Overview
The NXP PCA9539AHF,128 is a low-voltage 16-bit General Purpose Input/Output (GPIO) expander designed for I²C-bus/SMBus applications. This component is particularly useful in expanding the GPIO capabilities of microcontrollers and other ICs, allowing for more flexible and efficient use of I/O resources. It features an active LOW reset input and an open-drain active LOW interrupt output, making it suitable for a variety of embedded systems and industrial applications.
Key Specifications
| Specification | Value |
|---|---|
| Manufacturer | NXP USA Inc. |
| Part Number | PCA9539AHF,128 |
| Interface | I2C, SMBus |
| Supply Voltage | 1.65 V to 5.5 V |
| Number of I/Os | 16 |
| Package Type | 24-pin HWQFN Exposed Pad |
| Temperature Range | -40°C to +85°C |
| Clock Frequency | 400 kHz |
| Output Drive Capability | Up to 25 mA |
| ESD Protection | 2000 V Human Body Model, 1000 V Charged-Device Model |
Key Features
- Active LOW reset input (RESET) and open-drain active LOW interrupt output (INT)
- Schmitt-trigger action on SCL and SDA inputs for better noise immunity
- 400 kHz fast-mode I2C-bus with internal power-on reset
- 5V tolerant I/Os with no glitch on power-up
- Power-up with all channels configured as inputs
- Latched outputs with up to 25 mA drive capability for directly driving LEDs
- Latch-up performance exceeds 100 mA per JESD78, Class II
- ESD protection exceeding JESD22 2000V Human Body Model and 1000V Charged-Device Model
Applications
The PCA9539AHF,128 is suitable for a wide range of applications, including:
- Industrial automation and control systems
- Embedded systems requiring expanded GPIO capabilities
- Automotive systems where robust I/O expansion is needed
- Consumer electronics requiring flexible I/O configurations
- Medical devices and equipment needing reliable I/O expansion
Q & A
- What is the PCA9539AHF,128 used for? The PCA9539AHF,128 is a 16-bit GPIO expander used to expand the I/O capabilities of microcontrollers and other ICs in various applications.
- What are the key interfaces supported by the PCA9539AHF,128? It supports I2C and SMBus interfaces.
- What is the supply voltage range for the PCA9539AHF,128? The supply voltage range is from 1.65 V to 5.5 V.
- How many I/Os does the PCA9539AHF,128 provide? It provides 16 I/Os.
- What is the package type of the PCA9539AHF,128? It comes in a 24-pin HWQFN Exposed Pad package.
- What is the temperature range for the PCA9539AHF,128? The temperature range is from -40°C to +85°C.
- What is the maximum clock frequency supported by the PCA9539AHF,128? It supports up to 400 kHz clock frequency.
- Does the PCA9539AHF,128 have ESD protection? Yes, it has ESD protection exceeding JESD22 2000V Human Body Model and 1000V Charged-Device Model.
- Can the PCA9539AHF,128 drive LEDs directly? Yes, it can drive LEDs directly with up to 25 mA output drive capability.
- What is the reset and interrupt behavior of the PCA9539AHF,128? It has an active LOW reset input and an open-drain active LOW interrupt output.
