SN74CB3Q3251DBQR by Texas Instruments | APACBus Switch | Avnet ASIA

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信息

SN74CB3Q3251DBQR

Texas Instruments

Multiplexer/Demultiplexer Bus Switch 1-Element CMOS 8-IN 16-Pin SSOP T/R

制造商料号#: SN74CB3Q3251DBQR

替代型号#: SN74CB3Q3251DBQR


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描述

文档

替代/替换

信息

The SN74CB3Q3251 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 SN74CB3Q3251 provides an optimized interface solution ideally suited for broadband communications, networking, and data-intensive computing systems.

The SN74CB3Q3251 is a 1-of-8 multiplexer/demultiplexer with a single output-enable (OE) input. The select (S0, S1, S2) inputs control the data path of the multiplexer/demultiplexer. When OE is low, the multiplexer/demultiplexer is enabled, and the A port is connected to the B port, allowing bidirectional data flow between ports. When OE is high, the multiplexer/demultiplexer is disabled, 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.

技术参数

  • High-Bandwidth Data Path (up to 500 MHz (1))
  • Equivalent to IDTQS3VH251 Device
  • 5-V Tolerant I/Os With Device Powered Up or Powered Down
  • Low and Flat ON-State Resistance (ron) Characteristics Over Operating Range (ron = 4 Ω Typ)
  • 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) = 3.5 pF Typ)
  • Fast Switching Frequency
    (fOE\ or fS = 20 MHz Max)
  • Data and Control Inputs Provide Undershoot Clamp Diodes
  • Low Power Consumption (ICC = 1 mA Typ)
  • 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
  • 技术特性

    描述
    寻找类似物料
    Propagation Delay Test Condition
    50 pF
    Operating Temperature
    -40 to 85 °C
    Maximum High Level Output Current
    -64 mA
    Typical Operating Supply Voltage
    2.5|3.3 V
    Mounting
    Surface Mount
    Maximum Propagation Delay Time @ Maximum CL
    0.18@3.3V ns
    Number of Outputs per Chip
    1
    MSL Level
    2
    Typical Quiescent Current
    1000 uA
    Minimum Operating Supply Voltage
    2.3 V
    Maximum On Resistance
    4.5 Ohm
    Maximum Quiescent Current
    4000 uA
    Configuration
    1 x 8:1
    Number of Inputs per Chip
    8
    Logic Function
    Multiplexer/Demultiplexer Bus Switch
    Maximum Low Level Output Current
    64 mA
    Pin Count
    16
    Number of Elements per Chip
    1
    Fabrication Technology
    CMOS
    Max Processing Temp
    260
    Supplier Package
    SSOP
    Product Dimensions
    5 x 4 x 1.5 mm
    Lead Finish
    Gold
    Maximum Operating Supply Voltage
    3.6 V

    ECCN / UNSPSC

    描述
    ECCN:
    EAR99
    计划交货期 B:
    8542.2191-00
    HTSN:
    8542.2191-00
    UNSPSC:
    32101600
    UNSPSC VERSION:
    V15.1101

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