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SN74CB3Q3245PWRG4 Datenblatt(PDF) 2 Page - Texas Instruments |
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SN74CB3Q3245PWRG4 Datenblatt(HTML) 2 Page - Texas Instruments |
2 / 21 page www.ti.com DESCRIPTION/ORDERING INFORMATION (CONTINUED) GQN PACKAGE (TOP VIEW) 1 2 3 4 A B C D E SN74CB3Q3245 8-BIT FET BUS SWITCH 2.5-V/3.3-V LOW-VOLTAGE HIGH-BANDWIDTH BUS SWITCH SCDS124B – JULY 2003 – REVISED MARCH 2005 The SN74CB3Q3245 is organized as an 8-bit bus switch with a single output-enable (OE) input. When OE is low, the bus switch is ON and the A port is connected to the B port, allowing bidirectional data flow between ports. When OE is high, the bus switch is OFF and a high-impedance state exists between the A and B ports. This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry prevents damaging current 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; the minimum value of the resistor is determined by the current-sinking capability of the driver. ORDERING INFORMATION TA PACKAGE(1) ORDERABLE PART NUMBER TOP-SIDE MARKING QFN – RGY Tape and reel SN74CB3Q3245RGYR BU245 SSOP (QSOP) – DBQ Tape and reel SN74CB3Q3245DBQR CB3Q3245 Tube SN74CB3Q3245PW –40 °C to 85°C TSSOP – PW BU245 Tape and reel SN74CB3Q3245PWR TVSOP – DGV Tape and reel SN74CB3Q3245DGVR BU245 VFBGA – GQN Tape and reel SN74CB3Q3245GQNR BU245 (1) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package. TERMINAL ASSIGNMENTS(1) 1 2 3 4 A A1 NC VCC OE B A3 B2 A2 B1 C A5 A4 B4 B3 D A7 B6 A6 B5 E GND A8 B8 B7 (1) NC - No internal connection FUNCTION TABLE INPUT INPUT/OUTPUT FUNCTION OE A L B A port = B port H Z Disconnect 2 |
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