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TXV0108-Q1

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Automotive dual-supply fixed-direction eight-channel voltage translator

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Data sheet

TXV0108-Q1

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Data sheet Order now

Product details

Technology family AVC Applications GPIO, JTAG, SPI, UART Bits (#) 8 High input voltage (min) (V) 1.08 High input voltage (max) (V) 3.6 Vout (min) (V) 1.65 Vout (max) (V) 3.63 Data rate (max) (MBps) 0.25 IOH (max) (mA) -12 IOL (max) (mA) 12 Supply current (max) (µA) 16 Features Output enable, Overvoltage tolerant inputs, Partial power down (Ioff), Vcc isolation Input type Standard CMOS Output type 3-State Rating Automotive Operating temperature range (°C) -40 to 125
Technology family AVC Applications GPIO, JTAG, SPI, UART Bits (#) 8 High input voltage (min) (V) 1.08 High input voltage (max) (V) 3.6 Vout (min) (V) 1.65 Vout (max) (V) 3.63 Data rate (max) (MBps) 0.25 IOH (max) (mA) -12 IOL (max) (mA) 12 Supply current (max) (µA) 16 Features Output enable, Overvoltage tolerant inputs, Partial power down (Ioff), Vcc isolation Input type Standard CMOS Output type 3-State Rating Automotive Operating temperature range (°C) -40 to 125
VQFN (RGY) 24 19.25 mm² 5.5 x 3.5
  • AEC-Q100 qualified for automotive applications
  • Integrated damping output resistor
  • Pin compatible with SN74AVC8T245
  • Direction controlled voltage level shifter and buffer for general and skew sensitive applications
  • Meets RGMII 2.0 standard timing specifications:
    • < 750 ps rise and fall time
    • < 400 ps channel to channel skew
    • < ± 5% duty cycle distortion
  • Fully configurable symmetric dual-rail design allows each port to operate from 1.65 V to 3.6 V
  • Supports up to 320-Mbps for 1.65 V to 3.6 V
    • 250-Mbps maximum to meet RGMII timing specs
  • High drive strength (up to 12 mA at 3.6 V)
  • Low power consumption:
    • 10-µA maximum (25°C)
    • 20-µA maximum (–40°C to 125°C)
  • V CC isolation and V CC disconnect (I off-float) feature
    • If either V CC supply is < 100 mV or disconnected, then all I/Os get pulled-down and then become high-impedance
  • I off supports partial-power-down mode operation
  • Operating temperature from –40°C to +125°C
  • Latch-up performance exceeds 100 mA per JESD 78, Class II
  • ESD protection exceeds JESD 22:
    • 2000-V Human-Body Model
    • 1000-V Charged-Device Model
  • AEC-Q100 qualified for automotive applications
  • Integrated damping output resistor
  • Pin compatible with SN74AVC8T245
  • Direction controlled voltage level shifter and buffer for general and skew sensitive applications
  • Meets RGMII 2.0 standard timing specifications:
    • < 750 ps rise and fall time
    • < 400 ps channel to channel skew
    • < ± 5% duty cycle distortion
  • Fully configurable symmetric dual-rail design allows each port to operate from 1.65 V to 3.6 V
  • Supports up to 320-Mbps for 1.65 V to 3.6 V
    • 250-Mbps maximum to meet RGMII timing specs
  • High drive strength (up to 12 mA at 3.6 V)
  • Low power consumption:
    • 10-µA maximum (25°C)
    • 20-µA maximum (–40°C to 125°C)
  • V CC isolation and V CC disconnect (I off-float) feature
    • If either V CC supply is < 100 mV or disconnected, then all I/Os get pulled-down and then become high-impedance
  • I off supports partial-power-down mode operation
  • Operating temperature from –40°C to +125°C
  • Latch-up performance exceeds 100 mA per JESD 78, Class II
  • ESD protection exceeds JESD 22:
    • 2000-V Human-Body Model
    • 1000-V Charged-Device Model

The TXV0108-Q1 is a 8-bit, dual-supply direction controlled low-skew voltage translation device. This device can be used for buffering or redriving, voltage translation and power up isolation on transmitting skew sensitive interface, such as RGMII signals between MAC and PHY. Ax pins and control pins (DIR, OE) are referenced to V CCA logic levels, and Bx pins are referenced to V CCB logic levels. This device has an improved channel-to-channel skew, duty cycle distortion and symmetric rise or fall timing for applications requiring strict timing conditions.

This device is fully specified for partial-power-down applications using I off. The I off circuitry disables the outputs, thus preventing damaging current backflow through the device when it is powered down.

The V CC isolation feature is designed so that if either V CC supply is at or near 0 V both ports will switch to a high-impedance state. This feature enables power isolation for communications across multiple MACs and PHYs, and is beneficial in situations where MACs and PHYs are powered up asynchronously preventing current backflow between devices.

A high on DIR allows data transmission from A to B while a low on DIR allows data transmission from B to A when OE is set to low. When OE is set to high, both Ax and Bx pins will be forced into a high-impedance state. See Device Functional Modes for a summary of the operation of the control logic.

The TXV0108-Q1 is a 8-bit, dual-supply direction controlled low-skew voltage translation device. This device can be used for buffering or redriving, voltage translation and power up isolation on transmitting skew sensitive interface, such as RGMII signals between MAC and PHY. Ax pins and control pins (DIR, OE) are referenced to V CCA logic levels, and Bx pins are referenced to V CCB logic levels. This device has an improved channel-to-channel skew, duty cycle distortion and symmetric rise or fall timing for applications requiring strict timing conditions.

This device is fully specified for partial-power-down applications using I off. The I off circuitry disables the outputs, thus preventing damaging current backflow through the device when it is powered down.

The V CC isolation feature is designed so that if either V CC supply is at or near 0 V both ports will switch to a high-impedance state. This feature enables power isolation for communications across multiple MACs and PHYs, and is beneficial in situations where MACs and PHYs are powered up asynchronously preventing current backflow between devices.

A high on DIR allows data transmission from A to B while a low on DIR allows data transmission from B to A when OE is set to low. When OE is set to high, both Ax and Bx pins will be forced into a high-impedance state. See Device Functional Modes for a summary of the operation of the control logic.
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Technical documentation

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* Data sheet TXV0108-Q1 Automotive 8-Bit Direction Controlled Low-Skew, Low-Jitter Voltage Translator or Buffer datasheet PDF | HTML 24 Jul 2023
Application note Enabling Industrial and Automotive Ethernet RGMII Interfaces with Voltage Transl PDF | HTML 02 Aug 2023

Design & development

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Evaluation board

14-24-NL-LOGIC-EVM — Generic 14 through 24 pin non-leaded package evaluation module

Flexible EVM designed to support any logic or translation device that has a BQA, BQB, RGY (14-24 pin), RSV, RJW, or RHL package.
User guide: PDF | HTML
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VQFN (RGY) 24 View options
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