Overview
The PCA9535ECDTR2G, produced by onsemi, is a 16-bit I2C and SMBus low-power I/O expander. This device is designed to provide general-purpose remote I/O expansion for most microcontroller families via the I2C interface. It operates within a voltage range of 2.3 V to 5.5 V, making it versatile for various applications. The PCA9535ECDTR2G is known for its low standby-current consumption, high-current drive capability, and robust ESD protection, making it suitable for a wide range of electronic systems.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| VCC Operating Voltage | Range of supply voltage | 2.3 V to 5.5 V |
| Standby Current | Maximum current in standby mode | 1 μA |
| I2C Clock Frequency | Maximum frequency of the I2C clock | 400 kHz |
| ESD Protection | Human-body model and charged-device model | 2000 V (HBM), 1000 V (CDM) |
| Output Current | Maximum current per I/O and total device current | 25 mA per I/O, 200 mA total |
| Addressing | Number of devices that can share the same I2C bus | Up to eight devices using three hardware address pins (A0, A1, A2) |
| Interrupt Output | Type of interrupt output | Open-drain active-low interrupt output |
Key Features
- Low Power Consumption: Low standby-current consumption of 1 μA max.
- I2C Interface: Supports I2C and SMBus protocols with a clock frequency up to 400 kHz.
- High-Current Drive Capability: Latched outputs with high-current drive capability for directly driving LEDs.
- ESD Protection: Exceeds JESD 22 – 2000-V Human-body model and 1000-V Charged-device model.
- Addressing Flexibility: Three hardware address pins allow up to eight devices to share the same I2C bus or SMBus.
- Interrupt Functionality: Open-drain active-low interrupt output indicates changes in input states.
- Polarity Inversion: Polarity inversion register allows for active-high or active-low operation.
Applications
The PCA9535ECDTR2G is suitable for a variety of applications, including:
- Industrial Automation: Expanding I/O capabilities in industrial control systems.
- Consumer Electronics: Enhancing I/O functionality in consumer devices such as TVs, set-top boxes, and gaming consoles.
- Medical Devices: Providing additional I/O ports in medical equipment while maintaining low power consumption.
- Automotive Systems: Expanding I/O capabilities in automotive control units and infotainment systems.
Q & A
- What is the operating voltage range of the PCA9535ECDTR2G?
The PCA9535ECDTR2G operates within a voltage range of 2.3 V to 5.5 V.
- What is the maximum standby current of the PCA9535ECDTR2G?
The maximum standby current is 1 μA.
- What is the maximum I2C clock frequency supported by the PCA9535ECDTR2G?
The maximum I2C clock frequency is 400 kHz.
- How many devices can share the same I2C bus using the PCA9535ECDTR2G?
Up to eight devices can share the same I2C bus using three hardware address pins (A0, A1, A2).
- What type of interrupt output does the PCA9535ECDTR2G have?
The PCA9535ECDTR2G has an open-drain active-low interrupt output.
- What is the maximum current per I/O and total device current for the PCA9535ECDTR2G?
The maximum current per I/O is 25 mA, and the total device current is 200 mA.
- Does the PCA9535ECDTR2G have ESD protection?
Yes, it exceeds JESD 22 – 2000-V Human-body model and 1000-V Charged-device model.
- Can the PCA9535ECDTR2G drive LEDs directly?
Yes, it has latched outputs with high-current drive capability for directly driving LEDs.
- How does the PCA9535ECDTR2G handle polarity inversion?
The PCA9535ECDTR2G has a polarity inversion register that allows for active-high or active-low operation.
- What are some common applications of the PCA9535ECDTR2G?
Common applications include industrial automation, consumer electronics, medical devices, and automotive systems.
