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PCA9555PW
+БОМIC XPND 400KHZ I2C SMBUS 24TSSOP
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ПроизводительТехасские инструменты
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Мфр. Часть #PCA9555PW
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В наличии4515
365 Дни гарантии качества
7*24 часы обслуживания каранти
90-гарантия послепродажного дня
Гарантия подлинного продукта
Спецификации
| Атрибут | Ценность |
| Part Status | Obsolete |
| Base Product Number | PCA9555 |
| DigiKey Programmable | Not Verified |
| Number of I/O | 16 |
| Interface | I2C, SMBus |
| Interrupt Output | Yes |
| Features | POR |
| Output Type | Push-Pull |
| Current - Output Source/Sink | 10mA, 25mA |
| Clock Frequency | 400 kHz |
| Voltage - Supply | 2.3V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C |
| Mounting Type | Surface Mount |
| Package | 24-TSSOP (0.173", 4.40mm Width) |
| Supplier Device Package | 24-TSSOP |
| Packaging | Tube |
Обзор
Description
Key features of the PCA9555PW include two 8-bit bidirectional I/O ports, interrupt output for port change notification, and polarity inversion register to reverse the logic level of input ports. Each I/O can be configured as either input or output, and the device supports active-low interrupt output to alert processors of input state changes.
The PCA9555PW communicates with the host through I2C-bus, supporting standard (100 kHz), fast (400 kHz), and fast-mode plus (1 MHz) I2C frequencies. It is packaged in a TSSOP, which is compact and suitable for space-constrained applications.
Overall, the PCA9555PW is ideal for expanding digital I/O in embedded systems, such as in industrial control, consumer electronics, and instrumentation.
Equivalent
Features
1. I²C Interface: Compatible with both standard (100 kHz) and fast (400 kHz) I²C interfaces, allowing easy integration with microcontrollers.
2. 16 I/O Pins: Provides 16 programmable I/O pins that can be configured individually as input or output, expanding the I/O capability of the host device.
3. Addressability: Supports up to eight devices on the same I²C bus, enabling a total of 128 I/O ports when fully utilized.
4. Interrupt Output: Features an interrupt output pin that alerts the controller to input changes, enhancing real-time monitoring capabilities.
5. Polarity Inversion: Allows the inversion of input data, providing flexibility in handling input signals.
6. Low Standby Current: Designed for low power consumption, making it suitable for battery-operated applications.
7. Wide Voltage Range: Operates within a voltage range of 2.3V to 5.5V, supporting compatibility with various logic levels.
These features make the PCA9555PW a versatile solution for expanding digital I/O in embedded systems.
Pinout
- GND: Ground reference.
- VCC: Power supply.
- SDA: Serial data line for I2C communication.
- SCL: Serial clock line for I2C communication.
- INT: Interrupt output, active low, used to signal a change in the input port data.
- A0, A1, A2: I2C address selection pins.
- P0_0 to P0_7 and P1_0 to P1_7: GPIO pins, configurable as either inputs or outputs.
The PCA9555PW is commonly used in applications where microcontroller I/O needs to be expanded, and it communicates over the I2C bus with a configurable address, allowing up to 8 devices to be connected to the same bus.
Manufacturer
Application
1. Consumer Electronics: Enhancing functionality in devices like TVs, set-top boxes, and home appliances by managing various inputs and outputs.
2. Industrial Automation: Facilitating control systems, sensors, and actuators in factory settings.
3. Networking Equipment: Managing LED indicators and control signals in routers and switches.
4. Automotive Electronics: Supporting infotainment systems, dashboard controls, and other vehicle subsystems.
5. IoT Devices: Expanding connectivity options for smart devices and sensor networks.
The device is valued for its I2C interface, low power consumption, and ability to provide additional GPIOs in space-constrained applications.
Package
Frequently Asked Questions
Q: What is the supply voltage range for the PCA9555PW?
A: The PCA9555PW operates with a supply voltage range of 2.3V to 5.5V, suitable for both 3.3V and 5V systems.
Q: Does this device support interrupt output for status monitoring?
A: Yes, it features an interrupt output pin that alerts the master when input port states change, reducing continuous polling.
Q: What is the maximum I2C clock frequency supported?
A: The device supports a standard clock frequency of 400 kHz, compatible with Fast-mode I2C and SMBus interfaces.
Q: How many I/O pins are available and what is their output drive capability?
A: It provides 16 I/O pins with push-pull output; source current is 10mA and sink current is 25mA per pin.
Q: Does the PCA9555PW include power-on reset functionality?
A: Yes, it features a Power-On Reset (POR) circuit to ensure registers are initialized to default states on power-up.
Q: What package options are available for this part?
A: It comes in a 24-TSSOP package with a 4.40mm width, designed for surface mount assembly. The supplier device package is also 24-TSSOP.
Q: What is the operating temperature range for this IC?
A: The device is specified for operation from -40°C to 85°C, making it suitable for industrial environments.
