Overview
The PCA9306DCTRE4, produced by Texas Instruments, is a dual bidirectional I2C and SMBus voltage-level translator. This device is designed to facilitate voltage translation between different voltage levels without the need for a direction pin. It operates with a low-voltage side reference supply voltage (VREF1) ranging from 1.2 V to 3.3 V and a high-voltage side reference supply voltage (VREF2) ranging from 1.8 V to 5.5 V. The PCA9306 device is particularly useful in mixed-mode I2C applications, allowing for seamless communication between devices operating at different voltage levels.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | SSOP (8 pins) | |
| Operating Temperature Range | -40 to 85 | °C |
| VREF1 DC Reference Voltage Range | 1.2 to 3.3 | V |
| VREF2 DC Reference Voltage Range | 1.8 to 5.5 | V |
| Input/Output Voltage Range | 0 to 5.5 | V |
| Maximum Junction Temperature | 125 | °C |
| Storage Temperature Range | -65 to 150 | °C |
| Propagation Delay (tPLH, tPHL) | < 1.5 ns (max) | ns |
| ON-State Resistance (RON) | 3.5 Ω (max) | Ω |
| ESD Protection | 2000 V (Human-body model), 1000 V (Charged-device model) | V |
Key Features
- 2-bit bidirectional translator for SDA and SCL lines in mixed-mode I2C applications.
- I2C and SMBus compatible.
- Less than 1.5-ns maximum propagation delay to accommodate standard-mode and fast-mode I2C devices and multiple controllers.
- Allows voltage-level translation between various voltage levels (e.g., 1.2 V to 5 V) without a direction pin.
- Low 3.5-Ω ON-state resistance between input and output ports, minimizing signal distortion.
- Open-drain I2C I/O ports (SCL1, SDA1, SCL2, and SDA2).
- 5-V tolerant I2C I/O ports to support mixed-mode signal operation.
- High-impedance SCL1, SDA1, SCL2, and SDA2 pins when EN is low.
- Lockup-free operation for isolation when EN is low.
- Flow-through pinout for ease of printed-circuit-board trace routing.
- Latch-up performance exceeds 100 mA per JESD 78, class II.
- ESD protection exceeds JESD 22 standards.
Applications
- Personal Computers
- Servers
- Routers and Telecom Switching Equipment
- Industrial Automation
- Low-Speed SDIO, GPIO, and Other Two-Signal Interfaces
The PCA9306 is particularly useful in scenarios where devices operating at different voltage levels need to communicate, such as in mixed-mode I2C applications and in systems requiring isolation between buses operating at different frequencies.
Q & A
- What is the PCA9306DCTRE4 used for?
The PCA9306DCTRE4 is a dual bidirectional I2C and SMBus voltage-level translator used to facilitate communication between devices operating at different voltage levels.
- What are the operating voltage ranges for VREF1 and VREF2?
VREF1 operates from 1.2 V to 3.3 V, and VREF2 operates from 1.8 V to 5.5 V.
- What is the maximum propagation delay of the PCA9306?
The maximum propagation delay is less than 1.5 ns.
- Does the PCA9306 require a direction pin for voltage translation?
No, the PCA9306 does not require a direction pin for voltage translation.
- What is the ON-state resistance of the PCA9306?
The ON-state resistance (RON) is 3.5 Ω (max).
- Is the PCA9306 compatible with I2C and SMBus protocols?
- What is the purpose of the EN pin on the PCA9306?
The EN pin is used to enable or disable the translator switch, allowing for isolation between buses if needed.
- What are the ESD protection levels for the PCA9306?
The PCA9306 has ESD protection exceeding 2000 V (Human-body model) and 1000 V (Charged-device model).
- What are some common applications of the PCA9306?
- What is the operating temperature range of the PCA9306?
- What is the storage temperature range for the PCA9306?
