Overview
The PCAL6524HEAZ is a 24-bit general-purpose I/O expander produced by NXP USA Inc. It is designed to enable remote I/O expansion for most microcontroller families through the Fast-mode Plus (Fm+) I2C-bus interface. This device features ultra-low-voltage interface capabilities, allowing direct connection to microcontrollers operating down to 0.8 V. It supports bidirectional voltage level translation and includes various Agile I/O features such as programmable output drive strength, latchable inputs, and programmable pull-up/pull-down resistors.
Key Specifications
| Type | Parameter |
|---|---|
| Interface | I2C |
| Number of I/Os | 24 I/O |
| Voltage - Supply | 1.65V ~ 5.5V |
| Clock Frequency | 1 MHz |
| Operating Supply Voltage | 800 mV to 3.6 V |
| Operating Supply Current | 1.7 mA |
| Output Current | 25 mA |
| Maximum Sink Current per Bit | 50 mA |
| Operating Temperature | -40°C ~ 85°C |
| Package / Case | HUQFN-32/VFBGA36 |
Key Features
- Agile I/O Features: Programmable output drive strength, latchable inputs, programmable pull-up/pull-down resistors, maskable interrupt, interrupt status register, and programmable open-drain or push-pull outputs.
- Bidirectional Voltage Level Translation: Managed through VDD(I2C-bus) and VDD(P), allowing interface with devices at different voltage levels without external components.
- Interrupt Capabilities: Open-drain interrupt (INT) output activated by input state changes or pin edges, with various interrupt mask functions.
- High-Current Capability: Port P outputs have 25 mA sink capabilities, suitable for directly driving LEDs.
- Robust Performance: Latch-up performance exceeds 100 mA per JESD 78, Class II, and ESD protection exceeds JESD 22.
- Package Options: Available in HUQFN-32 and VFBGA36 packages for design flexibility.
Applications
The PCAL6524HEAZ is ideal for use in various applications, including consumer electronics, industrial automation, and IoT devices. Its ability to expand the number of available GPIO pins makes it particularly useful in systems requiring a large number of I/O connections. It simplifies circuit designs by offloading I/O tasks, leading to cost savings and faster time to market for products.
Q & A
- What is the PCAL6524HEAZ? The PCAL6524HEAZ is a 24-bit general-purpose I/O expander designed for remote I/O expansion via the Fast-mode Plus (Fm+) I2C-bus interface.
- What is the minimum operating voltage for the PCAL6524HEAZ? The minimum operating voltage is 800 mV.
- What is the maximum clock frequency of the PCAL6524HEAZ? The maximum clock frequency is 1 MHz.
- What are the package options for the PCAL6524HEAZ? The device is available in HUQFN-32 and VFBGA36 packages.
- Does the PCAL6524HEAZ support bidirectional voltage level translation? Yes, it supports bidirectional voltage level translation through VDD(I2C-bus) and VDD(P).
- What are the key Agile I/O features of the PCAL6524HEAZ? Programmable output drive strength, latchable inputs, programmable pull-up/pull-down resistors, maskable interrupt, interrupt status register, and programmable open-drain or push-pull outputs.
- How does the interrupt function work in the PCAL6524HEAZ? The open-drain interrupt (INT) output is activated by input state changes or pin edges, with various interrupt mask functions available.
- What is the maximum sink current per bit for the PCAL6524HEAZ? The maximum sink current per bit is 50 mA.
- What are the operating temperature ranges for the PCAL6524HEAZ? The operating temperature ranges from -40°C to 85°C.
- In what types of applications is the PCAL6524HEAZ commonly used? It is commonly used in consumer electronics, industrial automation, and IoT devices.
