Overview
The PCA9507D,118 is a 2-wire serial bus extender produced by NXP USA Inc. This component is designed to provide reliable bus extension for DDC, I2C-bus, and SMBus applications. It allows for voltage level translation between 2.7 V to 5.5 V and supports bus extensions of up to 18 meters, making it suitable for various applications requiring long-distance signal transmission.
Key Specifications
| Parameter | Value |
|---|---|
| Interface Type | I2C/SMBus |
| No of Channels | 1 |
| Clock Frequency - Max | 400 kHz |
| Supply Voltage - Nom | 2.7 V to 5.5 V |
| Supply Current | 1.5 mA |
| Output Type | Open Drain |
| Operating Temp Range | -40°C to +85°C |
| Storage Temperature Range | -55°C to +125°C |
| Power Dissipation | 100 mW |
| Moisture Sensitivity Level | 1 |
| Package Style | SOIC-8 |
| Mounting Method | Surface Mount |
Key Features
- Bidirectional buffering for both data (SDA) and clock (SCL) lines, allowing for bus extension up to 18 meters.
- Rise time accelerator on port A to drive loads up to 1400 pF or distances of 18 meters, and 400 pF on port B.
- Voltage level translation from 2.7 V to 5.5 V.
- Upgrade replacement over PCA9517 for cable applications.
- I2C-bus, SMBus, and DDC-bus compatible.
- Active HIGH buffer enable input.
- Open-drain input/outputs.
- Lock-up free operation.
- Supports arbitration and clock stretching across the repeater.
- Accommodates Standard-mode and Fast-mode I2C-bus devices and multiple masters.
- Powered-off high-impedance I2C-bus pins.
- 5 V tolerant I2C-bus and enable pins.
Applications
The PCA9507D,118 is primarily used in applications requiring long-distance signal transmission over I2C, SMBus, or DDC buses. This includes:
- HDMI DDC (Display Data Channel) applications, where it helps meet the distance specifications of HDMI DDC version 1.3.
- Industrial control systems that require reliable and extended bus communication.
- Automotive systems where robust and long-distance signal transmission is necessary.
- Consumer electronics that need to extend the reach of I2C or SMBus signals.
Q & A
- What is the primary function of the PCA9507D,118?
The PCA9507D,118 is a 2-wire serial bus extender designed to extend the reach of I2C, SMBus, and DDC signals up to 18 meters.
- What are the supported voltage ranges for the PCA9507D,118?
The component supports supply voltage ranges from 2.7 V to 5.5 V for both port A and port B.
- What is the maximum clock frequency supported by the PCA9507D,118?
The maximum clock frequency supported is 400 kHz.
- What is the purpose of the rise time accelerator on port A?
The rise time accelerator on port A enables the bus to drive loads up to 1400 pF or distances of 18 meters, improving signal integrity over long distances.
- Is the PCA9507D,118 compatible with multiple I2C-bus masters?
- What is the operating temperature range of the PCA9507D,118?
The operating temperature range is -40°C to +85°C.
- Is the PCA9507D,118 5 V tolerant?
- How does the PCA9507D,118 handle bus capacitance?
The component isolates bus capacitance, allowing it to meet HDMI DDC version 1.3 distance specifications by providing bidirectional buffering.
- Can multiple PCA9507D,118 devices be connected in series?
- What is the package style of the PCA9507D,118?
The PCA9507D,118 comes in an SOIC-8 package.
- How does the PCA9507D,118 handle power-up and power-down states?
The device includes a power-up circuit that keeps the output drivers turned off until both VCC(A) and VCC(B) rise above 2.7 V, ensuring safe operation during power transitions.
