CD74HCT574QPWRQ1屬于集成電路（IC）的觸發(fā)器。由美國德州儀器公司制造生產(chǎn)的CD74HCT574QPWRQ1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。

Qualified for Automotive Applications

Buffered Inputs

Common 3-State Output-Enable Control

3-State Outputs

Bus-Line Driving Capability

Typical Propagation Delay (Clock to Q):

15 ns at VCC = 5 V, CL = 15 pF, TA = 25
C

Fanout (Over Temperature Range)

Standard Outputs . . . 10 LSTTL Loads

Bus Driver Outputs . . . 15 LSTTL Loads

Balanced Propagation Delay and Transition

Times

Significant Power Reduction Compared to

LSTTL Logic ICs

VCC Voltage = 4.5 V to 5.5 V

Direct LSTTL Input Logic Compatibility,

VIL = 0.8 V (Max), VIH = 2 V (Min)

CMOS Input Compatibility, Il
1
A at VOL,

VOH

description/ordering information

The CD74HCT574 is an octal D-type flip-flop with

3-state outputs and the capability to drive 15 LSTTL

loads. The eight edge-triggered flip-flops enter data

into their registers on the low-to-high transition of the

clock (CP). The output enable (OE) controls the

3-state outputs and is independent of the register

operation. When OE is high, the outputs are in the

high-impedance state.