SN74LV245AT - Octal Bus Transceiver With 3-State Outputs

This octal bus transceiver is designed for asynchronous two-way communication between data buses. The control-function implementation minimizes external timing requirements.

The SN74LV245AT allows data transmission 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) 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 V_CC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

This device is fully specified for partial-power-down applications using I_off. The I_off circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down.

Products containing the "SN74LV245AT" keyword are: SN74LV245ATDBR , SN74LV245ATDBR , SN74LV245ATDBRG4 , SN74LV245ATDGVR , SN74LV245ATDGVR , SN74LV245ATDGVRG4 , SN74LV245ATDW , SN74LV245ATDW , SN74LV245ATDWR , SN74LV245ATDWR , SN74LV245ATNS , SN74LV245ATNSE4 , SN74LV245ATNSE4 , SN74LV245ATNSG4 , SN74LV245ATNSG4 , SN74LV245ATNSR , SN74LV245ATNSR , SN74LV245ATPW , SN74LV245ATPW , SN74LV245ATPWR

• Inputs Are TTL-Voltage Compatible
• 4.5-V to 5.5-V V_CC Operation
• Typical t_pd of 3.5 ns at 5 V
• Typical V_OLP (Output Ground Bounce) <0.8 V
  at V_CC = 5 V, T_A = 25°C
• Typical V_OHV (Output V_OH Undershoot) >2.3 V
  at V_CC = 5 V, T_A = 25°C
• Supports Mixed-Mode Voltage Operation on All Ports
• I_off Supports Partial-Power-Down Mode Operation
• Latch-Up Performance Exceeds 250 mA Per JESD 17
• ESD Protection Exceeds JESD 22
  • 2000-V Human-Body Model (A114-A)
  • 1000-V Charged-Device Model (C101)