT540 octal buffers/drivers are ideal for driving bus lines or buffer memory address registers. These devices feature inputs and outputs on opposite sides of the package to facilitate printed circuit board layout. The 3-state control gate is a two-input AND gate with active-low inputs so that if either output-enable (OE1 or OE2) input is high, all corresponding outputs are in the high-impedance state. The outputs provide inverted data when they are not 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. FUNCTION TABLE (EACH BUFFER/DRIVER) INPUTS OUTPUT Y OE1 OE2 A L L L H L L H L H X X Z X H X Z 1 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. PRODUCTION DATA information is current as of publication date. Copyright © 1995–2013, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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