Overview
The PCA9306DQER, produced by Texas Instruments, is a dual bidirectional I2C and SMBus voltage-level translator. This device features an enable (EN) input and operates without the need for a direction pin. It supports voltage-level translation between various voltage levels, ranging from 1.2 V to 5 V, making it versatile for mixed-mode I2C applications. The PCA9306DQER is designed to minimize signal distortion with low ON-state resistance and is compatible with both I2C and SMBus protocols. It is packaged in an 8-pin X2SON package and is operational over a temperature range of -40°C to 85°C.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | 8-Pin X2SON | |
| Operating Temperature Range | -40 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 | < 1.5 ns | ns |
| ON-state Resistance | 3.5 Ω | Ω |
| ESD Protection | 2000 V (Human-body model), 1000 V (Charged-device model) |
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
- Bidirectional voltage translation without the use of 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
- Routers (telecom switching equipment)
- Personal Computers
- Industrial Automation
- Remote board insertion to backplane with I2C lines
Q & A
- What is the PCA9306DQER used for?
The PCA9306DQER is a dual bidirectional I2C and SMBus voltage-level translator used for voltage-level translation 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 PCA9306DQER?
The maximum propagation delay is less than 1.5 ns.
- Does the PCA9306DQER require a direction pin for voltage translation?
No, the PCA9306DQER does not require a direction pin for voltage translation.
- What is the ON-state resistance of the PCA9306DQER?
The ON-state resistance is 3.5 Ω.
- What are the ESD protection levels for the PCA9306DQER?
The ESD protection levels are 2000 V (Human-body model) and 1000 V (Charged-device model).
- What are some common applications of the PCA9306DQER?
Common applications include I2C, SMBus, PMBus, MDIO, UART, low-speed SDIO, GPIO, servers, routers, personal computers, and industrial automation.
- How does the PCA9306DQER handle different bus frequencies?
The PCA9306DQER can isolate a 400-kHz bus from a 100-kHz bus by controlling the EN pin to disconnect the slower bus during fast-mode communication.
- What is the package type and pin count of the PCA9306DQER?
The PCA9306DQER is packaged in an 8-pin X2SON package.
- What is the operating temperature range of the PCA9306DQER?
The operating temperature range is -40°C to 85°C.
