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SN74CB3Q3345RGYR 数据表(PDF) 2 Page - Texas Instruments |
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SN74CB3Q3345RGYR 数据表(HTML) 2 Page - Texas Instruments |
2 / 17 page www.ti.com DESCRIPTION/ORDERING INFORMATION A1 A8 OE B1 B8 OE 2 9 1 19 18 11 SW SW SN74CB3Q3345 8-BIT FET BUS SWITCH 2.5-V/3.3-V LOW-VOLTAGE HIGH-BANDWIDTH BUS SWITCH SCDS144B – OCTOBER 2003 – REVISED MARCH 2005 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(1) 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 Tube SN74CB3Q3345PW TSSOP – PW BU345 Tape and reel SN74CB3Q3345PWR TVSOP – DGV Tape and reel SN74CB3Q3345DGVR BU345 (1) 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 A OE OE H X B A port = B port X L B A port = B port L H Z Disconnect LOGIC DIAGRAM (POSITIVE LOGIC) 2 |
类似零件编号 - SN74CB3Q3345RGYR |
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类似说明 - SN74CB3Q3345RGYR |
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