Overview
The PCAL6416AEVJ, produced by NXP USA Inc., is a 16-bit general-purpose I/O expander designed to provide remote I/O expansion for various microcontroller families through the I²C-bus interface. This device is particularly useful in applications where additional I/Os are required while minimizing interconnections. It features low-voltage translation, making it suitable for mixed signal environments where communication between different voltage levels is necessary.
Key Specifications
| Specification | Details |
|---|---|
| Number of I/Os | 16 bits |
| Interface | I²C-bus/SMBus |
| Supply Voltage Range | 1.65 V to 5.5 V (VDD(I2C-bus) and VDD(P)) |
| Operating Temperature | -40 °C to +85 °C |
| Interrupt Output | Open-drain interrupt (INT) |
| Reset Pin | Active LOW reset input |
| ESD Protection | Exceeds JESD 22 – 2000 V Human-Body Model, 1000 V Charged-Device Model |
| Package Options | TSSOP24, HWQFN24, VFBGA24, X2QFN24 (LGA) |
Key Features
- Low-voltage translating capability, allowing communication between different voltage levels.
- Bidirectional voltage level translation through VDD(I2C-bus) and VDD(P).
- Open-drain interrupt output (INT) to indicate input state changes.
- Active LOW reset input (RESET) for system initialization.
- No glitch on power-up and noise filter on SCL/SDA inputs.
- Latched outputs with 25 mA drive maximum capability for directly driving LEDs.
- ESD protection exceeding JESD 22 standards.
Applications
The PCAL6416AEVJ is suitable for a variety of applications, including:
- Battery-powered mobile devices for interfacing with sensors, push buttons, and keypads.
- Mixed signal environments where communication between incompatible I/O voltages is required.
- Systems requiring remote I/O expansion with minimal interconnections.
- Arduino and other microcontroller-based projects, especially with the use of evaluation boards like the PCAL6416AEV-ARD.
Q & A
- What is the primary function of the PCAL6416AEVJ?
The primary function is to provide remote I/O expansion for microcontroller families via the I²C-bus interface. - What is the voltage range for the PCAL6416AEVJ?
The supply voltage range is 1.65 V to 5.5 V, with separate voltages for the I²C-bus interface (VDD(I2C-bus)) and the core circuits and Port P (VDD(P)). - What types of packages are available for the PCAL6416AEVJ?
The device is available in TSSOP24, HWQFN24, VFBGA24, and X2QFN24 (LGA) packages. - Does the PCAL6416AEVJ have built-in ESD protection?
Yes, it exceeds JESD 22 – 2000 V Human-Body Model and 1000 V Charged-Device Model. - How does the interrupt output work on the PCAL6416AEVJ?
The open-drain interrupt output (INT) is activated when any input state differs from its corresponding Input Port register state, indicating a change to the system master. - What is the purpose of the RESET pin on the PCAL6416AEVJ?
The RESET pin is an active LOW reset input that initializes the device and resets the I²C-bus state machine without depowering the part. - Can the PCAL6416AEVJ drive LEDs directly?
Yes, the latched outputs have a maximum drive capability of 25 mA, which is sufficient for directly driving LEDs. - Is the PCAL6416AEVJ suitable for mixed signal environments?
Yes, it features bidirectional voltage level translation, making it suitable for mixed signal environments. - What evaluation board is available for testing the PCAL6416AEVJ?
The PCAL6416AEV-ARD evaluation board is available for easy testing and design of the PCAL6416A IC. - What is the operating temperature range of the PCAL6416AEVJ?
The operating temperature range is -40 °C to +85 °C.
