SN74LV6T17-Q1: Level-Shift between 5V MCU and 3.3V ETHER-PHY

Masaru Oinaga

Part Number: SN74LV6T17-Q1
Other Parts Discussed in Thread: TXV0106-Q1,

Tool/software:

Hello, Team,

Our customer is looking for a level shifter which could handle 5V MCU IO and 3.3V ETHER-PHY IO.

We found TXV0106-Q1 as a recommended device for such application, but it only supports up to 3.3V (correct me if wrong.)

Can we use SN74LV6T17-Q1 instead?

Best,
Masaru

6 months ago

0 Clemens Ladisch 6 months ago

Guru 316440 points

What exactly is the protocol between the MCU and the PHY? *MII? SNI? What frequency?

0 Masaru Oinaga 6 months ago in reply to Clemens Ladisch

TI__Expert 4355 points

Hello, Clemens,

Clemens Ladisch said:
What exactly is the protocol between the MCU and the PHY? *MII? SNI? What frequency?

We were thinking of *MII.

Best,
Masaru

0 Clemens Ladisch 6 months ago in reply to Masaru Oinaga

Guru 316440 points

MII? GMII? RMII? SGMII? RGMII?

+1 Joshua Salinas 6 months ago in reply to Masaru Oinaga

TI__Mastermind 21890 points

Hello Oinaga-san,

The reason Clemens is asking these questions is there are many types of MII protocols and each support different frequencies. For example, RGMII can support 10, 100, or 1000Mbps. Want to make sure we are recommending the correct part for your application.

Regards,

Josh

+1 Masaru Oinaga 6 months ago in reply to Joshua Salinas

TI__Expert 4355 points

Hello, Joshua, Clemens,

Sorry for the late follow-up. They are thinking of using SGMII and would also want a level-shifter solution for MDIO/MDC.

Best,
Masaru

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SN74LV6T17-Q1: Level-Shift between 5V MCU and 3.3V ETHER-PHY