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.