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The 74LVC2T45 is a dual-bit, dual-supply transceiver with tri-state outputs suitable for transmitting two logic bits across different voltage domains. The direction pin (DIR) and Port A, consisting of pins 1A and 2A, have logic levels in relation to VCC(A) while port B, consisting of pins 1B and 2B have logic levels related to VCC(B). This arrange- ment allows for universal low-voltage translation between any voltages from 1.2V to 5.5V. When a HIGH logic level is applied to the direction pin, port A pins become inputs and port B pins are outputs. Conversely, the roles of the ports are reversed when the direction pin is asserted LOW.

The tri-state (Ioff) feature places all port pins in a high impedance state when either power supply is at 0V, which prevents and damages backflow currents and provides power-down electrical isolation up to 5.5V as not to interfere with any logic activity on either of the ports.


  • Wide Supply Voltage Range:
  • VCC(A): from 1.2V to 5.5V
  • VCC(B): from 1.2V to 5.5V
  • ± 24mA Output Drive at 3.3V
  • CMOS Low Power Consumption 16µA Maximum ICC
  • High Noise Immunity
  • IOFF Supports Partial-Power-Down Mode Operation
  • IOFF Controlled by Either VCC Being at 0V
  • Inputs Accept up to 5.5V
  • Maximum data rates:
  • 420Mbps (3.3V to 5V translation)
  • 210Mbps (translate to 3.3V)
  • 140Mbps (translate to 2.5V)
  • 75Mbps (translate to 1.8V)
  • 60Mbps (translate to 1.5V)
  • ESD Protection Exceeds JESD 22
  • 4000-V Human Body Model (A114)
  • 1000 V Charged Device Model ( C101)
  • Latch-up Exceeds 100mA per JESD 78, Class I
  • Specified from -40°C to +85°C and -40°C to +125°C
  • Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
  • Halogen and Antimony Free. “Green” Device (Note 3)
  • For automotive applications requiring specific change
    control (i.e. parts qualified to AEC-Q100/101/200, PPAP capable, and manufactured in IATF 16949 certified facilities), please
    contact us or your local Diodes representative. https://www.diodes.com/quality/product-definitions/


  • Voltage Level Translation
    Well-Suited to Join Logic Types Operating at Different Voltages
  • Power-Down Signal Isolation
    If Either Voltage Domain is Turned Off the Signal is Isolated and There is No Loading on Signal Lines
  • Wide Array of Products, such as:
    • Cell Phones, Tablets, E-Readers
    • PCs, Notebooks, Netbooks, Ultrabooks
    • Networking, Routers, Gateways
    • Computer Peripherals, Hard Drives, CD/DVD ROM
    • TV, DVD, DVR, Set-Top Box
    • Personal Navigation / GPS
    • MP3 Players, Cameras, Video Recorders

Product Specifications

Product Parameters

Description Dual Bit Voltage Translator
Number of Gates 2
Family LVC
VCC Min (V) 1.2 V
VCC Max (V) 5.5 V
tpd max @ (1.5V) 21.3 ns
tpd max @ 1.8V (ns) 17.7 ns
tpd max @ 2.5V (ns) 8.5 ns
tpd max @ 3.3V (ns) 5.6 ns
tpd max @ 5.0V (ns) 3.9 ns
Input/ Output Current 24
Output Type Push-Pull

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