CY74FCT574ATQCT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CY74FCT574ATQCT觸發(fā)器觸發(fā)器是能夠存儲單個邏輯狀態(tài)或信息“位”的基本數(shù)字存儲器件。這些器件至少有兩個輸入；一個或多個用于傳遞要存儲的數(shù)據(jù)，另一個用于指示存儲該數(shù)據(jù)的時間點。不同的觸發(fā)器類型，例如 D（延遲）、SR（置位復位）和 JK，對提供給其輸入的信號有不同的響應，可用于實現(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)僅在接收到有效時鐘信號時才會改變。

Function, Pinout, and Drive Compatible

With FCT and F Logic

Reduced VOH (Typically = 3.3 V) Versions

of Equivalent FCT Functions

Edge-Rate Control Circuitry for

Significantly Improved Noise

Characteristics

Ioff Supports Partial-Power-Down Mode

Operation

Matched Rise and Fall Times

Fully Compatible With TTL Input and

Output Logic Levels

ESD Protection Exceeds JESD 22

– 2000-V Human-Body Model (A114-A)

– 200-V Machine Model (A115-A)

– 1000-V Charged-Device Model (C101)

Edge-Triggered D-Type Inputs

250-MHz Typical Switching Rate

CY54FCT574T

– 32-mA Output Sink Current

– 12-mA Output Source Current

CY74FCT574T

– 64-mA Output Sink Current

– 32-mA Output Source Current

3-State Outputs

description

The ’FCT574T devices are high-speed, low-power, octal D-type flip-flops, featuring separate D-type inputs for

each flip-flop. These devices have 3-state outputs for bus-oriented applications. A buffered clock (CP) and

output-enable (OE) inputs are common to all flip-flops. The ’FCT574T are identical to ’FCT374T, except for a

flow-through pinout to simplify board design. The eight flip-flops in the ’FCT574T store the state of their

individual D inputs that meet the setup-time and hold-time requirements on the low-to-high CP transition. When

OE is low, the contents of the eight flip-flops are available at the outputs. When OE is high, the outputs are in

the high-impedance state. The state of OE does not affect the state of the flip-flops.

These devices are 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.