Overview
The PCA9557PW,118 is a silicon CMOS circuit designed by NXP Semiconductors to provide parallel input/output expansion for SMBus and I²C-bus applications. This 8-bit I/O expander is particularly useful in expanding the number of I/O ports in various electronic systems. It features an I²C/SMBus interface, allowing for easy control and monitoring of the I/O ports. The PCA9557PW,118 is a versatile component that offers a migration path from lower performance devices like the PCA9556, with enhanced features such as low current consumption and high-impedance open-drain output pins.
Key Specifications
| Parameter | Value |
|---|---|
| Interface Type | I²C/SMBus |
| Clock Frequency - Max | 400 kHz |
| Number of I/O Lines | 8 |
| Supply Voltage - Nom | 1.65V to 5.5V |
| Supply Current | 85 mA |
| Package Style | TSSOP-16 |
| Mounting Method | Surface Mount |
| Operating Temperature Range | -40°C to +125°C |
Key Features
- I²C Interface: Allows for easy control and monitoring of the I/O ports.
- Wide Supply Voltage Range: Supports operation from 1.65V to 5.5V.
- Programmable Output Pins: Configurable as input, output, or inverted I/O.
- High Drive Capability: Suitable for driving LEDs, relays, and other loads.
- Interrupt Function: Allows the host to be notified of input changes.
- Low Standby Current: Ideal for battery-powered applications.
- High-Impedance Open-Drain Output Pin: On IO0, with no glitch on power-up and power-up with all channels configured as inputs.
- ESD Protection: Exceeds 2000 V HBM per JESD22-A114, 150 V MM per JESD22-A115, and 1000 V CDM per JESD22-C101.
Applications
- Industrial Automation: Used for controlling various sensors, actuators, and indicators due to its versatility in configuring I/O modes.
- Consumer Electronics: Utilized for expanding I/O capabilities in devices such as smart home systems, IoT devices, and consumer gadgets.
- Automotive: Used for controlling lighting systems, switches, and sensors, benefiting from its high drive capability.
- Embedded Systems: Incorporated for adding additional I/O ports to microcontroller-based designs, simplifying system development).
Q & A
- What is the PCA9557PW,118 used for?
The PCA9557PW,118 is used for parallel input/output expansion in SMBus and I²C-bus applications, expanding the number of I/O ports in various electronic systems.
- What is the interface type of the PCA9557PW,118?
The interface type is I²C/SMBus.
- What is the maximum clock frequency of the PCA9557PW,118?
The maximum clock frequency is 400 kHz.
- How many I/O lines does the PCA9557PW,118 have?
The PCA9557PW,118 has 8 I/O lines.
- What is the supply voltage range of the PCA9557PW,118?
The supply voltage range is from 1.65V to 5.5V.
- What is the package style of the PCA9557PW,118?
The package style is TSSOP-16.
- What are the key features of the PCA9557PW,118?
Key features include an I²C interface, wide supply voltage range, programmable output pins, high drive capability, interrupt function, and low standby current.
- In which applications is the PCA9557PW,118 commonly used?
It is commonly used in industrial automation, consumer electronics, automotive systems, and embedded systems.
- What is the operating temperature range of the PCA9557PW,118?
The operating temperature range is -40°C to +125°C.
- Does the PCA9557PW,118 have ESD protection?
Yes, it exceeds 2000 V HBM per JESD22-A114, 150 V MM per JESD22-A115, and 1000 V CDM per JESD22-C101.
