Data Sheet
TCA9509 Level-Translating I2C and SMBUS Bus Repeater
1 Features
- Two-channel bidirectional buffer
- I2C bus and SMBus compatible
- Operating supply voltage range of 2.7V to 5.5V on B side
- Operating voltage range of 0.9V to 5.5V on A side
- Voltage-level translation from 0.9V to 5.5V and 2.7V to 5.5V
- Active-high repeater-enable input
- Requires no external pullup resistors on lower-voltage port-A
- Open-drain I2C I/O
- 5.5-V Tolerant I2C and enable input support mixed-mode signal operation
- Lockup-free operation
- Accommodates standard mode and fast mode I2C devices and multiple controllers
- Supports arbitration and clock stretching across Repeater
- Powered-off high-impedance I2C bus pins
- Supports 400-kHz fast I2C bus operating speeds
- Available in
- 1.6mm × 1.6mm, 0.4mm height, 0.5mm pitch QFN package
- 3mm × 3mm Industry standard MSOP package
- Latch-up performance exceeds 100mA Per JESD 78, class II
- ESD protection exceeds JESD 22
- 2000V Human-body model (A114-A)
- 1000V Charged-device model (C101)
2 Applications
- Servers
- Routers (Telecom Switching Equipment)
- Industrial Equipment
- Products with many I2C targets and or long PCB Traces
Device Information
| PART NUMBER | PACKAGE (1) | BODY SIZE (NOM) |
|---|---|---|
| TCA9509 | VSSOP (8) | 3.00mm × 3.00mm |
| X2QFN (8) | 1.60mm × 1.60mm |
(1) For all available packages, see the orderable addendum at the
end of the data sheet.
Simplified Schematic