74LVCH245A

Description

The 74LVCH245A is an octal transceiver designed for asynchronous communication between data buses. The device transmits data from the A bus to the B bus or from the B bus to the A bus, depending on the logic level at the direction-control (DIR) input. The output-enable (OE) pin can be used to disable the device so the buses effectively are isolated.

The device is designed for operation with a power supply range of OE 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 I_OFF. The I_OFF circuitry disables the output preventing damaging current backflow when the device is powered down.

Bus hold circuitry holds unused or undriven inputs at a high or low logic state. The use of external pull-up or pull down resistors is not recommended.

Feature(s)

• Supply Voltage Range from 1.65V to 3.6V 
• Sinks or Sources 24ma at V_CC = 3V 
• CMOS Low Power Consumption 
• I_OFF 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 V_OLP (Quiet Output Ground Bounce) Less Than 0.8V with V_CC = 3.3V and T_A = +25°C 
• Typical V_OHV (Quiet Output dynamic VOH) Greater than 2.0V with V_CC = 3.3V and T_A = +25°C 
• ESD Protection Tested per JESD 22
  • ƒ Exceeds 200-V Machine Model (A115) 
  • ƒ Exceeds 2000-V Human Body Model (A114) 
  • ƒ Exceeds 1000-V Charged Device Model (C101) 
• Latch-Up Exceeds 250mA per JESD 78, Class I 
• All devices are:
  • ƒ Totally Lead-Free & Fully RoHS compliant  
  • ƒ Halogen and Antimony Free. “Green” Device 

Application(s)

• 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