TCA9517DGKR UART Interface IC Signal Buffers, Repeaters Level-Translating I2C Bus Repeater

1 Features

• Two-Channel Bidirectional Buffer

• I2C Bus and SMBus Compatible

• Operating Supply Voltage Range of 0.9 V to 5.5 V on A-side

• Operating Supply Voltage Range of 2.7 V to 5.5 V on B-side

• Voltage-Level Translation From 0.9 V - 5.5 V to 2.7V-5.5V

• Footprint and Functional Replacement for PCA9515B

• Active-High Repeater-Enable Input

• Open-Drain I2C I/O

• 5.5-V Tolerant I2C and Enable Input Support Mixed-Mode Signal Operation

• Accommodates Standard Mode and Fast Mode I2C Devices and Multiple Masters

• High-Impedance I2C Pins When Powered-Off

• Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II

• ESD Protection Exceeds JESD 22

2 Applications

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

3 Description

5500 V Human-Body Model (A114-A) 200 V Machine Model (A115-A)
1000 V Charged-Device Model (C101)

The TCA9517 is a bidirectional buffer with level shifting capabilities for I2C and SMBus systems. It provides bidirectional voltage-level translation (up- translation/down-translation) between low voltages (down to 0.9 V) and higher voltages (2.7 V to 5.5 V) in mixed-mode applications. This device enables I2C and SMBus systems to be extended without degradation of performance, even during level shifting.

The TCA9517 buffers both the serial data (SDA) and the serial clock (SCL) signals on the I2C bus, thus allowing two buses of up to 400-pF bus capacitance to be connected in an I2C application.

The TCA9517 has two types of drivers: A-side drivers and B-side drivers. All inputs and I/Os are over- voltage tolerant to 5.5 V, even when the device is unpowered (VCCB and/or VCCA = 0 V).

Device Information