Overview
The PCA9555DB,118 is a 24-pin CMOS device manufactured by NXP USA Inc., designed to provide 16 bits of General Purpose parallel Input/Output (GPIO) expansion for I2C-bus and SMBus applications. This device is part of NXP's family of I2C-bus I/O expanders, offering enhancements such as higher drive capability, 5 V I/O tolerance, lower supply current, individual I/O configuration, and smaller packaging. It is particularly useful in scenarios where additional I/O is needed for various components like ACPI power switches, sensors, push buttons, LEDs, and fans.
Key Specifications
| Attribute | Description |
|---|---|
| Interface Type | I2C/SMBus |
| Clock Frequency - Max | 400 kHz |
| No of I/O Lines | 16 |
| Supply Voltage - Nom | 2.3 V to 5.5 V |
| Supply Current | 160 mA |
| Package Style | SSOP-24 |
| Mounting Method | Surface Mount |
| Operating Temperature | -40°C to 85°C |
| Output Type | PUSH-PULL |
| Interrupt Output | Yes (Open-drain) |
| Lead Free Status / ROHS Status | Lead Free / ROHS Compliant |
Key Features
- Operating power supply voltage range of 2.3 V to 5.5 V
- 5 V tolerant I/Os
- Polarity Inversion register
- Active LOW interrupt output
- Low standby current
- Noise filter on SCL/SDA inputs
- No glitch on power-up
- Internal power-on reset
- 16 I/O pins which default to 16 inputs
- 0 Hz to 400 kHz clock frequency
Applications
The PCA9555DB,118 is suitable for a variety of applications in both industrial and consumer electronics. Typical uses include:
- ACPI power switches
- Sensors
- Push buttons
- LEDs
- Fans
It provides a simple solution when additional I/O is required to enhance system functionality.
Q & A
- What is the PCA9555DB,118 used for?
The PCA9555DB,118 is used for providing 16 bits of General Purpose parallel Input/Output (GPIO) expansion for I2C-bus and SMBus applications.
- What is the operating voltage range of the PCA9555DB,118?
The operating voltage range is from 2.3 V to 5.5 V.
- What is the maximum clock frequency of the PCA9555DB,118?
The maximum clock frequency is 400 kHz.
- How many I/O lines does the PCA9555DB,118 provide?
The device provides 16 I/O lines.
- What type of package does the PCA9555DB,118 come in?
The device comes in a 24-pin SSOP (Shrink Small Outline Package) package.
- Is the PCA9555DB,118 ROHS compliant?
Yes, the PCA9555DB,118 is lead-free and ROHS compliant.
- What is the operating temperature range of the PCA9555DB,118?
The operating temperature range is from -40°C to 85°C.
- Does the PCA9555DB,118 have an interrupt output?
Yes, it has an open-drain interrupt output.
- What are some typical applications of the PCA9555DB,118?
Typical applications include ACPI power switches, sensors, push buttons, LEDs, and fans.
- Does the PCA9555DB,118 have noise filtering on its inputs?
Yes, it has a noise filter on SCL/SDA inputs.
- What happens during power-up of the PCA9555DB,118?
The device has an internal power-on reset and does not produce any glitches on power-up.
