Packaging information
| Package | Pins VSSOP (DGK) | 8 |
| Operating temperature range (°C) -40 to 85 |
| Package qty | Carrier 2,500 | LARGE T&R |
Features for the TCA9509
- Two-channel bidirectional buffer
- I2C bus and SMBus compatible
- Operating supply voltage range of 2.7 V to 5.5 V on B side
- Operating voltage range of 0.9 V to 5.5 V on A side
- Voltage-level translation from 0.9 V to 5.5 V and 2.7 V to 5.5 V
- 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
- 1.6-mm × 1.6-mm, 0.4-mm height, 0.5-mm pitch QFN package
- 3-mm × 3-mm Industry standard MSOP package
- Latch-up performance exceeds 100 mA Per JESD 78, class II
- ESD protection exceeds JESD 22
- 2000-V Human-body model (A114-A)
- 1000-V Charged-device model (C101)
Description for the TCA9509
This TCA9509 integrated circuit is an I2C bus/SMBus Repeater for use in I2C/SMBus systems. It can also provide 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 similar bus systems to be extended, without degradation of performance even during level shifting.
The TCA9509 buffers both the serial data (SDA) and the serial clock (SCL) signals on the I2C bus, thus allowing 400-pF bus capacitance on the B-side. This device can also be used to isolate two halves of a bus for voltage and capacitance.
The TCA9509 has two types of drivers – A-side drivers and B-side drivers. All inputs and B-side I/Os are overvoltage tolerant to 5.5 V. The A-side I/Os are overvoltage tolerant to 5.5 V when the device is unpowered (VCCB and/or VCCA = 0 V).