Why TXS0108 os Better than TXB0108? 

 TXB0108 is only used for push pull, it can not used at Open drain required, but TXS0108 can work both push pull and open drian.

1 Features 

• No Direction-Control Signal Needed configurable power-supply rails. 

• Max Data Rates 

– 60 Mbps (Push Pull) 

– 2 Mbps (Open Drain)

• 1.2 V to 3.6 V on A Port and 1.65 V to 5.5 V on B Port (VCCA ≤ VCCB) 

• No Power-Supply Sequencing Required – VCCA or VCCB Can Be Ramped First 

• Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II 

• ESD Protection Exceeds JESD 22 (A Port)

 – 2000-V Human Body Model (A114-B) 

– 150-V Machine Model driver. (A115-A)

 – 1000-V Charged-Device Model (C101) 

 • IEC 61000-4-2 ESD (B Port) 

– ±8-kV Contact Discharge 

 – ±6-kV Air-Gap Discharge 


    Because the Arduino (and Basic Stamp) are 5V devices, and most modern sensors, displays, flash cards and modes are 3.3V-only, many makers find that they need to perform level shifting/conversion to protect the 3.3V device from 5V.

    Although one can use resistors to make a divider, for high speed transfers, the resistors can add a lot of slew and cause havoc that is tough to debug. For that reason, we like using 4050/74LVX245 series and similar logic to perform proper level shifting. Only problem is that they are only good in one direction which can be a problem for some specialty bi-diectional interfaces and also makes wiring a little hairy.

    That's where this lovely chip, the TXS0108 bi-directional level converter comes in! This chip perform bidirectional level shifting from pretty much any voltage to any voltage and will auto-detect the direction.  TXS0108 works even with i2c but TXB0108 do not work as i2c  isopen drain. Since this chip is a special bi-directional level shifter it does not have strong output pins that can drive LEDs or long cables, it's meant to sit on a breadboard between two logic chips! If you do not need instant bi-directional support, we suggest the 74LVX245 as below which has strong output drive.

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8 Channel Bi-Directional Logic Level Converter

  • Product Code: 8CHLLC
  • Availability: 25
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