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CBT6845C Datasheet

Part Name Description Manufacturer
CBT6845C 8-BIT FET BUS SWITCH WITH PRECHARGED OUTPUTS 5-V BUS SWITCH WITH -2-V UNDERSHOOT PROTECTION TI
Texas Instruments TI
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description/ordering information
The SN74CBT6845C 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 SN74CBT6845C provides protection for undershoot up to −2 V by sensing an undershoot event and ensuring that the switch remains in the proper OFF state. The device also precharges the B port to a user-selectable bias voltage (BIASV) to minimize live-insertion noise.

● Undershoot Protection for Off-Isolation on
   A and B Ports Up To −2 V
● B-Port Outputs Are Precharged by Bias
   Voltage (BIASV) to Minimize Signal
   Distortion During Live Insertion and
   Hot-Plugging
● Supports PCI Hot Plug
● Bidirectional Data Flow, With Near-Zero
   Propagation Delay
● Low ON-State Resistance (ron)
   Characteristics (ron = 3 Ω Typical)
● Low Input/Output Capacitance Minimizes
   Loading and Signal Distortion
   (Cio(OFF) = 5.5 pF Typical)
● Data and Control Inputs Provide
   Undershoot Clamp Diodes
● Low Power Consumption
   (ICC = 3 µA Max)
● VCC Operating Range From 4 V to 5.5 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 100 mA Per JESD 78, Class II
● ESD Performance Tested Per JESD 22
   − 2000-V Human-Body Model
      (A114-B, Class II)
   − 1000-V Charged-Device Model (C101)
● Supports Both Digital and Analog
   Applications: PCI Interface, Memory
   Interleaving, Bus Isolation, Low-Distortion
   Signal Gating

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