SN74AC574 - 具有三态输出的八路 D 类边沿触发器

SN74AC574是TI德州仪器公司的一款D类触发器产品，SN74AC574是具有三态输出的八路 D 类边沿触发器，本站介绍了SN74AC574的封装应用图解、特点和优点、功能等，并给出了与SN74AC574相关的TI元器件型号供参考。

SN74AC574 - 具有三态输出的八路 D 类边沿触发器 - D类触发器 - 触发器/锁存器/寄存器 - 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. The devices are particularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers.

The eight flip-flops of the ’AC574 devices are D-type edge-triggered 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 the increased drive provide the capability to drive bus lines in a bus-organized system without need for interface or pullup components.

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

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.

产品特性

2-V to 6-V VCC Operation
Inputs Accept Voltages to 6 V
Max tpd of 8.5 ns at 5 V
3-State Outputs Drive Bus Lines Directly

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