CD74FCT245E屬于集成電路（IC）的緩沖器驅(qū)動(dòng)器接收器收發(fā)器。由美國(guó)德州儀器公司制造生產(chǎn)的CD74FCT245E緩沖器，驅(qū)動(dòng)器，接收器，收發(fā)器邏輯緩沖器、驅(qū)動(dòng)器、接收器和收發(fā)器允許隔離對(duì)某個(gè)電路的邏輯信號(hào)的訪問，以用于另一電路。緩沖器將其輸入信號(hào)（不變或反相）傳遞到其輸出，并可能用于清除弱信號(hào)或驅(qū)動(dòng)負(fù)載。在布爾邏輯仿真器中，緩沖器主要用于增加傳播延遲。邏輯接收器和收發(fā)器允許在數(shù)據(jù)總線之間進(jìn)行隔離通信。

BiCMOS Technology With Low Quiescent

Power

Buffered Inputs

Noninverted Outputs

Input/Output Isolation From VCC

Controlled Output Edge Rates

64-mA Output Sink Current

Output Voltage Swing Limited to 3.7 V

SCR Latch-Up-Resistant BiCMOS Process

and Circuit Design

Package Options Include Plastic

Small-Outline (M) and Shrink Small-Outline

(SM) Packages and Standard Plastic (E) DIP

description

The CD74FCT245 is an octal bus transceiver with 3-state outputs using a small-geometry BiCMOS technology.

The output stages are a combination of bipolar and CMOS transistors that limit the output high level to two diode

drops below VCC. This resultant lowering of output swing (0 V to 3.7 V) reduces the power-bus ringing [a source

of electromagnetic interference (EMI)] and minimizes VCC bounce and ground bounce and their effects during

simultaneous output switching. The output configuration also enhances switching speed and is capable of

sinking 64 mA.

The CD74FCT245 allows data transmission from the A bus to the B bus or from the B bus to the A bus,

depending upon the logic level at the direction-control (DIR) input. The output-enable (OE) input can be used

to disable the device so that the buses are effectively isolated.

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.

The CD74FCT245 is characterized for operation from 0°C to 70°C.