SN74CBT3345C

8-BIT FET BUS SWITCH 5-V BUS SWITCH WITH —-2-V UNDERSHOOT PROTECTION

UndershootProtectionforOff-Isolationon AandBPortsUpTo−2V BidirectionalDataFlow,WithNear-Zero PropagationDelay LowON-StateResistance(ron) Characteristics(ron=3ΩTypical) LowInput/OutputCapacitanceMinimizes LoadingandSignalDistortion (Cio(OFF)=5.5pFTypical)

SN74CBT3345C

具有 –2V 下冲保护的 5V、1:1 (SPST)、8 通道总线开关; • Undershoot Protection for Off-Isolation on A and B Ports Up to –2 V\n• Bidirectional Data Flow, With Near-Zero Propagation Delay\n• Low ON-State Resistance (ron) Characteristics (ron = 3 Typical)\n• Low Input/Output Capacitance Minimizes Loading and Signal Distortion Cio(OFF) = 5.5 pF Typical)\n• Data and Control Inputs Provide Undershoot Clamp Diodes\n• Low Power Consumption ICC = 3 µA Max)\n• VCC Operating Range From 4 V to 5.5 V\n• 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)\n• Control Inputs Can Be Driven by TTL or 5-V/3.3-V CMOS Outputs\n• Ioff Supports Partial-Power-Down Mode Operation\n• Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II\n• ESD Performance Tested Per JESD 22 \n• 2000-V Human-Body Model (A114-B, Class II)\n• 1000-V Charged-Device Model (C101)\n \n• Supports Both Digital and Analog Applications: USB Interface, Memory Interleaving, Bus Isolation, Low-Distortion Signal Gating;

The SN74CBT3345C is a high-speed TTL-compatible FET bus switch with low ON-state resistance (ron), allowing for minimal propagation delay. Active Undershoot-Protection Circuitry on the A and B ports of the SN74CBT3345C provides protection for undershoot up to –2 V by sensing an undershoot event and ensuring that the switch remains in the proper OFF state.\n\n The SN74CBT3345C 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 the high-impedance state exists between the A and B ports.\n\n This device is fully specified for partial-power-down applications using Ioff. The Ioff feature ensures that damaging current will not backflow through the device when it is powered down.\n\n 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.

SN74CBT3345C

8-BIT FET BUS SWITCH 5-V BUS SWITCH WITH -2-V UNDERSHOOT PROTECTION

SN74CBT3345CDB

8-BIT FET BUS SWITCH 5-V BUS SWITCH WITH —-2-V UNDERSHOOT PROTECTION

UndershootProtectionforOff-Isolationon AandBPortsUpTo−2V BidirectionalDataFlow,WithNear-Zero PropagationDelay LowON-StateResistance(ron) Characteristics(ron=3ΩTypical) LowInput/OutputCapacitanceMinimizes LoadingandSignalDistortion (Cio(OFF)=5.5pFTypical)

SN74CBT3345CDBQR

8-BIT FET BUS SWITCH 5-V BUS SWITCH WITH —-2-V UNDERSHOOT PROTECTION

UndershootProtectionforOff-Isolationon AandBPortsUpTo−2V BidirectionalDataFlow,WithNear-Zero PropagationDelay LowON-StateResistance(ron) Characteristics(ron=3ΩTypical) LowInput/OutputCapacitanceMinimizes LoadingandSignalDistortion (Cio(OFF)=5.5pFTypical)

SN74CBT3345CDBQR.B

Package：SSOP；8-BIT FET BUS SWITCH 5-V BUS SWITCH WITH —-2-V UNDERSHOOT PROTECTION

UndershootProtectionforOff-Isolationon AandBPortsUpTo−2V BidirectionalDataFlow,WithNear-Zero PropagationDelay LowON-StateResistance(ron) Characteristics(ron=3ΩTypical) LowInput/OutputCapacitanceMinimizes LoadingandSignalDistortion (Cio(OFF)=5.5pFTypical)

SN74CBT3345CDBR

8-BIT FET BUS SWITCH 5-V BUS SWITCH WITH —-2-V UNDERSHOOT PROTECTION

UndershootProtectionforOff-Isolationon AandBPortsUpTo−2V BidirectionalDataFlow,WithNear-Zero PropagationDelay LowON-StateResistance(ron) Characteristics(ron=3ΩTypical) LowInput/OutputCapacitanceMinimizes LoadingandSignalDistortion (Cio(OFF)=5.5pFTypical)

SN74CBT3345CDGVR

8-BIT FET BUS SWITCH 5-V BUS SWITCH WITH —-2-V UNDERSHOOT PROTECTION

UndershootProtectionforOff-Isolationon AandBPortsUpTo−2V BidirectionalDataFlow,WithNear-Zero PropagationDelay LowON-StateResistance(ron) Characteristics(ron=3ΩTypical) LowInput/OutputCapacitanceMinimizes LoadingandSignalDistortion (Cio(OFF)=5.5pFTypical)

SN74CBT3345CDW

Package：SOIC；8-BIT FET BUS SWITCH 5-V BUS SWITCH WITH —-2-V UNDERSHOOT PROTECTION

UndershootProtectionforOff-Isolationon AandBPortsUpTo−2V BidirectionalDataFlow,WithNear-Zero PropagationDelay LowON-StateResistance(ron) Characteristics(ron=3ΩTypical) LowInput/OutputCapacitanceMinimizes LoadingandSignalDistortion (Cio(OFF)=5.5pFTypical)

SN74CBT3345CDW.B

Package：SOIC；8-BIT FET BUS SWITCH 5-V BUS SWITCH WITH —-2-V UNDERSHOOT PROTECTION

UndershootProtectionforOff-Isolationon AandBPortsUpTo−2V BidirectionalDataFlow,WithNear-Zero PropagationDelay LowON-StateResistance(ron) Characteristics(ron=3ΩTypical) LowInput/OutputCapacitanceMinimizes LoadingandSignalDistortion (Cio(OFF)=5.5pFTypical)