Overview
The PCA9306DCTRG4, produced by Texas Instruments, is a dual bidirectional I2C and SMBus voltage-level translator. This device is designed to facilitate bidirectional voltage translations between two different voltage domains, ranging from 1.2 V to 5.5 V, without the need for a direction pin. It features an enable (EN) input that allows the translator switch to be turned on or off, enabling or disabling the connection between the two I2C/SMBus ports. This functionality is crucial in mixed-mode I2C applications where different voltage levels are used.
Key Specifications
| Parameter | Min | Max | Unit |
|---|---|---|---|
| Input/Output Voltage (SCL1, SDA1, SCL2, SDA2) | 0 | 5.5 | V |
| Reference Voltage (VREF1) | 1.2 | 3.3 | V |
| Reference Voltage (VREF2) | 1.8 | 5.5 | V |
| Enable Input Voltage (EN) | 0 | 5.5 | V |
| Pass Switch Current (IPASS) | - | 64 | mA |
| Operating Ambient Temperature (TA) | -40 | 85 | °C |
| Junction-to-Ambient Thermal Resistance (RθJA) | - | 254.1 | °C/W |
Key Features
- 2-bit bidirectional translator for SDA and SCL lines in mixed-mode I2C applications.
- I2C and SMBus compatible.
- Lockup-free operation when EN is low.
- Flow-through pinout for ease of PCB trace routing.
- High ESD protection: 2000-V Human-body model and 1000-V Charged-device model.
- Low ON-state resistance (RON) for minimal propagation delay.
- Ability to isolate a 400-kHz bus from a 100-kHz bus by controlling the EN pin.
Applications
- Servers and data centers.
- Routers and telecom switching equipment.
- Personal computers.
- Industrial automation systems.
- I2C, SMBus, PMBus, MDIO, UART, low-speed SDIO, GPIO, and other two-signal interfaces.
Q & A
- What is the PCA9306DCTRG4 used for?
The PCA9306DCTRG4 is used as a dual bidirectional I2C and SMBus voltage-level translator, enabling communication between devices operating at different voltage levels. - What are the voltage translation ranges for VREF1 and VREF2?
VREF1 supports 1.2 V to 3.3 V, and VREF2 supports 1.8 V to 5.5 V. - How does the enable (EN) input function?
The EN input turns the translator switch on or off, allowing or disabling the connection between the two I2C/SMBus ports. - What is the maximum operating frequency of the PCA9306DCTRG4?
The device supports up to 400 kHz operating frequency. - What kind of ESD protection does the PCA9306DCTRG4 offer?
The device offers ESD protection exceeding 2000-V Human-body model and 1000-V Charged-device model. - What are the common applications of the PCA9306DCTRG4?
Common applications include servers, routers, personal computers, and industrial automation systems. - What does the 'G4' suffix in PCA9306DCTRG4 indicate?
The 'G4' suffix indicates that the device is RoHS compliant and lead-free. - What is the thermal operating range of the PCA9306DCTRG4?
The device operates within an ambient temperature range of -40°C to 85°C. - How does the PCA9306DCTRG4 handle different bus frequencies?
The device can isolate a 400-kHz bus from a 100-kHz bus by controlling the EN pin. - What is the significance of the flow-through pinout in the PCA9306DCTRG4?
The flow-through pinout simplifies PCB trace routing.
