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Level-Translating I2C Bus Repeater


Package | PIN: DGK | 8
Temp: I (-40 to 85)
Carrier: Cut Tape
Qty Price
1-9 $0.83
10-24 $0.74
25-99 $0.69
100-249 $0.60
250-499 $0.55
500-749 $0.46
750-999 $0.38
1000+ $0.35


  • Two-Channel Bidirectional I2C Buffer
  • Support for Standard Mode, Fast Mode (400 kHz), and Fast Mode+ (1 MHz) I2C Operation
  • Operating Supply Voltage Range of 0.8 V to 5.5 V on A-Side
  • Operating Supply Voltage Range of 2.2 V to 5.5 V on B-Side
  • Voltage-Level Translation From 0.8 V to 5.5 V and 2.2 V to 5.5 V
  • Footprint and Function Replacement for TCA9517
  • Active-High Repeater-Enable Input
  • Open-Drain I2C I/O
  • 5.5-V Tolerant I2C and Enable Input Support
  • Lockup-Free Operation
  • Powered-Off High-Impedance I2C Bus Pins
  • Support for Clock Stretching and Multiple Master Arbitration Across The Device
  • Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
  • ESD Protection Exceeds JESD 22
    • 4000-V Human-Body Model (A114-A)
    • 1500-V Charged-Device Model (C101)

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Texas Instruments  TCA9617BDGKR

The TCA9617B is a BiCMOS dual bidirectional buffer intended forI2C bus and SMBus systems. It can provide bidirectional voltage-leveltranslation (up-translation and down-translation) between low voltages (down to 0.8 V) and highervoltages (2.2 V to 5.5 V) in mixed-mode applications. This device enablesI2C and similar bus systems to be extended, without degradation ofperformance even during level shifting.

The TCA9617B buffers both the serial data (SDA) and the serial clock (SCL) signals on theI2C bus, allowing two buses of 550 pF to be connected in anI2C application. This device can also be used to isolate two halves of abus for voltage and capacitance.