SN74LVTH126 - 3.3-V ABT Quadruple Bus Buffers With 3-State Outputs

These bus buffers are 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 ’LVTH126 devices feature independent line drivers with 3-state outputs. Each output is in the high-impedance state when the associated output-enable (OE) input is low.

Active bus-hold circuitry holds unused or undriven inputs at a valid logic state. Use of pullup or pulldown resistors with the bus-hold circuitry is not recommended.

When V_CC is between 0 and 1.5 V, the device is in the high-impedance state during power up or power down. However, to ensure the high-impedance state above 1.5 V, OE should be tied to GND through a pulldown resistor; the minimum value of the resistor is determined by the current-sourcing capability of the driver.

These devices are 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 devices when they are 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 "SN74LVTH126" keyword are: SN74LVTH126D , SN74LVTH126D , SN74LVTH126DBR , SN74LVTH126DBR , SN74LVTH126DBRG4 , SN74LVTH126DGVR , SN74LVTH126DGVR , SN74LVTH126DR , SN74LVTH126DR , SN74LVTH126DRG4 , SN74LVTH126DRG4 , SN74LVTH126NS , SN74LVTH126NSR , SN74LVTH126NSR , SN74LVTH126PW , SN74LVTH126PW , SN74LVTH126PWG4 , SN74LVTH126PWG4 , SN74LVTH126PWR , SN74LVTH126PWR

• Support Mixed-Mode Signal Operation (5-V Input and Output Voltages With 3.3-V V_CC)
• Support 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
• Bus Hold on Data Inputs Eliminates the Need for External Pullup/Pulldown Resistors
• 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)