PCA9555PWR
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| Part Number | PCA9555PWR |
|---|---|
| Manufacturer |
 Texas Instruments
|
| Description | The PCA9555PWR is a versatile and widely used 16-bit I2C/SMBus I/O expander developed by Texas Instruments, designed to extend the number of general-purpose input/output pins in microcontroller-based systems. It provides an efficient solution for expanding digital I/O capability without increasing processor pin count. This device operates within a 2.3V to 5.5V supply voltage range and communicates via a standard I2C interface with speeds up to 400kHz, ensuring compatibility with a wide range of embedded platforms. It features 16 programmable I/O ports, organized as two 8-bit banks, each configurable as input or output through internal registers. The PCA9555PWR includes input, output, polarity inversion, and configuration registers, allowing flexible control of each I/O pin. At power-up, all pins default to input mode, and the system controller can dynamically configure them as needed. An integrated open-drain active-low interrupt output notifies the host microcontroller of input state changes, reducing the need for constant polling and improving system efficiency. It also supports hardware address selection using three address pins, enabling up to eight devices on the same I2C bus. The device offers low standby current consumption (as low as 1µA) and 5V-tolerant I/O ports, making it suitable for low-power and mixed-voltage systems. Its outputs are latched and capable of directly driving loads such as LEDs, enhancing design flexibility. Encapsulated in a compact 24-pin TSSOP surface-mount package, the PCA9555PWR is ideal for space-constrained PCB designs while maintaining robust electrical performance. The PCA9555PWR is commonly used in embedded systems, industrial control, I/O expansion modules, LED control applications, communication systems, and IoT devices, where additional digital I/O channels are required with minimal hardware complexity. |
| Product Group | Port Expander |
| MOQ | 2000 pcs |
| SPQ | 2000 pcs |
| Figure/Case | TSSOP-24 |
| Package | T&R Pack |
 PDF Datasheet | |
| Ship From | Hong Kong |
| Shipment Way | DHL / Fedex / TNT / UPS / Others |
| Delivery Term | Ex-Works |
| Send RFQ | sales@signalhk.com |
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PCA9555PWR
PCA9555PWR