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PCA9557PWT
Introduction
The PCA9557PWT is a versatile and widely used I2C-bus controlled 8-bit I/O expander for the two-line bidirectional bus (I2C) and designed to provide general-purpose remote I/O expansion for most microcontroller families via the I2C interface. This entry provides an overview of the PCA9557PWT, including its product details, specifications, pin configuration, functional features, advantages, disadvantages, working principles, application field plans, and alternative models.
Product Overview
- Category: I/O Expander
- Use: Remote I/O Expansion
- Characteristics: I2C-Bus Controlled, 8-Bit I/O Expander
- Package: TSSOP (Thin Shrink Small Outline Package)
- Essence: General-Purpose Remote I/O Expansion
- Packaging/Quantity: Tape & Reel (2500 units per reel)
Specifications
- Operating Voltage: 2.3V to 5.5V
- I/O Pins: 8
- I2C Address: 7-bit addressing
- Operating Temperature Range: -40°C to +85°C
- Output Drive Capability: 25mA at 5V
- Standby Current Consumption: 1µA
Detailed Pin Configuration
The PCA9557PWT features a TSSOP package with the following pin configuration: 1. P0 - I/O Port 0 2. P1 - I/O Port 1 3. P2 - I/O Port 2 4. P3 - I/O Port 3 5. P4 - I/O Port 4 6. P5 - I/O Port 5 7. P6 - I/O Port 6 8. P7 - I/O Port 7 9. SDA - I2C Serial Data Input/Output 10. SCL - I2C Serial Clock Input
Functional Features
- Bidirectional Operation
- Active-Low Interrupt Output
- Polarity Inversion Register
- Internal Power-On Reset
- Noise Filter on SCL/SDA Inputs
Advantages
- Simplifies I/O Expansion
- Low Standby Current Consumption
- Wide Operating Voltage Range
- Easy Integration with Microcontrollers
Disadvantages
- Limited Number of I/O Pins
- Requires I2C Interface Support
Working Principles
The PCA9557PWT operates as an I/O expander by providing additional I/O pins controlled through the I2C interface. It allows microcontrollers to expand their I/O capabilities without requiring additional GPIO pins.
Detailed Application Field Plans
The PCA9557PWT finds applications in various fields, including: - Industrial Automation - Consumer Electronics - Automotive Systems - IoT (Internet of Things) Devices - Embedded Systems
Detailed and Complete Alternative Models
Some alternative models to the PCA9557PWT include: - MCP23008 - PCF8574 - MAX7311
In summary, the PCA9557PWT is a reliable and widely used I/O expander with versatile applications across different industries. Its I2C-bus compatibility and low standby current consumption make it an attractive choice for designers seeking to expand the I/O capabilities of their microcontroller-based systems.
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What is PCA9557PWT?
- PCA9557PWT is an 8-bit I2C-bus and SMBus I/O port with interrupt and reset.
What is the operating voltage range of PCA9557PWT?
- The operating voltage range of PCA9557PWT is from 2.3V to 5.5V.
How many I/O ports does PCA9557PWT have?
- PCA9557PWT has 8 I/O ports.
Can PCA9557PWT be used for LED dimming control?
- Yes, PCA9557PWT can be used for LED dimming control as it supports PWM output.
What is the maximum frequency supported by PCA9557PWT for PWM output?
- The maximum frequency supported by PCA9557PWT for PWM output is 1600 Hz.
Does PCA9557PWT support hardware addressing?
- Yes, PCA9557PWT supports hardware addressing through three address pins.
Is PCA9557PWT suitable for battery-powered applications?
- Yes, PCA9557PWT is suitable for battery-powered applications due to its low power consumption.
Can PCA9557PWT be cascaded with other I2C devices?
- Yes, PCA9557PWT can be cascaded with other I2C devices as it supports the I2C-bus interface.
What is the maximum sink current per I/O port of PCA9557PWT?
- The maximum sink current per I/O port of PCA9557PWT is 25mA.
Does PCA9557PWT have built-in ESD protection?
- Yes, PCA9557PWT has built-in ESD protection on all I/O pins.