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74AC11257PW Datasheet(PDF) 1 Page - Texas Instruments |
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74AC11257PW Datasheet(HTML) 1 Page - Texas Instruments |
1 / 16 page 74AC11257 QUADRUPLE 2-LINE TO 1-LINE DATA SELECTOR/MULTIPLEXER WITH 3-STATE OUTPUTS SCAS049C − MARCH 1989 − REVISED MAY 2004 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 D 3-State Outputs Interface Directly With System Bus D Flow-Through Architecture Optimizes PCB Layout D Center-Pin V CC and GND Configurations Minimize High-Speed Switching Noise D 500-mA Typical Latch-Up Immunity at 125 °C D Provides Bus Interface From Multiple Sources in High-Performance Systems description/ordering information This device is designed to multiplex signals from 4-bit data sources to four output data lines in bus-organized systems. The 3-state outputs do not load the data lines when the output-enable (OE) input is at a high logic level. 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. ORDERING INFORMATION TA PACKAGE† ORDERABLE PART NUMBER TOP-SIDE MARKING PDIP − N Tube 74AC11257N 74AC11257N SOIC DW Tube 74AC11257DW AC11257 40 °Cto85°C SOIC − DW Tape and reel 74AC11257DWR AC11257 −40 °C to 85°C SSOP − DB Tape and reel 74AC11257DBR AE257 TSSOP PW Tube 74AC11257PW AE257 TSSOP − PW Tape and reel 74AC11257PWR AE257 † Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package. FUNCTION TABLE INPUTS OUTPUT OE SELECT DATA OUTPUT Y OE SELECT A/B A B Y H X X X Z L L L X L L L H X H L H X L L L H X H H Copyright © 2004, 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 A/B 1Y 2Y GND GND GND GND 3Y 4Y OE 1A 1B 2A 2B VCC VCC 3A 3B 4A 4B DB, DW, N, OR PW PACKAGE (TOP VIEW) |
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