Overview
The PCA9306DCUR, 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 domains without the need for a direction pin. It operates with a low-voltage reference supply (VREF1) ranging from 1.2 V to 3.3 V and a high-voltage reference supply (VREF2) ranging from 1.8 V to 5.5 V. The PCA9306 is particularly useful in mixed-mode I2C applications, supporting both standard-mode and fast-mode I2C devices as well as multiple controllers.
Key Specifications
| Parameter | Description |
|---|---|
| Package | VSSOP (8 pins), SSOP (8 pins), X2SON (8 pins), DSBGA (8 pins) |
| 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 |
| Maximum Propagation Delay | Less than 1.5 ns |
| ON-state Resistance (RON) | Low, approximately 3.5 Ω |
| ESD Protection | 2000-V Human-body model, 1000-V Charged-device model |
| Latch-up Performance | Exceeds 100 mA per JESD 78, class II |
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 the use of a direction pin
- 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 printed-circuit-board trace routing
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 PCA9306DCUR used for?
The PCA9306DCUR is a dual bidirectional I2C and SMBus voltage-level translator used for voltage translation between different voltage domains 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 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 (RON) of the PCA9306?
The ON-state resistance is approximately 3.5 Ω.
- What are the ESD protection levels of 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?
The PCA9306 is used in servers, routers, personal computers, industrial automation, and other applications involving I2C, SMBus, and similar interfaces.
- What package options are available for the PCA9306?
The PCA9306 is available in VSSOP, SSOP, X2SON, and DSBGA packages.
- What is the operating temperature range of the PCA9306?
The operating temperature range is -40°C to 85°C.
