Overview
The PCAL6408AHKX is an 8-bit I2C controlled GPIO expander designed by NXP USA Inc. for high-reliability applications. This component provides remote I/O expansion for most microcontroller families via the I2C-bus interface, making it an ideal solution when additional I/Os are needed while minimizing interconnections. It is particularly useful in mixed signal environments where communication between incompatible I/O voltages is required, thanks to its built-in level shifting feature. The PCAL6408AHKX operates within a wide voltage range of 1.65V to 5.5V, making it compatible with next-generation low-voltage microprocessors and microcontrollers.
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer | NXP USA Inc. |
| Part Number | PCAL6408AHKX |
| Number of I/O | 8 |
| Interface | I²C, SMBus |
| Interrupt Output | Yes |
| Output Type | Open Drain, Push-Pull |
| Current - Output Source/Sink | 10mA, 25mA |
| Clock Frequency | 400 kHz |
| Voltage - Supply | 1.65V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C |
| Mounting Type | Surface Mount |
| Package/Case | 16-pin X-FQFN (Flattop Quad-Flat No-Lead) |
Key Features
- High-reliability design with fault-tolerant logic
- I2C bus interface master-slave support
- Pulse-free power-on reset
- Programmable interrupt output delay time
- No damage by over-voltage or over-current
- Data retention down to 1.8V supply
- Input hysteresis for noise immunity
- Pulse-free power-off
- Smart card interface with clock stretching
- Low electromagnetic radiation
- Programmable pull-up and pull-down resistors
- Output port configuration: bank selectable push-pull or open-drain output stages
Applications
- Industrial automation
- Consumer electronics
- Medical devices
- Home automation
- IoT devices
- Gaming peripherals
- Embedded systems
- Automotive applications
- Sensor interfaces
- LED lighting control
Q & A
- What is the PCAL6408AHKX?
The PCAL6408AHKX is an 8-bit I2C controlled GPIO expander designed for high-reliability applications.
- Who is the manufacturer of the PCAL6408AHKX?
The manufacturer is NXP USA Inc.
- What is the interface type of the PCAL6408AHKX?
The interface type is I²C and SMBus.
- What is the voltage range of the PCAL6408AHKX?
The voltage range is from 1.65V to 5.5V.
- What is the package type of the PCAL6408AHKX?
The package type is a 16-pin X-FQFN (Flattop Quad-Flat No-Lead).
- What are some key features of the PCAL6408AHKX?
Key features include high-reliability design, pulse-free power-on reset, programmable interrupt output delay time, and programmable pull-up and pull-down resistors.
- In what applications can the PCAL6408AHKX be used?
It can be used in industrial automation, consumer electronics, medical devices, home automation, IoT devices, gaming peripherals, embedded systems, automotive applications, sensor interfaces, and LED lighting control.
- Does the PCAL6408AHKX have built-in level shifting?
Yes, it has a built-in level shifting feature for communication between incompatible I/O voltages.
- What is the maximum clock frequency of the I2C interface?
The maximum clock frequency is 400 kHz.
- Does the PCAL6408AHKX have ESD protection?
Yes, it has ESD protection that exceeds JESD 22 standards.
