Overview
The PCAL6408AHK is an 8-bit general-purpose I/O expander produced by NXP USA Inc. This component is designed to provide remote I/O expansion for most microcontroller families via the I²C-bus interface. It is particularly useful in applications where additional I/O ports are needed without increasing the microcontroller's pin count. The PCAL6408AHK offers bidirectional voltage level translation, making it versatile for use in various voltage environments.
Key Specifications
| Product Attribute | Attribute Value |
|---|---|
| Manufacturer | NXP Semiconductors |
| Package | Bulk |
| Base Product Number | PCAL6 |
| RoHS Status | Compliant |
| Lead-Free Status | Yes |
| Moisture Sensitivity Level (MSL) | 1 / Unlimited |
| ECCN | EAR99 |
| HTSUS | 8542.39.0001 |
| Supply Voltages | VDD(I2C-bus) and VDD(P) |
| Interface | I²C-bus/SMBus |
| Number of I/Os | 8-bit |
Key Features
- Bidirectional Voltage Level Translation: The PCAL6408AHK supports voltage level translation between the I²C-bus and the port side, allowing it to operate at different voltage levels.
- Programmable Output Drive Strength: The component allows for programmable output drive strength, enhancing its flexibility in various applications.
- Latchable Inputs: Inputs can be latched, providing stability and reliability in input data.
- Programmable Pull-up/Pull-down Resistors: Eliminates the need for discrete components by integrating programmable pull-up and pull-down resistors.
- Maskable Interrupt and Interrupt Status Register: Supports maskable interrupts and an interrupt status register for efficient interrupt handling.
- Programmable Open-Drain or Push-Pull Outputs: Outputs can be configured as either open-drain or push-pull, offering versatility in output configurations.
- Polarity Inversion Register: Allows the polarity of the input port to be inverted, reducing the need for external logic gates.
Applications
- Automotive Systems: Suitable for use in automotive systems where additional I/O ports are required without increasing the microcontroller's pin count.
- Industrial Automation: Used in industrial automation to expand the I/O capabilities of microcontrollers.
- Consumer Electronics: Applied in consumer electronics to provide additional I/O ports for various functions.
- Medical Devices: Utilized in medical devices to enhance the I/O capabilities while maintaining a compact design.
Q & A
- What is the primary function of the PCAL6408AHK?
The primary function of the PCAL6408AHK is to provide remote I/O expansion for most microcontroller families via the I²C-bus interface.
- What are the supply voltages for the PCAL6408AHK?
The PCAL6408AHK has two supply voltages: VDD(I2C-bus) for the interface at the controller side and VDD(P) for the core circuits and Port P.
- Is the PCAL6408AHK RoHS compliant?
- What is the moisture sensitivity level (MSL) of the PCAL6408AHK?
The moisture sensitivity level (MSL) of the PCAL6408AHK is 1 / Unlimited.
- Can the output drive strength of the PCAL6408AHK be programmed?
- Does the PCAL6408AHK support latchable inputs?
- What types of outputs can be configured on the PCAL6408AHK?
The outputs on the PCAL6408AHK can be configured as either open-drain or push-pull.
- How does the PCAL6408AHK handle interrupts?
The PCAL6408AHK supports maskable interrupts and has an interrupt status register for efficient interrupt handling.
- Can the polarity of the input port be inverted on the PCAL6408AHK?
- What is the typical application of the PCAL6408AHK in automotive systems?
In automotive systems, the PCAL6408AHK is used to expand the I/O capabilities of microcontrollers without increasing the pin count.
