SDAA560 October   2026 SN74UVP1G04 , SN74UVP1G04-Q1 , SN74UVP1G06 , SN74UVP1G06-Q1 , SN74UVP1G07 , SN74UVP1G07-Q1 , SN74UVP1G14 , SN74UVP1G14-Q1 , SN74UVP1G16 , SN74UVP1G16-Q1 , SN74UVP1G17 , SN74UVP1G17-Q1 , SN74UVP1G37 , SN74UVP1G37-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Detailed Description
    1. 2.1 Applications
    2. 2.2 Power Consumption
    3. 2.3 Timing at Low Supply Voltage
    4. 2.4 Power-Up, Power-Down, and Ioff Behavior
  6. 3Summary
  7. 4References

2.4 Power-Up, Power-Down, and Ioff Behavior

In multi-rail systems, the SN74UVP can be unpowered (VCC = 0V) while another device connected to the input or output of SN74UVP remains active. Without protection, current can flow from the active signal into the VCC rail of the unpowered device, causing back-powering and unintended circuit behavior.

The SN74UVP family includes Ioff partial-power-down protection. When VCC = 0V, the Ioff circuitry limits leakage current into the input and output pins to a maximum of ±1µA, preventing back-powering of the supply rail. The inputs and outputs of the SN74UVP can tolerate applied voltages up to 5.5V under recommended operating conditions when VCC = 0V.