MC74VHCT574ADT屬于集成電路（IC）的觸發(fā)器。由安森美半導(dǎo)體公司制造生產(chǎn)的MC74VHCT574ADT觸發(fā)器觸發(fā)器是能夠存儲(chǔ)單個(gè)邏輯狀態(tài)或信息“位”的基本數(shù)字存儲(chǔ)器件。這些器件至少有兩個(gè)輸入；一個(gè)或多個(gè)用于傳遞要存儲(chǔ)的數(shù)據(jù)，另一個(gè)用于指示存儲(chǔ)該數(shù)據(jù)的時(shí)間點(diǎn)。不同的觸發(fā)器類型，例如 D（延遲）、SR（置位復(fù)位）和 JK，對(duì)提供給其輸入的信號(hào)有不同的響應(yīng)，可用于實(shí)現(xiàn)不同的邏輯功能。這些器件與鎖存器的不同之處在于它們是邊緣敏感器件，其保持的邏輯狀態(tài)僅在接收到有效時(shí)鐘信號(hào)時(shí)才會(huì)改變。

Octal D?Type Flip?Flop with 3?State Output

The MC74VHCT574A is an advanced high speed CMOS octal flip?flop with 3?state output fabricated with silicon gate CMOS technology. It achieves high speed operation similar to equivalent Bipolar Schottky TTL while maintaining CMOS low power dissipation.

This 8?bit D?type flip?flop is controlled by a clock input and an output enable input. When the output enable input is high, the eight outputs are in a high impedance state.

The VHCT inputs are compatible with TTL levels. This device can be used as a level converter for interfacing 3.3 V to 5.0 V, because it has full 5.0 V CMOS level output swings.

The VHCT574A input and output (when disabled) structures provide protection when voltages between 0 V and 5.5 V are applied, regardless of the supply voltage. These input and output structures help prevent device destruction caused by supply voltage?input/output voltage mismatch, battery backup, hot insertion, etc.

Features

? High Speed: fmax = 140 MHz (Typ) at VCC = 5.0 V

? Low Power Dissipation: ICC = 4 μA (Max) at TA = 25°C

? TTL?Compatible Inputs: VIL = 0.8 V; VIH = 2.0 V

? Power Down Protection Provided on Inputs and Outputs

? Balanced Propagation Delays

? Designed for 4.5 V to 5.5 V Operating Range

? Low Noise: VOLP = 1.6 V (Max)

? Pin and Function Compatible with Other Standard Logic Families

? Latchup Performance Exceeds 300 mA

? ESD Performance:

Human Body Model > 2000 V;

Machine Model > 200 V

? Chip Complexity: 286 FETs or 71.5 Equivalent Gates

? Pb?Free Packages are Available*