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Level Translating Fast-Mode Plus I2C Bus/SMBus Repeater

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The PI6ULS5V9617C is a CMOS integrated circuit intended for Fast-mode Plus (Fm+) I2 C-bus or SMBus applications. It can provide level shifting between lower voltages (down to 0.6V) and higher voltages (2.2V to 5.5V) in mixed-mode applications.

The PI6ULS5V9617C enables the system designer to isolate two halves of a bus for both voltage and capacitance, accommodating more I2 C devices or longer trace length. It also permits extension of the I2 C-bus by providing bidirectional buffering for both the data (SDA) and the clock (SCL) lines, thus enabling two buses of 540 pF at 1 MHz, or up to 4000 pF at lower speeds. The SDA and SCL pins are overvoltage-tolerant and are high-impedance when the PI6ULS5V9617C is unpowered.

The 2.2V to 5.5V bus port B drivers have the static level offset, while the adjustable voltage bus port A drivers eliminate the static offset voltage. This results in a LOW on the port B, translating into a nearly 0V LOW on the port A and accommodating the smaller voltage swings of lower voltage logic. The EN pin is referenced to VCC(B) and can also be used to turn the drivers on and off under system control.


  • 2-channel, bidirectional buffer isolates capacitance and allows 540pF on either side of the device at 1 MHz and up to 4000 pF at lower speeds
  • Voltage level translation from 0.6V to 5.5V and from 2.2V to 5.5V
  • Footprint and functional replacement for PI6ULS5V9617C at Fast-mode speeds
  • Port A operating supply voltage range of 0.6V to 5.5V with normal levels(0.4VCC(A) + 0.8V ≤ VCC(B) )
  • Port B operating supply voltage range of 2.2V to 5.5V with static offset level
  • 5V tolerant I2 C-bus and enable pins
  • 0 Hz to 1 MHz clock frequency (the maximum system operating frequency may be less than 1MHz because of the delays added by the repeater)
  • Active HIGH repeater enable input referenced to VCC(B)
  • Open-drain input/outputs
  • Latching free operation
  • Supports arbitration and clock stretching across the repeater
  • Accommodates Standard-mode, Fast-mode, and Fastmode Plus I2 C-bus devices, SMBus (standard and high power mode), PMBus, and multiple masters
  • Powered-off high-impedance I2 C-bus pins
  • ESD protection exceeds 6000V HBM per JESD22-A114
  • 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-Q100/101/104/200, PPAP capable, and manufactured in IATF 16949 certified facilities), please contact us or your local Diodes representative. https://www.diodes.com/quality/product-definitions/
  • Packaging (Pb-free & Green):
    • 8-pin, MSOP (U)
    • 8-pin, 2x3 UDFN (ZW)

Product Specifications

Product Parameters

Compliance (Only Automotive supports PPAP) Standard
Translation From (V) 0.6 to 5.5
Translation To (V) 2.2 to 5.5
Max Signal Rate 1MHz
Bits Needed 2
Auto Direction Sensing? No
Shift Bi-Directional
Prop Delay N/A
Ambient or Junction Temperature (°C) -40 to 85

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