SN74CB3T3306DCUR Datasheet

Dual Fet Bus Switch 2.5-v/3.3-v Low-Voltage Bus Switch With 5-v Tolerant Level Shifter


The SN74CB3T3306DCUR is a high-speed TTL-compatible FET bus switch with low ON-state resistance (r on ), allowing for minimal propagation delay. The device fully supports mixed-mode signal operation on all data I/O ports by providing voltage translation that tracks V CC .The SN74CB3T3306DCUR supports systems using 5-V TTL, 3.3-V LVTTL, and 2.5-V CMOS switching standards, as well as user-defined switching levels (see Figure 1). The SN74CB3T3306 is organized as two 1-bit bus switches with separate ouput-enable (1OE, 2OE) inputs. It can be used as two 1-bit bus switches or as one 2-bit bus switch. When OE is low, 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 high, the associated 1-bit bus switch is OFF, and a high-impedance state exists between the A and B ports. SN74CB3T3306DCUR Features • Output Voltage Translation Tracks VCC• Supports Mixed-Mode Signal Operation on All Data I/O Ports – 5-V Input Down to 3.3-V Output Level Shift With 3.3-V VCC – 5-V/3.3-V Input Down to 2.5-V Output Level Shift With 2.5-V VCC• 5-V Tolerant I/Os With Device Powered Up or Powered Down• Bidirectional Data Flow With Near-Zero Propagation Delay• Low ON-State Resistance (ron) Characteristics (ron= 5 Ω Typ)• Low Input/Output Capacitance Minimizes Loading (Cio(OFF)= 4.5 pF Typ)• Data and Control Inputs Provide Undershoot Clamp Diodes• Low Power Consumption (ICC= 20 μA Max)• VCC Operating Range From 2.3 V to 3.6 V• Data I/Os Support 0- to 5-V Signaling Levels (0.8 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V, 3.3 V, 5 V)• Control Inputs Can Be Driven by TTL or 5-V/3.3-V CMOS Outputs• Ioff Supports Partial-Power-Down Mode Operation• Latch-Up Performance Exceeds 250 mA Per JESD 17• ESD Performance Tested Per JESD 22 – 2000-V Human-Body Model (A114-B, Class II) – 1000-V Charged-Device Model (C101)• Supports Digital Applications: Level Translation, USB Interface, Bus Isolation• Ideal for Low-Power Portable Equipment


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Manufacturer information


ON Semiconductor - ON Semiconductor (Nasdaq: ON) is driving energy efficient innovations, empowering customers to reduce global energy use. The company offers a comprehensive portfolio of energy efficient power and signal management, logic, discrete and custom solutions to help design engineers solve their unique design challenges in automotive, communications, computing, consumer, industrial, LED lighting, medical, military/aerospace and power supply applications. ON Semiconductor operates a responsive, reliable, world-class supply chain and quality program, and a network of manufacturing facilities, sales offices and design centers in key markets throughout North America, Europe, and the Asia Pacific regions.

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