Overview
The Texas Instruments TCA9509RVHR is a robust level translator device designed for I2C and SMBus applications. This integrated circuit facilitates seamless communication between devices operating at different voltage levels, making it an essential component for modern electronic systems that require interoperability between 1.8V, 2.5V, 3.3V, and 5V buses. The TCA9509RVHR is particularly adept at translating signals between different voltage domains, ensuring signal integrity in mixed-voltage systems without the need for direction pin control.
Key Specifications
| Category | Description |
|---|---|
| Manufacturer | Texas Instruments |
| Part Number | TCA9509RVHR |
| Package | X2-QFN-8 (1.6x1.6 mm) |
| Operating Supply Voltage | 2.7V to 5.5V |
| Input/Output Voltage Levels | Up to 5.5V, down to 0.9V |
| Bus Compatibility | I2C and SMBus |
| Operational Temperature Range | -40°C to +85°C |
| Bus Capacitance | Up to 400 pF on the B-side |
| Overvoltage Tolerance | Up to 5.5V on both A-side and B-side I/Os |
Key Features
- Dual Bidirectional Buffer: Buffers both the serial data (SDA) and the serial clock (SCL) signals on the I2C bus.
- Voltage-Level Translation: Provides bidirectional voltage-level translation between low voltages (down to 0.9V) and higher voltages (2.7V to 5.5V).
- Hot-Swappable: Supports hot-swappable I²C-bus and SMBus applications, allowing devices to be replaced or upgraded without powering down the entire system.
- Fail-Safe Operation: Prevents the bus from being stuck in a low state if the input is left floating or the connected device is powered off, ensuring the bus remains in a high-impedance state.
- Compact Package: Encased in a compact X2-QFN-8 package, suitable for space-constrained applications.
- Thermal Performance: Operates reliably with a junction-to-ambient thermal resistance of 160.3°C/W.
Applications
- Mixed-Voltage Systems: Ideal for systems requiring interoperability between different voltage levels.
- Server Farms and Telecommunications: Supports hot-swappable applications, ensuring continuous operation.
- Industrial and Automotive Systems: Reliable operation in a wide temperature range (-40°C to +85°C).
- Modular Systems: Facilitates the extension of I2C and SMBus systems without performance degradation.
Q & A
- What is the primary function of the TCA9509RVHR?
The TCA9509RVHR is a level-translating I2C and SMBus bus repeater, designed to facilitate communication between devices operating at different voltage levels.
- What are the supported voltage levels for the TCA9509RVHR?
The device supports voltage levels from 0.9V to 5.5V, allowing for bidirectional voltage-level translation.
- What is the package type of the TCA9509RVHR?
The TCA9509RVHR is packaged in an X2-QFN-8 (1.6x1.6 mm) package.
- Does the TCA9509RVHR support hot-swapping?
Yes, it supports hot-swappable I²C-bus and SMBus applications, allowing devices to be replaced or upgraded without powering down the system.
- What is the operational temperature range of the TCA9509RVHR?
The device operates reliably in a temperature range of -40°C to +85°C).
- Is the TCA9509RVHR overvoltage tolerant?
Yes, all inputs and B-side I/Os are overvoltage tolerant up to 5.5V).
- What is the maximum bus capacitance supported by the TCA9509RVHR?
The device supports up to 400 pF bus capacitance on the B-side).
- Does the TCA9509RVHR have fail-safe operation?
Yes, it prevents the bus from being stuck in a low state if the input is left floating or the connected device is powered off).
- What are some common applications for the TCA9509RVHR?
Common applications include mixed-voltage systems, server farms, telecommunications, industrial systems, and automotive systems).
- Where can I find detailed specifications and datasheets for the TCA9509RVHR?
Detailed specifications and datasheets can be found on the Texas Instruments website and other electronic component databases such as Digi-Key, Mouser, and LCSC).
