SN54ABT574 - 具有三态输出的八路边沿 D 类触发器

SN54ABT574是TI德州仪器公司的一款D类触发器产品，SN54ABT574是具有三态输出的八路边沿 D 类触发器，本站介绍了SN54ABT574的封装应用图解、特点和优点、功能等，并给出了与SN54ABT574相关的TI元器件型号供参考。

SN54ABT574 - 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 - 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 SN54ABT574 and SN74ABT574A 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.

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.

This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down.

产品特性

Typical VOLP (Output Ground Bounce) <1 V at VCC = 5 V, TA = 25°C
High-Drive Outputs (–32-mA IOH, 64-mA IOL)
Ioff Supports Partial-Power-Down Mode Operation
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)

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