74VCXH245屬于集成電路（IC）的緩沖器驅(qū)動(dòng)器接收器收發(fā)器。由安森美半導(dǎo)體公司制造生產(chǎn)的74VCXH245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(wèn)，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。

Low-Voltage 1.8/2.5/3.3 V 8-Bit Transceiver

(3?State, Non?Inverting with Bushold)

The 74VCXH245 is an advanced performance, non?inverting 8?bit transceiver. It is designed for very high?speed, very low?power operation in 1.8 V, 2.5 V or 3.3 V systems.

The 74VCXH245 is designed as a byte control. The Transmit/Receive (T/Rn) inputs determine the direction of data flow through the bidirectional transceiver. Transmit (active?HIGH) enables data from A ports to B ports; Receive (active?LOW) enables data from B to A ports. The Output Enable input (OE), when HIGH, disables both A and B ports by placing them in a HIGH Z condition. The data inputs include active bushold circuitry, eliminating the need for external pullup resistors to hold unused or floating inputs at a valid logic state.

? Designed for Low Voltage Operation: VCC = 1.65?3.6 V

? High Speed Operation:

3.5 ns max for 3.0 to 3.6 V

4.2 ns max for 2.3 to 2.7 V

8.4 ns max for 1.65 to 1.95 V

? Static Drive:

±24 mA Drive at 3.0 V

±18 mA Drive at 2.3 V

±6 mA Drive at 1.65 V

? Includes Active Bushold to Hold Unused or Floating Data Inputs at a

Valid Logic State

? Near Zero Static Supply Current in All Three Logic States (20 μA)

Substantially Reduces System Power Requirements

? Latchup Performance Exceeds ±200 mA @ 85°C

? ESD Performance: Human Body Model >2000 V; Machine Model >200 V