Overview
The PCA9507DP,118, manufactured by NXP USA Inc., is a 2-wire serial bus extender designed to enhance the reliability and range of I2C, SMBus, and DDC bus applications. This component provides a level shift between 3.3 V to 5 V, 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 data (SDA) and clock (SCL) lines. The PCA9507 is particularly useful in applications requiring long cable runs or heavy capacitive loads, such as in HDMI DDC version 1.3 compliance.
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 |
| Operating Temperature Min | -40°C |
| Operating Temperature Max | 85°C |
Key Features
- Bidirectional buffering for both data (SDA) and clock (SCL) lines
- Rise time accelerator on port A to drive loads up to 1400 pF or distances of 18 meters
- Static level offset on port B
- Voltage level translation from 2.7 V to 5.5 V
- 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 I/Os even when the device is unpowered
Applications
The PCA9507DP,118 is suitable for various applications requiring extended I2C, SMBus, or DDC bus lengths, such as:
- HDMI DDC version 1.3 compliance
- Industrial automation systems with long cable runs
- Automotive systems requiring robust and reliable bus communication
- Consumer electronics with complex bus topologies
- Any system needing to isolate bus capacitance and extend the bus length
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 length of I2C, SMBus, and DDC bus applications up to 18 meters.
- What is the operating voltage range of the PCA9507DP,118?
The operating voltage range is from 2.7 V to 5.5 V.
- What is the maximum clock frequency supported by the PCA9507DP,118?
The maximum clock frequency is 400 kHz.
- Can multiple PCA9507DP,118 devices be connected in series?
Yes, multiple devices can be connected in series, port A to port B, without any build-up in offset voltage.
- What is the purpose of the rise time accelerator on port A?
The rise time accelerator on port A enables the device to drive a load up to 1400 pF or a distance of 18 meters.
- Are the I/Os of the PCA9507DP,118 overvoltage tolerant?
Yes, the I/Os are 5 V tolerant even when the device is unpowered.
- What is the operating temperature range of the PCA9507DP,118?
The operating temperature range is from -40°C to 85°C.
- Can the PCA9507DP,118 be used in HDMI DDC applications?
Yes, it is designed to meet HDMI DDC version 1.3 distance specifications.
- How does the PCA9507DP,118 handle bus capacitance?
The device isolates bus capacitance, allowing it to meet the distance specifications of various bus protocols.
- What is the package style of the PCA9507DP,118?
The package style is TSSOP-8.
