Overview
The PCAL6524EVJ, produced by NXP USA Inc., is a highly integrated 24-bit general purpose I/O expander designed to provide remote I/O expansion for various microcontroller families. This device utilizes the Fast-mode Plus (Fm+) I2C-bus interface, enabling communication at speeds up to 1 MHz. The PCAL6524EVJ features ultra-low voltage translation, allowing it to connect directly to microcontrollers operating at voltages as low as 0.8 V, while the I/O ports can operate at voltages ranging from 1.65 V to 5.5 V. This makes it particularly useful in mixed power supply systems and battery-powered mobile applications where interfacing with sensors, push buttons, and keypads is necessary.
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer | NXP USA Inc. |
| Part Number | PCAL6524EVJ |
| Package | 36-VFBGA |
| Number of I/Os | 24 |
| Operating Temperature | -40°C to 85°C |
| Supply Voltage | 1.65 V to 5.5 V |
| Interface | Fast-mode Plus (Fm+) I2C-bus |
| Output Type | Open Drain, Push-Pull |
| Mounting Type | Surface Mount |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Key Features
- Ultra-low Voltage Translation: Allows direct connection to microcontrollers operating down to 0.8 V and I/O ports operating at 1.65 V to 5.5 V.
- Agile I/O: Features include programmable output drive strength, latchable inputs, pull-up/pull-down enable, and interrupt mask.
- Flexible Output Configuration: Bank selectable or pin selectable push-pull or open-drain output stages.
- Interrupt Status: Read-only register identifies the source of an interrupt.
- Bit-wise I/O Programming: Includes features such as input latch, pull-up/pull-down enable, and pull-up/pull-down selection.
Applications
- Battery-Powered Mobile Applications: Ideal for interfacing with sensors, push buttons, and keypads in mobile devices.
- Mixed Power Supply Systems: Enables seamless communication between microcontrollers and peripherals operating at different voltage levels.
- Industrial Automation: Useful in systems requiring remote I/O expansion and flexible voltage translation.
- Consumer Electronics: Suitable for applications such as smart home devices, wearables, and other consumer electronics requiring I/O expansion.
Q & A
- What is the PCAL6524EVJ used for?
The PCAL6524EVJ is a 24-bit general purpose I/O expander used to provide remote I/O expansion for microcontroller families via the Fast-mode Plus (Fm+) I2C-bus interface.
- What is the operating temperature range of the PCAL6524EVJ?
The operating temperature range is -40°C to 85°C.
- What are the supply voltage ranges for the PCAL6524EVJ?
The supply voltage ranges are 1.65 V to 5.5 V for the I/O ports and 0.8 V to 5.5 V for the interface side.
- What types of output configurations are available on the PCAL6524EVJ?
The output configurations include bank selectable or pin selectable push-pull or open-drain output stages.
- Does the PCAL6524EVJ support interrupt functions?
Yes, it includes an interrupt status register to identify the source of an interrupt and an interrupt mask to prevent unnecessary interrupts.
- What is the moisture sensitivity level (MSL) of the PCAL6524EVJ?
The MSL is 1 (Unlimited), indicating it is not susceptible to moisture-induced damage during storage and soldering.
- What package type does the PCAL6524EVJ come in?
The PCAL6524EVJ comes in a 36-VFBGA package.
- Is the PCAL6524EVJ suitable for mixed power supply systems?
Yes, it features bidirectional voltage level translation, making it suitable for mixed power supply systems.
- What are some common applications of the PCAL6524EVJ?
Common applications include battery-powered mobile devices, industrial automation, and consumer electronics requiring I/O expansion.
- What is the maximum I2C-bus speed supported by the PCAL6524EVJ?
The maximum I2C-bus speed supported is up to 1 MHz.
