Overview
The PCA9306DCUTG4, produced by Texas Instruments, is a dual bidirectional I2C and SMBus voltage-level translator. This device features an enable (EN) input and operates within a voltage range of 1.2-V to 3.3-V for VREF1 and 1.8-V to 5.5-V for VREF2. It allows bidirectional voltage translations between 1.2 V and 5 V without the need for a direction pin. The low ON-state resistance of the switch ensures minimal propagation delay, enabling efficient data flow between ports when the EN pin is high. When the EN pin is low, the translator switch is off, and a high-impedance state exists between the ports, which can be used to isolate buses operating at different frequencies.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Package Type | VSSOP (8 pins) | 2.30 mm x 2.00 mm |
| Operating Temperature Range | -40°C to 85°C | |
| VREF1 Voltage Range | 1.2 V to 3.3 V | |
| VREF2 Voltage Range | 1.8 V to 5.5 V | |
| Propagation Delay | Less than 1.5 ns | |
| ON-state Resistance (RON) | 3.5 Ω | |
| ESD Protection | 2000-V Human-body model, 1000-V Charged-device model | |
| Pins | EN, GND, SCL1, SDA1, SCL2, SDA2, VREF1, VREF2 |
Key Features
- 2-Bit bidirectional translator for SDA and SCL lines in mixed-mode I2C applications
- I2C and SMBus compatible
- 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)
- 5-V tolerant I2C I/O ports for 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 PCB trace routing
- Latch-up performance exceeds 100 mA per JESD 78, class II
- ESD protection exceeds JESD 22 standards
Applications
- I2C, SMBus, PMBus, MDIO, UART, low-speed SDIO, GPIO, and other two-signal interfaces
- Servers
- Routers (telecom switching equipment)
- Personal Computers
- Industrial Automation
- Remote board insertion to backplane with I2C lines
Q & A
- What is the PCA9306DCUTG4 used for?
The PCA9306DCUTG4 is a dual bidirectional I2C and SMBus voltage-level translator used for voltage translation between different voltage levels in mixed-mode I2C applications.
- What is the operating voltage range 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.
- 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 maximum propagation delay of the PCA9306?
The maximum propagation delay is less than 1.5 ns.
- What is the ON-state resistance (RON) of the PCA9306?
The ON-state resistance is 3.5 Ω.
- 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.
- Can the PCA9306 isolate buses operating at different frequencies?
- What are some common applications of the PCA9306?
- What is the package type and size of the PCA9306DCUTG4?
The package type is VSSOP (8 pins) with a size of 2.30 mm x 2.00 mm.
- What is the operating temperature range of the PCA9306?
