Overview
The PCA9306TDCURQ1, produced by Texas Instruments, is a dual bidirectional I2C-bus and SMBus voltage-level translator. This component is designed to facilitate voltage translation between different voltage levels in mixed-mode I2C applications. It operates with an enable (EN) input and supports voltage translations from 1.2 V to 5 V without the need for a direction pin. The device is packaged in an 8-pin VSSOP (DCU) package and is AEC-Q100 qualified for automotive applications, ensuring reliability over a temperature range of –40°C to 105°C.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | VSSOP (DCU) | - |
| Pins | 8 | - |
| Operating Temperature Range | –40 to 105 | °C |
| VREF1 Range | 1.2 to 3.3 | V |
| VREF2 Range | 1.8 to 5.5 | V |
| Propagation Delay (tPLH) | 0 to 2.0 | ns |
| Propagation Delay (tPHL) | 0 to 2.5 | ns |
| ON-State Resistance (rON) | 2.4 to 6.0 | Ω |
| ESD Protection | 2000-V HBM, 200-V MM, 1000-V CDM | - |
Key Features
- 2-Bit bidirectional translator for SDA and SCL lines in mixed-mode I2C applications.
- Compatible with I2C and SMBus protocols.
- Less than 1.5-ns maximum propagation delay to support standard-mode and fast-mode I2C devices.
- Allows voltage-level translation between various voltage levels (e.g., 1.2 V to 5 V).
- No direction pin required for voltage translation.
- Low ON-state resistance (rON) for minimal signal distortion.
- Open-drain I2C I/O ports (SCL1, SDA1, SCL2, and SDA2) with 5-V tolerance.
- High-impedance SCL1, SDA1, SCL2, and SDA2 pins when EN is low.
- Lock-up-free operation and flow-through pinout for ease of PCB trace routing.
- AEC-Q100 qualified for automotive applications.
- ESD protection exceeds JESD 22 standards.
Applications
- Automotive systems: Given its AEC-Q100 qualification, it is suitable for various automotive applications requiring reliable voltage translation.
- Mixed-mode I2C/SMBus systems: Ideal for systems where different voltage levels need to be translated between I2C or SMBus controllers and target devices.
- Remote board insertion: Useful in scenarios where a remote board with I2C lines needs to be attached to a main board (backplane) with an I2C bus, preventing data corruption and unintended pulses on the SCL line.
- Industrial and consumer electronics: Any application requiring bidirectional voltage translation with low propagation delay and high ESD protection.
Q & A
- What is the primary function of the PCA9306TDCURQ1?
The primary function is to provide bidirectional voltage translation between different voltage levels in I2C and SMBus applications.
- What is the operating temperature range of the PCA9306TDCURQ1?
The operating temperature range is –40°C to 105°C.
- What are the supported voltage ranges for VREF1 and VREF2?
VREF1 supports 1.2 V to 3.3 V, and VREF2 supports 1.8 V to 5.5 V.
- What is the maximum propagation delay of the PCA9306TDCURQ1?
The maximum propagation delay is less than 2.5 ns.
- Does the PCA9306TDCURQ1 require a direction pin for voltage translation?
No, it does not require a direction pin for voltage translation.
- What is the ESD protection level of the PCA9306TDCURQ1?
The ESD protection level exceeds 2000-V HBM, 200-V MM, and 1000-V CDM.
- Is the PCA9306TDCURQ1 AEC-Q100 qualified?
- What is the purpose of the EN pin in the PCA9306TDCURQ1?
The EN pin is used to enable or disable the translator switch.
- How does the PCA9306TDCURQ1 handle high-impedance states?
When EN is low, the SCL1, SDA1, SCL2, and SDA2 pins are in a high-impedance state.
- What are some common applications of the PCA9306TDCURQ1?
Common applications include automotive systems, mixed-mode I2C/SMBus systems, and remote board insertion scenarios.
