Overview
The NXP PCA9507DP,118 is a 2-wire serial bus extender designed to enhance the reliability and range of I2C-bus, SMBus, and HDMI DDC applications. This device provides a 3.3 V to 5 V level shift, allowing for bus extensions of up to 18 meters. It retains all operating modes and features of the I2C-bus system during level shifts and offers bidirectional buffering for both the data (SDA) and clock (SCL) lines. The PCA9507 is particularly useful in applications requiring long cable runs or heavy capacitive loads, making it an ideal solution for various industrial, automotive, and consumer electronics systems.
Key Specifications
| Parameter | Value |
|---|---|
| Interface Type | I2C/SMBus |
| No of Channels | 2 |
| Clock Frequency-Max | 400 kHz |
| Supply Voltage-Nom | 2.7 V to 5.5 V |
| Supply Current | 1.5 mA |
| Package Style | TSSOP-8 |
| Mounting Method | Surface Mount |
| Bus Capacitance on Port A | Up to 1400 pF |
| Bus Capacitance on Port B | Up to 400 pF |
| Maximum Bus Extension | Up to 18 meters |
Key Features
- 2-channel, bidirectional buffer isolates capacitance allowing up to 1400 pF on port A and 400 pF on port B.
- Exceeds 18 meters (above the maximum distance for HDMI DDC) for reliable bus extension.
- Rise time accelerator and normal I/O on port A.
- Static level offset on port B.
- Voltage level translation from 2.7 V to 5.5 V.
- Upgrade replacement over PCA9517 for cable applications.
- All I/Os are overvoltage tolerant to 5.5 V even when the device is unpowered.
- Power-up circuit keeps output drivers turned off until VCC(A) and VCC(B) rise above 2.7 V.
Applications
The PCA9507DP,118 is suitable for a variety of applications, including:
- HDMI DDC (Display Data Channel) extensions.
- I2C-bus and SMBus systems requiring long cable runs or heavy capacitive loads.
- Industrial automation and control systems.
- Automotive electronics.
- Consumer electronics such as TVs, monitors, and other display devices.
Q & A
- What is the primary function of the PCA9507DP,118?
The PCA9507DP,118 is a 2-wire serial bus extender designed to extend the range of I2C-bus, SMBus, and HDMI DDC applications. - What is the maximum bus extension provided by the PCA9507DP,118?
The device allows for bus extensions of up to 18 meters. - What is the clock frequency range of the PCA9507DP,118?
The clock frequency can go up to 400 kHz. - What is the supply voltage range for the PCA9507DP,118?
The supply voltage range is from 2.7 V to 5.5 V. - What is the package style of the PCA9507DP,118?
The package style is TSSOP-8. - Is the PCA9507DP,118 overvoltage tolerant?
Yes, all I/Os are overvoltage tolerant to 5.5 V even when the device is unpowered. - How does the rise time accelerator function on the PCA9507DP,118?
The rise time accelerator on port A enables the device to drive a long cable or a heavier capacitive load by accelerating the rise time of the signal. - Can multiple PCA9507s be connected in series?
Yes, multiple PCA9507s can be connected in series, port A to port B, without any build-up in offset voltage. - What is the purpose of the EN pin on the PCA9507DP,118?
The EN pin can be used to turn the drivers on and off under system control. - What are some common applications of the PCA9507DP,118?
Common applications include HDMI DDC extensions, I2C-bus and SMBus systems, industrial automation, automotive electronics, and consumer electronics.
