Overview
The PCA9509GM,125 from NXP USA Inc. is a level translating I2C-bus/SMBus repeater designed to facilitate communication between low-voltage and standard-voltage I2C-bus or SMBus systems. This component enables seamless integration of processors operating at lower voltages with standard I2C-bus or SMBus interfaces, ensuring no degradation in system performance. The PCA9509GM,125 is particularly useful in mixed-voltage systems where compatibility between different voltage levels is crucial.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCC(A) (Port A Supply Voltage) | 1.35 | - | - | V |
| VCC(B) (Port B Supply Voltage) | - | - | 5.5 | V |
| Supply Current (Port A, static HIGH) | 0.25 | 0.45 | 0.9 | mA |
| Supply Current (Port A, static LOW) | 1.25 | 3.0 | 5 | mA |
| Supply Current (Port B, static HIGH) | 0.5 | 0.9 | 1.1 | mA |
| Operating Temperature | -40 | - | 85 | °C |
| Package Type | XQFN8 | - | - | - |
| Package Dimensions | 1.6 x 1.6 x 0.5 mm | - | - | - |
Key Features
- Level Translation: Enables communication between low-voltage and standard-voltage I2C-bus or SMBus systems without performance degradation.
- Bidirectional Open-Drain Buffers: Supports up-translation and down-translation between the two buses.
- Over-Voltage Tolerance: Port B I/Os are tolerant to 5.5 V even when the device is unpowered.
- Power-Up Circuitry: Keeps output drivers turned off until VCC(B) is above 2.5 V.
- Low Power Consumption: Optimized for low power supply currents on both ports.
Applications
- Mixed-Voltage Systems: Ideal for systems where processors operate at different voltage levels.
- Industrial Automation: Used in industrial control systems that require communication between devices at different voltage levels.
- Consumer Electronics: Suitable for various consumer electronic devices that need to interface with different voltage-level components.
- Automotive Systems: Used in automotive systems for reliable communication between different modules operating at various voltage levels.
Q & A
- What is the primary function of the PCA9509GM,125? The PCA9509GM,125 is a level translating I2C-bus/SMBus repeater that enables communication between low-voltage and standard-voltage I2C-bus or SMBus systems.
- What is the minimum supply voltage for Port A? The minimum supply voltage for Port A (VCC(A)) is 1.35 V.
- Is the PCA9509GM,125 over-voltage tolerant? Yes, the Port B I/Os are over-voltage tolerant up to 5.5 V even when the device is unpowered.
- What is the operating temperature range of the PCA9509GM,125? The operating temperature range is from -40°C to 85°C.
- What package type is the PCA9509GM,125 available in? The PCA9509GM,125 is available in an XQFN8 package.
- How does the power-up circuitry work? The power-up circuitry keeps the output drivers turned off until VCC(B) is above 2.5 V.
- Can the PCA9509GM,125 handle bidirectional communication? Yes, it supports bidirectional open-drain buffers for up-translation and down-translation.
- What are some common applications of the PCA9509GM,125? Common applications include mixed-voltage systems, industrial automation, consumer electronics, and automotive systems.
- How does the PCA9509GM,125 manage power consumption? It is optimized for low power supply currents on both ports.
- Is the PCA9509GM,125 RoHS compliant? Yes, the PCA9509GM,125 is RoHS compliant.
