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SN54BCT574 - 产品图解:
SN54BCT574-具有三态输出的八路边沿 D 类触发器
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TI产品 - SN54BCT574介绍
SN54BCT574 - 具有三态输出的八路边沿 D 类触发器

SN54BCT574是TI公司的一款D类触发器产品,SN54BCT574是具有三态输出的八路边沿 D 类触发器,本页介绍了SN54BCT574的产品说明、应用、特性等,并给出了与SN54BCT574相关的TI元器件型号供参考。

SN54BCT574 - 具有三态输出的八路边沿 D 类触发器 - D类触发器 - 触发器/锁存器/寄存器 - TI公司(Texas Instruments,德州仪器)

产品描述

These 8-bit flip-flops feature 3-state outputs designed specifically for driving highly capacitive or relatively low-impedance loads. They are particularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers.

The eight flip-flops of the ’BCT574 devices are edge-triggered D-type flip-flops. On the positive transition of the clock (CLK) input, the Q outputs are set to the logic levels that were set up at the data (D) inputs.

A buffered output-enable (OE)\ input can be used to place the eight outputs in either a normal logic state (high or low logic levels) or the high-impedance state. In the high-impedance state, the outputs neither load nor drive the bus lines significantly. The high-impedance state and increased drive provide the capability to drive bus lines without interface or pullup components.

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.

(OE)\ does not affect internal operations of the flip-flops. Old data can be retained or new data can be entered while the outputs are in the high-impedance state.

产品特性

  • Operating Voltage Range of 4.5 V to 5.5 V
  • State-of-the-Art BiCMOS Design Significantly Reduces ICCZ
  • Full Parallel Access for Loading
  • ESD Protection Exceeds JESD 22
    • 2000-V Human-Body Model (A114-A)
    • 200-V Machine Model (A115-A)
    • 1000-V Charged-Device Model (C101)

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