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SN74CB3Q3305DCUR 数据表(PDF) 1 Page - Texas Instruments |
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SN74CB3Q3305DCUR 数据表(HTML) 1 Page - Texas Instruments |
1 / 10 page www.ti.com FEATURES PW PACKAGE (TOP VIEW) 1 2 3 4 8 7 6 5 1OE 1A 1B GND VCC 2OE 2B 2A DESCRIPTION/ORDERING INFORMATION SN74CB3Q3305 DUAL FET BUS SWITCH 2.5-V/3.3-V LOW-VOLTAGE HIGH-BANDWIDTH BUS SWITCH SCDS141A – OCTOBER 2003 – REVISED APRIL 2005 • Data and Control Inputs Provide Undershoot Clamp Diodes • High-Bandwidth Data Path (up to 500 MHz (1)) • Low Power Consumption (I CC = 0.25 mA Typ) • 5-V Tolerant I/Os With Device Powered Up or Powered Down • V CC Operating Range From 2.3 V to 3.6 V • Low and Flat ON-State Resistance (r on) • Data I/Os Support 0- to 5-V Signaling Levels Characteristics Over Operating Range (0.8 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V, 3.3 V, 5 V) (r on = 3 Ω Typ) • Control Inputs Can Be Driven by TTL or • Rail-to-Rail Switching on Data I/O Ports 5-V/3.3-V CMOS Outputs – 0- to 5-V Switching With 3.3-V V CC • I off Supports Partial-Power-Down Mode Operation – 0- to 3.3-V Switching With 2.5-V V CC • Latch-Up Performance Exceeds 100 mA Per • Bidirectional Data Flow With Near-Zero JESD 78, Class II Propagation Delay • ESD Performance Tested Per JESD 22 • Low Input/Output Capacitance Minimizes Loading and Signal Distortion – 2000-V Human-Body Model (C io(OFF) = 3.5 pF Typ) (A114-B, Class II) • Fast Switching Frequency (f OE = 20 MHz Max) – 1000-V Charged-Device Model (C101) • Supports Both Digital and Analog (1) For additional information regarding the performance Applications: USB Interface, Differential characteristics of the CB3Q family, refer to the TI application Signal Interface, Bus Isolation, Low-Distortion report, CBT-C, CB3T, and CB3Q Signal-Switch Families, literature number SCDA008. Signal Gating The SN74CB3Q3305 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 SN74CB3Q3305 provides an optimized interface solution ideally suited for broadband communications, networking, and data-intensive computing systems. The SN74CB3Q3305 is organized as two 1-bit switches with separate output-enable (1OE, 2OE) inputs. It can be used as two 1-bit bus switches or as one 2-bit bus switch. When OE is high, the associated 1-bit bus switch is ON and the A port is connected to the B port, allowing bidirectional data flow between ports. When OE is low, the associated 1-bit bus switch is OFF and a high-impedance state exists between the A and B ports. ORDERING INFORMATION TA PACKAGE(1) ORDERABLE PART NUMBER TOP-SIDE MARKING Tube SN74CB3Q3305PW –40°C to 85°C TSSOP – PW BU305 Tape and reel SN74CB3Q3305PWR (1) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PRODUCTION DATA information is current as of publication date. Copyright © 2003–2005, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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