SN74LVT125QPWRQ1

This bus buffer is designed for low-voltage (3.3-V) VCC operation while providing the capability to interface with 5-V system environments using TTL levels. The SN74LVT125-Q1 features independent line drivers with 3-state outputs. When the associated output enable (OE) input is high, each output is in the high-impedance state. The active bus-hold circuit holds unused or undriven inputs at a valid logic state. The use of pullup or pulldown resistors in conjunction with this bus-hold circuit is not recommended. This device is fully characterized for partial-power-down applications using Ioff. The Ioff circuit disables the outputs, preventing damaging backflow current when the device is powered down. To ensure the high-impedance state during power-up or power-down, OE should be connected to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

Applications

• Automotive applications

Key features

• Automotive applications
• ESD protection exceeds 2000V per MIL-STD-883 Method 3015; exceeds 200V using machine model (C = 200 pF, R = 0 Ω)
• Mixed-mode signal operation (5-V I/O voltage with 3.3-V VCC)
• Unregulated battery operation down to 2.7 V
• Typical VOLP (output ground bounce) < 0.8 V at VCC = 3.3 V, TA = 25 ℃
• Ioff supports partial power-down mode operation
• Bus-hold data inputs eliminate external pull-up resistors