Overview
The PCA9306DCTTG4, 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, ranging from 1.2 V to 5.5 V, without the need for a direction pin. It features an enable (EN) input that allows for the control of the translator switch, enabling or disabling the connection between the two I2C/SMBus ports. The PCA9306 is operational from 1.2-V to 3.3-V VREF1 and 1.8-V to 5.5-V VREF2, making it versatile for various mixed-mode I2C applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package Type | SSOP (8 pins), VSSOP (8 pins), X2SON (8 pins), DSBGA (8 pins) | - |
| Operating Temperature Range | -40 to 85 | °C |
| VREF1 Voltage Range | 1.2 V to 3.3 V | V |
| VREF2 Voltage Range | 1.8 V to 5.5 V | V |
| Propagation Delay (tPLH, tPHL) | 0 to 1.2 ns | ns |
| ON-state Resistance (RON) | 3.5 Ω | 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.
- Bidirectional voltage translation without a direction pin.
- Low 3.5-Ω ON-state resistance between input and output ports.
- 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 for EN = low.
- Lockup-free operation for isolation when EN = 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.
Applications
- I2C, SMBus, PMBus, MDIO, UART, low-speed SDIO, GPIO, and other two-signal interfaces.
- Servers and routers (telecom switching equipment).
- Personal computers.
- Industrial automation.
- Remote board insertion to backplane with I2C lines.
Q & A
- What is the PCA9306DCTTG4 used for?
The PCA9306DCTTG4 is used as a dual bidirectional I2C and SMBus voltage-level translator, facilitating communication between different voltage levels in mixed-mode I2C applications.
- 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 PCA9306DCTTG4?
The maximum propagation delay is less than 1.5 ns.
- Does the PCA9306DCTTG4 require a direction pin for voltage translation?
No, it does not require a direction pin for voltage translation.
- What is the ON-state resistance of the PCA9306DCTTG4?
The ON-state resistance is 3.5 Ω.
- What kind of ESD protection does the PCA9306DCTTG4 offer?
The device offers ESD protection exceeding 2000 V (Human-body model) and 1000 V (Charged-device model).
- Can the PCA9306DCTTG4 be used to isolate different I2C buses?
- What are some common applications of the PCA9306DCTTG4?
- What is the package type of the PCA9306DCTTG4?
The device is available in SSOP (8 pins), VSSOP (8 pins), X2SON (8 pins), and DSBGA (8 pins) packages.
- What is the operating temperature range of the PCA9306DCTTG4?
The operating temperature range is from -40°C to 85°C.
