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SN74CB3Q3345RGYR Arkusz danych(PDF) 2 Page - Texas Instruments |
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SN74CB3Q3345RGYR Arkusz danych(HTML) 2 Page - Texas Instruments |
2 / 11 page SN74CB3Q3345 8BIT FET BUS SWITCH 2.5V/3.3V LOW VOLTAGE HIGHBANDWIDTH BUS SWITCH SCDS144A − OCTOBER 2003 − REVISED NOVEMBER 2003 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 description/ordering information The SN74CB3Q3345 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 SN74CB3Q3345 provides an optimized interface solution ideally suited for broadband communications, networking, and data-intensive computing systems. The SN74CB3Q3384A is organized as an 8-bit bus switch with two output-enable (OE, OE) inputs. When OE is high or 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 low and 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 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 SN74CB3Q3345RGYR BU345 SSOP (QSOP) − DBQ Tape and reel SN74CB3Q3345DBQR CB3Q3345 −40 °C to 85°C TSSOP − PW Tube SN74CB3Q3345PW BU345 −40 C to 85 C TSSOP − PW Tape and reel SN74CB3Q3345PWR BU345 TVSOP − DGV Tape and reel SN74CB3Q3345DGVR BU345 † 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 |
Podobny numer części - SN74CB3Q3345RGYR |
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Podobny opis - SN74CB3Q3345RGYR |
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