1 Features
1• 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
Repeater
• 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)

2 Applications
• Servers
• Routers (Telecom Switching Equipment)
• Industrial Equipment
• Products with Many I2C Slaves and Long PCB
Traces

3 Description
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.