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SN74CB3Q3245PWR Folha de dados(PDF) 2 Page - Texas Instruments |
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SN74CB3Q3245PWR Folha de dados(HTML) 2 Page - Texas Instruments |
2 / 14 page SN74CB3Q3245 8BIT FET BUS SWITCH 2.5V/3.3V LOW VOLTAGE HIGHBANDWIDTH BUS SWITCH SCDS124B − JULY 2003 − REVISED NOVEMBER 2003 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 description/ordering information The SN74CB3Q3245 is a high-bandwidth FET bus switch utilizing a charge pump to elevate the gate voltage of the pass transistor, providing a low and flat ON-state resistance (ron). The low and flat ON-state resistance allows for minimal propagation delay and supports rail-to-rail switching on the data input/output (I/O) ports. The device also features low data I/O capacitance to minimize capacitive loading and signal distortion on the data bus. Specifically designed to support high-bandwidth applications, the SN74CB3Q3245 provides an optimized interface solution ideally suited for broadband communications, networking, and data-intensive computing systems. 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† ORDERABLE PART NUMBER TOP-SIDE MARKING QFN − RGY Tape and reel SN74CB3Q3245RGYR BU245 SSOP (QSOP) − DBQ Tape and reel SN74CB3Q3245DBQR CB3Q3245 −40 °C to 85°C TSSOP − PW Tube SN74CB3Q3245PW BU245 −40 °C to 85°C TSSOP − PW Tape and reel SN74CB3Q3245PWR BU245 TVSOP − DGV Tape and reel SN74CB3Q3245DGVR BU245 VFBGA − GQN Tape and reel SN74CB3Q3245GQNR BU245 † Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package. terminal assignments 1234 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 NC − No internal connection FUNCTION TABLE INPUT INPUT/OUTPUT FUNCTION INPUT OE INPUT/OUTPUT A FUNCTION L B A port = B port H Z Disconnect GQN PACKAGE (TOP VIEW) 1 234 A B C D E |
Nº de peça semelhante - SN74CB3Q3245PWR |
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Descrição semelhante - SN74CB3Q3245PWR |
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