Overview
The PCA9538ABSHP, produced by NXP USA Inc., is a low-voltage 8-bit General Purpose Input/Output (GPIO) expander designed for I²C-bus/SMBus applications. This component is part of NXP's family of I/O expanders, which provide a simple solution for adding additional I/Os to a system while minimizing interconnections. The PCA9538A series, including the PCA9538ABSHP, is particularly useful in scenarios where additional GPIOs are required, such as in ACPI power switches, sensors, push buttons, LEDs, and fan control.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| VDD Supply Voltage | Operating range | 1.65 V to 5.5 V |
| Input Voltage | Maximum rating | -0.5 V to +6.5 V |
| Output Voltage | Maximum rating | -0.5 V to +6.5 V |
| I²C-Bus Speed | Fast-mode | 400 kHz |
| Interrupt Output | Type | Open-drain active LOW |
| Output Drive Capability | Maximum current | 25 mA |
| Package Type | Available packages | HVQFN16, TSSOP16 |
| ESD Protection | Human Body Model | 2000 V (A114-A) |
| ESD Protection | Charged-Device Model | 1000 V (C101) |
Key Features
- Low-voltage operation: Compatible with supply levels from 1.65 V to 5.5 V, making it suitable for next-generation microprocessors and microcontrollers.
- 8-bit GPIO expander: Provides eight configurable I/O pins that can be used as inputs or outputs.
- Interrupt and reset: Features an open-drain active LOW interrupt output and internal power-on reset.
- No glitch on power-up: Ensures that all channels are configured as inputs on power-up, preventing any unwanted output transitions.
- Latched outputs: Outputs are latched, providing stable output states even during power-up.
- High drive capability: Outputs can drive up to 25 mA, suitable for directly driving LEDs.
- ESD protection: Exceeds JESD22 standards with 2000 V Human Body Model and 1000 V Charged-Device Model protection.
Applications
- ACPI power switches: Used in power management systems to control power states.
- Sensors: Expands the I/O capability for connecting various sensors.
- Push buttons and LEDs: Manages input from push buttons and output to LEDs.
- Fan control: Controls fan operation in various electronic systems.
- General-purpose I/O expansion: Useful in any application requiring additional I/O ports.
Q & A
- What is the PCA9538ABSHP used for?
The PCA9538ABSHP is a low-voltage 8-bit General Purpose Input/Output (GPIO) expander used to add additional I/Os to a system, particularly in I²C-bus/SMBus applications.
- What is the operating voltage range of the PCA9538ABSHP?
The PCA9538ABSHP operates within a supply voltage range of 1.65 V to 5.5 V.
- What types of packages are available for the PCA9538ABSHP?
The PCA9538ABSHP is available in HVQFN16 and TSSOP16 packages.
- Does the PCA9538ABSHP have built-in ESD protection?
- What is the maximum output drive capability of the PCA9538ABSHP?
The outputs of the PCA9538ABSHP can drive up to 25 mA, making them suitable for directly driving LEDs.
- Does the PCA9538ABSHP have an interrupt feature?
- What is the I²C-bus speed of the PCA9538ABSHP?
The PCA9538ABSHP supports Fast-mode I²C-bus speeds up to 400 kHz.
- How does the PCA9538ABSHP behave on power-up?
- Can the PCA9538ABSHP be used in ACPI power switches?
- Is the PCA9538ABSHP a pin-to-pin replacement for other industry-standard devices?
