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SN74CBT3345CDBR 데이터시트(PDF) 2 Page - Texas Instruments |
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SN74CBT3345CDBR 데이터시트(HTML) 2 Page - Texas Instruments |
2 / 17 page SN74CBT3345C 8BIT FET BUS SWITCH 5V BUS SWITCH WITH 2V UNDERSHOOT PROTECTION SCDS129A − SEPTEMBER 2003 − REVISED OCTOBER 2003 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 description/ordering information (continued) This device is fully specified for partial-power-down applications using Ioff. The Ioff feature ensures that damaging current will not backflow through the device when it is powered down. The device has isolation during power off. To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup resistor, and OE should be tied to GND through a pulldown resistor; the minimum value of the resistor is determined by the current-sinking/current-sourcing capability of the driver. ORDERING INFORMATION TA PACKAGE† ORDERABLE PART NUMBER TOP-SIDE MARKING QFN − RGY Tape and reel SN74CBT3345CRGYR CU345C SOIC − DW Tube SN74CBT3345CDW CBT3345C SOIC − DW Tape and reel SN74CBT3345CDWR CBT3345C SSOP − DB Tube SN74CBT3345CDB CU345C −40 °C to 85°C SSOP − DB Tape and reel SN74CBT3345CDBR CU345C −40 C to 85 C SSOP (QSOP) − DBQ Tape and reel SN74CBT3345CDBQR CBT3345C TSSOP − PW Tube SN74CBT3345CPW CU345C TSSOP − PW Tape and reel SN74CBT3345CPWR CU345C TVSOP − DGV Tape and reel SN74CBT3345CDGVR CU345C † Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package. FUNCTION TABLE INPUTS INPUT/OUTPUT FUNCTION OE OE INPUT/OUTPUT A FUNCTION H X B A port = B port X L B A port = B port L H Z Disconnect logic diagram (positive logic) A1 A8 OE B1 B8 OE 2 9 1 19 18 11 SW SW |
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