SN74LVT244B - 3.3-V ABT Octal Buffers/Drivers With 3-State Outputs

This octal buffer and line driver is designed specifically for low-voltage (3.3-V) V_CC operation, but with the capability to provide a TTL interface to a 5-V system environment.

The SN74LVT244B is organized as two 4-bit line drivers with separate output-enable (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.

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 hot-insertion applications using I_off and power-up 3-state. The I_off circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down. The power-up 3-state circuitry places the outputs in the high-impedance state during power up and power down, which prevents driver conflict.

Products containing the "SN74LVT244B" keyword are: SN74LVT244BDB , SN74LVT244BDBR , SN74LVT244BDBR , SN74LVT244BDBR/BKN , SN74LVT244BDBRE4 , SN74LVT244BDBRE4 , SN74LVT244BDBRG4 , SN74LVT244BDW , SN74LVT244BDW , SN74LVT244BDWG4 , SN74LVT244BDWG4 , SN74LVT244BDWR , SN74LVT244BDWR , SN74LVT244BDWR SOP7.2 , SN74LVT244BDWRE4 , SN74LVT244BDWRE4 , SN74LVT244BDWRG4 , SN74LVT244BDWRG4 , SN74LVT244BGQNR , SN74LVT244BGQNR

• Supports Mixed-Mode Signal Operation (5-V Input and Output Voltages With 3.3-V V_CC)
• Supports Unregulated Battery Operation Down to 2.7 V
• Typical V_OLP (Output Ground Bounce)
     <0.8 V at V_CC = 3.3 V, T_A = 25°C
• I_off and Power-Up 3-State Support Hot Insertion
• Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
• ESD Protection Exceeds JESD 22
  • 2000-V Human-Body Model (A114-A)
  • 200-V Machine Model (A115-A)
  • 1000-V Charged-Device Model (C101)