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SN54LVTH374 - 产品图解:
SN54LVTH374-具有三态输出的八路边沿 D 类触发器
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TI产品 - SN54LVTH374介绍
SN54LVTH374 - 具有三态输出的八路边沿 D 类触发器

SN54LVTH374是TI公司的一款D类触发器产品,SN54LVTH374是具有三态输出的八路边沿 D 类触发器,本页介绍了SN54LVTH374的产品说明、应用、特性等,并给出了与SN54LVTH374相关的TI元器件型号供参考。

SN54LVTH374 - 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 octal flip-flops are designed specifically for low-voltage (3.3-V) VCC operation, but with the capability to provide a TTL interface to a 5-V system environment.

The eight flip-flops of the ’LVTH374 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 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 need for interface or pullup components.

OE\ does not affect the 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.

When VCC is between 0 and 1.5 V, the devices are in the high-impedance state during power up or power down. However, to ensure the high-impedance state above 1.5 V, 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.

Active bus-hold circuitry holds unused or undriven inputs at a valid logic state. Use of pullup or pulldown resistors with the bus-hold circuitry is not recommended.

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.

产品特性

  • Support Mixed-Mode Signal Operation (5-V Input and Output Voltages With 3.3-V VCC)
  • Typical VOLP (Output Ground Bounce) <0.8 V at VCC = 3.3 V, TA = 25°C
  • Support Unregulated Battery Operation Down to 2.7 V
  • Ioff and Power-Up 3-State Support Hot Insertion
  • Bus Hold on Data Inputs Eliminates the Need for External Pullup/Pulldown Resistors
  • Latch-Up Performance Exceeds 500 mA Per JESD 17
  • ESD Protection Exceeds JESD 22
    • 2000-V Human-Body Model (A114-A)
    • 200-V Machine Model (A115-A)

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