TCA9617BDGKR

TCA9617B is a BiCMOS dual bidirectional buffer designed for I²C bus and SMBus systems. This device provides bidirectional voltage level translation (up-translation and down-translation modes) between low voltage (as low as 0.8V) and higher voltage (2.2V to 5.5V) in mixed-supply applications. During level translation, the device extends I²C and similar bus systems without sacrificing system performance. The TCA9617B buffers the Serial Data (SDA) and Serial Clock (SCL) signals on the I²C bus, enabling two 550pF buses to be connected to a single I²C application. This device can also be used to partition a bus into separate voltage and capacitance segments.

Applications

• Servers
• Routers (telecom switching equipment)
• Industrial equipment
• Products with multiple I2C slave devices and/or long PCB traces

Key features

• Dual-channel bidirectional I²C buffer
• Supports Standard Mode, Fast Mode (400kHz), and Fast Mode+ (1MHz) I²C operation
• Side A operating supply voltage range: 0.8V to 5.5V
• Side B operating supply voltage range: 2.2V to 5.5V
• Voltage level translation from 0.8V to 5.5V and 2.2V to 5.5V
• Pin-compatible and functional drop-in replacement for TCA9517
• Active-high repeater enable input
• Open-drain I²C I/O
• 5.5V tolerant I²C and enable input support
• Latch-up-free operation
• Power-off high-impedance I²C bus pins
• Clock stretching and multi-master arbitration supported on-device
• Latch-up performance exceeds 100mA per JESD 78 Class II specification
• ESD protection performance exceeds JESD 22 specification: 4000V Human Body Model (A114-A), 1500V Charged Device Model (C101)