74AC11257

74AC11257 QUADRUPLE 2-LINE TO 1-LINE DATA SELECTOR/MULTIPLEXER WITH 3-STATE OUTPUTS SCAS049C − MARCH 1989 − REVISED MAY 2004 D 3-State Outputs Interface Directly With System Bus D Flow-Through Architecture Optimizes PCB Layout D Center-Pin VCC 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 DB, DW, N, OR PW PACKAGE (TOP VIEW) A/B 1Y 2Y GND GND GND GND 3Y 4Y OE 1 2 3 4 5 6 7 8 9 10 20 1A 19 1B 18 2A 17 2B 16 VCC 15 VCC 14 3A 13 3B 12 4A 11 4B 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 −40°C to 85°C SOIC − DW SSOP − DB Tube Tape and reel Tape and reel 74AC11257DW 74AC11257DWR 74AC11257DBR AC11257 AE257 TSSOP − PW Tube Tape and reel 74AC11257PW 74AC11257PWR AE257 † Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc...