74LVC244A集成电路（IC）的缓冲器驱动器接收器收发器规格书PDF中文资料

74LVC244A属于集成电路（IC）的缓冲器驱动器接收器收发器。由美台半导体制造生产的74LVC244A缓冲器，驱动器，接收器，收发器逻辑缓冲器、驱动器、接收器和收发器允许隔离对某个电路的逻辑信号的访问，以用于另一电路。缓冲器将其输入信号（不变或反相）传递到其输出，并可能用于清除弱信号或驱动负载。在布尔逻辑仿真器中，缓冲器主要用于增加传播延迟。逻辑接收器和收发器允许在数据总线之间进行隔离通信。

描述 Description

The 74LVC244A provides two 4-bit line drivers with separate outputenable (OE) inputs. When OE is low, the device passes data from the A inputs to the Y outputs. When OE is high, the outputs are in the high-impedance state.

The device is designed for operation with a power supply range of 1.65V to 3.6V.

The inputs are tolerant to 5.5V allowing this device to be used in a mixed voltage environment. The device is fully specified for partial power down applications using IOFF. The IOFF circuitry disables the output preventing damaging current backflow when the device is powered down.

特性 Features

• Supply Voltage Range from 1.65V to 3.6V

• Sinks or Sources 24ma at VCC = 3V

• CMOS Low Power Consumption

• IOFF Supports Partial - Power Down Operation

• Inputs or Outputs Accept up to 5.5V

• Inputs can be Driven by 3.3V or 5V Allowing for Mixed Voltage Applications

• Schmitt Trigger Action at All Inputs

• Typical VOLP (Quiet Output Ground Bounce) Less than 0.8V with VCC = 3.3V and TA = +25°C

• Typical VOHV (Quiet Output Dynamic VOH) Greater than 2.0V with VCC = 3.3V and TA = +25°C

• ESD Protection Tested per JESD 22

◾ Exceeds 200-V Machine Model (A115)

◾ Exceeds 2000-V Human Body Model (A114)

◾ Exceeds 1000-V Charged Device Model (C101)

• Latch-Up Exceeds 250mA per JESD 78, Class I

• All devices are:

◾ Totally Lead-Free & Fully RoHS compliant (Notes 1 & 2)

◾ Halogen and Antimony Free. “Green” Device (Note 3)

Applications

• General Purpose Logic

• Bus Driving

• Power Down Signal Isolation

• Wide array of products such as:

◾ PCs, Notebooks, Netbooks, Ultrabooks

◾ Networking Computer Peripherals, Hard Drives, CD/DVD ROM

◾ TV, DVD, DVR, Set Top Box