Overview
The PCA9558PW118 is a 16-bit I2C-bus and SMBus I/O expander produced by NXP USA Inc. This integrated circuit is designed to provide additional I/O ports for microcontrollers, enhancing the overall system's capability to manage and control external devices. The PCA9558PW118 is particularly useful in applications where the available I/O ports on the microcontroller are limited.
Key Specifications
| Parameter | Value |
|---|---|
| Number of I/O Ports | 16 bits |
| Interface | I2C-bus and SMBus |
| Supply Voltage | 2.3 V to 5.5 V |
| Standby Current | 1 μA max |
| I2C Bus Speed | Up to 400 kHz |
| Addressing | Three hardware address pins for up to eight devices |
| Package Type | TSSOP (20 pins) |
| ESD Protection | Exceeds JESD 22 – 2000-V Human-Body Model, 200-V Machine Model, 1000-V Charged-Device Model |
Key Features
- Low standby-current consumption of 1 μA max.
- I2C to parallel port expander.
- Open-drain active-low interrupt output.
- 5-V tolerant I/O ports.
- Compatible with most microcontrollers.
- Latched outputs with high-current drive capability for directly driving LEDs.
- Polarity inversion register.
- ESD protection exceeds JESD 22 standards.
Applications
- Servers and data centers.
- Industrial automation and control systems.
- Consumer electronics.
- Automotive systems.
- IoT devices.
Q & A
- What is the PCA9558PW118 used for? The PCA9558PW118 is used as an I2C-bus and SMBus I/O expander to provide additional I/O ports for microcontrollers.
- What is the supply voltage range for the PCA9558PW118? The supply voltage range is from 2.3 V to 5.5 V.
- How many I/O ports does the PCA9558PW118 have? The PCA9558PW118 has 16 bits of I/O ports.
- What is the maximum standby current of the PCA9558PW118? The maximum standby current is 1 μA.
- What is the I2C bus speed of the PCA9558PW118? The I2C bus speed can be up to 400 kHz.
- How many devices can be addressed using the PCA9558PW118? Up to eight devices can be addressed using three hardware address pins.
- What type of package does the PCA9558PW118 come in? The PCA9558PW118 comes in a TSSOP (20 pins) package.
- Does the PCA9558PW118 have ESD protection? Yes, it exceeds JESD 22 standards for ESD protection.
- Can the PCA9558PW118 drive LEDs directly? Yes, it has latched outputs with high-current drive capability for directly driving LEDs.
- Is the PCA9558PW118 compatible with most microcontrollers? Yes, it is compatible with most microcontrollers.
