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Texas Instruments TCA9517 Level-Shifting I2C Bus Repeater

Texas Instruments TCA9517 Level-Shifting I2C Bus Repeater is a bi-directional buffer with level-shifting capabilities for I2C and SMBus systems. This repeater provides bi-directional voltage-level translation (up-translation/down-translation) between low voltages (down to 0.9V) and higher voltages (2.7V to 5.5V) in mixed-mode applications. The TCA9517 enables I2C and SMBus systems to be extended without performance degradation, even during level shifting.

Features

  • Two-channel bi-directional buffer
  • I2C Bus and SMBus compatible
  • Operating supply voltage range of 0.9V to 5.5V on A-side
  • Operating supply voltage range of 2.7V to 5.5V on B-side
  • Voltage-level translation from 0.9V to 5.5V to 2.7V to 5.5V
  • Footprint and functional replacement for PCA9515B
  • Active-high repeater-enable input
  • Open-drain I2C I/O
  • 5.5V Tolerant I2C and enable input support mixed-mode signal operation
  • Accommodates standard mode and fast mode I2C devices and multiple masters
  • High-impedance I2C pins when powered-off
  • Latch-up performance exceeds 100mA per JESD 78, class II
  • ESD Protection exceeds JESD 22
    • 5500V Human-body model (A114-A)
    • 200V Machine model (A115-A)
    • 1000V Charged-device model (C101)

Applications

  • Servers
  • Routers (Telecom switching equipment)
  • Industrial equipment
  • Products with many I2C slaves and/or long PC traces

Simplified Schematic

Schematic - Texas Instruments TCA9517 Level-Shifting I2C Bus Repeater
Published: 2018-07-13 | Updated: 2022-12-07