PCA9515B Dual Bidirectional I2C Bus and SMBus Repeater, PCA9515B | TI.com

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Dual Bidirectional I2C Bus and SMBus Repeater, PCA9515B


Recommended alternative parts

  • TCA9803  -  This device has improved performance (better signal integrity, faster rise times, slew rate control) and reduces external components required


The PCA9515B is a BiCMOS dual bidirectional buffer integrated circuit intended for I2C bus and SMBus applications. The device contains two identical bidirectional open-drain buffer circuits that enables I2C and similar bus systems to be extended (or add slaves) without degrading system performance. The dual bidirectional I2C buffer is operational at 2.3 V to 3.6 V VCC.

The PCA9515B buffers both the serial data (SDA) and serial clock (SCL) signals on the I2C bus, while retaining all the operating modes and features of the I2C system. The device allows two buses, of 400-pF bus capacitance, to be connected in an I2C application.


  • Two-Channel Bidirectional Buffers
  • I2C Bus and SMBus Compatible
  • Support for I2C Standard Mode (100-kHz) and
    Fast Mode (400-kHz)
  • Active-High Repeater-Enable Input
  • Open-Drain I2C Input and Output
  • 5.5-V Tolerant I2C Input and Output and
    Enable Input Support Mixed-Mode Signal Operation
  • Lockup-Free Operation
  • Accommodates Standard Mode, Fast Mode I2C
    Devices, and Multiple Masters
  • Supports Arbitration and Clock Stretching Across
  • Powered-Off High-Impedance I2C Pins
  • Latch-Up Performance Exceeds 100-mA Per
    JESD 78, Class I
  • ESD Protection Exceeds JESD 22
    • 2000-V Human-Body Model (A114-A)
    • 1000-V Charged-Device Model (C101)


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Part number Order VCCA (Min) (V) VCCA (Max) (V) VCCB (Min) (V) VCCB (Max) (V) Supply restrictions Frequency (Max) (kHz) Features Operating temperature range (C) Approx. price (US$) Package Group Rating
PCA9515B Order now 2.3     3.6     2.3     3.6     VCC Single Supply     400     Buffer
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-40 to 85     0.65 | 1ku     VSSOP | 8     Catalog