Diodes Incorporated
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Single Bit Dual Power Supply Translating Buffer with 3 State Outputs

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The 74AUP1T34Q is an automotive, AEC-Q qualified, single-bit, dual-supply, non-inverting buffer translator suitable for transmitting a single logic bit across different voltage domains. It is a uni-directional translator from A to Y. The input Pin A has input switching thresholds related to VCCA, operating from 0.9 V to 3.6 V. The output Pin Y has a HIGH level output voltage that tracks VCCB, also operating from 0.9V to 3.6V. This arrangement allows for universal low-voltage translation between any voltages from 0.9V to 3.6V.

The three-state feature occurs when the VCCA power supply voltages are zero. This is also an IOFF feature and allows the output to remain in a high-impedance state, preventing damaging backflow currents and providing power-down electrical isolation of up to 3.6V. If the VCCB is at ground, the input circuits at Pin A are disabled and no input current flows regardless of any applied voltage between 0 and 3.6V.

The 74AUP1T34Q is available in the SOT353 package, and is specified for operation from -40°C to +125°C among all supply voltages. The wide temperature ranges and high ESD tolerance facilitate their use in harsh applications.


  • Temperature range: -40°C to +125°C
  • Wide supply voltage range:
    • VCC(A): from 0.9V to 3.6V
    • VCC(B): from 0.9V to 3.6V
  • ± 6mA output drive at 3V
  • Low-static power consumption; ICC = 5 μA (maximum)
  • High noise immunity (100mV hysteresis typical)
  • IOFF supports partial-power-down mode operation
  • IOFF controlled by VCCB being at 0V
  • Input isolation when VCCA is ground; no input current even when floating
  • ESD protection exceeds JESD 22
    • Exceeds 5000V Human Body Model (A114)
    • Exceeds 1000V Charged Device Model (C101)
  • Latch-up exceeds 100mA per JESD 78, class II
  • Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
  • Halogen and Antimony Free. “Green” Device (Note 3)
  • The 74AUP1T34Q is suitable for automotive applications requiring specific change control; this part is AEC-Q100 qualified, PPAP capable, and manufactured in IATF16949 certified facilities. https://www.diodes.com/quality/product-definitions/


  • Voltage level translation:
    • Well suited to join logic types operating at different voltages
  • Power-down signal isolation:
    • When VCCA = GND output is three-state
    • When VCCB = GND input is disabled and may be left floating
  • Wide array of products such as:
    • Vehicle electronic control units (ECU)
    • Vehicle autonomous systems
    • Advanced driver assistance systems (ADAS)
    • Industrial devices
    • Personal electronics
    • Telecommunications

Product Specifications

Product Parameters

Function Transceiver
Type Buffers/Inverters/Transceivers
Compliance (Only Automotive supports PPAP) Automotive
Channels 1
Family AUP
VCC Min (V) 0.9
VCC Max (V) 3.6
Input Type Standard CMOS
Output Type 3-State
Output Current (mA) 50

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