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TI(德州仪器) SN74ABT162827A
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  • TI(德州仪器) SN74ABT162827A
  • TI(德州仪器) SN74ABT162827A
  • TI(德州仪器) SN74ABT162827A
  • TI(德州仪器) SN74ABT162827A
  • TI(德州仪器) SN74ABT162827A
  • TI(德州仪器) SN74ABT162827A
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SN74ABT162827A

SN74ABT162827A

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具有 TTL 兼容型 CMOS 输入和三态输出的 20 通道、4.5V 至 5.5V 缓冲器

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The ’ABT162827A devices are noninverting 20-bit buffers composed of two 10-bit buffers with separate output-enable signals. For either 10-bit buffer, the two output-enable (1OE1 and 1OE2, or 2OE1 and 2OE2) inputs must both be low for the corresponding Y outputs to be active. If either output-enable input is high, the outputs of that 10-bit buffer are in the high-impedance state.

The outputs, which are designed to source or sink up to 12 mA, include equivalent 25- series resistors to reduce overshoot and undershoot.

These devices are fully specified for hot-insertion applications using Ioff and power-up 3-state. The Ioff circuitry disables the outputs, preventing damaging current backflow through the devices when they are powered down. The power-up 3-state circuitry places the outputs in the high-impedance state during power up and power down, which prevents driver conflict.

To ensure the high-impedance state during power up or power down, OE shall be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

  • Members of the Texas Instruments Widebus™ Family
  • Output Ports Have Equivalent 25- Series Resistors, So No External Resistors Are Required
  • High-Impedance State During Power Up and Power Down
  • Typical VOLP (Output Ground Bounce)
        < 1 V at VCC= 5 V, TA = 25°C
  • Distributed VCC and GND Pin Minimizes High-Speed Switching Noise
  • Ioff and Power-Up 3-State Support Hot Insertion
  • Flow-Through Architecture Optimizes PCB Layout
  • Latch-Up Performance Exceeds 500 mA Per JEDEC Standard JESD-17
  • ESD Protection Exceeds JESD 22
    • 2000-V Human-Body Model (A114-A)
    • 200-V Machine Model (A115-A)

Widebus is a trademark of Texas Instruments.

Technology familyABT
Supply voltage (min) (V)4.5
Supply voltage (max) (V)5.5
Number of channels20
IOL (max) (mA)12
Supply current (max) (µA)32000
IOH (max) (mA)-12
Input typeTTL-Compatible CMOS
Output type3-State
FeaturesBalanced outputs, Damping resistors, Over-voltage tolerant inputs, Partial power down (Ioff), Power up 3-state, Ultra high speed (tpd <5ns)
RatingCatalog
Operating temperature range (°C)-40 to 85
SSOP (DL)56190.647 mm² 18.42 x 10.35
TSSOP (DGG)56113.4 mm² 14 x 8.1
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