SN74CB3Q32245ZKER by Texas Instruments | Bus Switches | Avnet ASIA
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SN74CB3Q32245ZKER

Texas Instruments

Bus Switch 4-Element CMOS 32-IN 96-Pin BGA MICROSTAR T/R

Manufacturer Part #: SN74CB3Q32245ZKER

Alternate Part #: SN74CB3Q32245ZKER


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The SN74CB3Q32245 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 SN74CB3Q32245 provides an optimized interface solution ideally suited for broadband communications, networking, and data-intensive computing systems.

The SN74CB3Q32245 is organized as four 8-bit bus switches with separate output-enable (1OE, 2OE, 3OE, 4OE) inputs. It can be used as four 8-bit bus switches, two 16-bit bus switches, or as one 32-bit bus switch. When OE is low, the associated 8-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 8-bit 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; the minimum value of the resistor is determined by the current-sinking capability of the driver.

Key Features

  • Member of the Texas Instruments Widebus+™ Family
  • High-Bandwidth Data Path (Up to 500 MHz)
  • 5-V-Tolerant I/Os with Device Powered Up or Powered Down
  • Low and Flat ON-State Resistance (ron) Characteristics Over Operating Range (ron = 5 Ω Typical)
  • Rail-to-Rail Switching on Data I/O Ports
    • 0- to 5-V Switching With 3.3-V VCC
    • 0- to 3.3-V Switching With 2.5-V VCC
  • Bidirectional Data Flow, With Near-Zero Propagation Delay
  • Low Input/Output Capacitance Minimizes Loading and Signal Distortion (Cio(OFF) = 4 pF Typical)
  • Fast Switching Frequency (fOE\ = 20 MHz Max)
  • Data and Control Inputs Provide
  • Undershoot Clamp Diodes
  • Low Power Consumption (ICC = 2 mA Typical)
  • 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 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, Differential Signal Interface, Memory Interleaving, Bus Isolation, Low-Distortion Signal Gating
  • Technical Attributes

    Description
    Value
    Find similar Parts
    Pin Count
    96
    Maximum Low Level Output Current
    64 mA
    MSL Level
    3
    Fabrication Technology
    CMOS
    Maximum Operating Supply Voltage
    3.6 V
    Supplier Package
    BGA MICROSTAR
    Typical Quiescent Current
    2000 uA
    Max Processing Temp
    260
    Logic Function
    Bus Switch
    Lead Finish
    Tin/Silver/Copper
    Maximum High Level Output Current
    -64 mA
    Configuration
    8 x 1:1
    Maximum Propagation Delay Time @ Maximum CL
    0.3@3.3V ns
    Number of Elements per Chip
    4
    Maximum Quiescent Current
    4000 uA
    Screening Level
    Commercial
    Maximum On Resistance
    6 Ohm
    Number of Inputs per Chip
    32
    Minimum Operating Supply Voltage
    2.3 V
    Mounting
    Surface Mount
    Propagation Delay Test Condition
    50 pF
    Operating Temperature
    -40 to 85 °C
    Product Dimensions
    13.5 x 5.5 x 0.85 mm
    Typical Operating Supply Voltage
    2.5|3.3 V
    Number of Outputs per Chip
    32

    ECCN / UNSPSC

    Description
    Value
    ECCN:
    EAR99
    SCHEDULE B:
    8504.5000-00
    HTSN:
    8504.5000-00
    UNSPSC:
    32101600
    UNSPSC VERSION:
    V15.1101

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