1 Features

• 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 V_CC.

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.

1. For all available packages, see the orderable addendum at the end of the data sheet.

Simplified Schematic