The PCA9554 is an 8-bit I2C and SMBus I/O expander designed for operation within a power supply voltage range of 2.3 V to 5.5 V. It features an open-drain active-low interrupt output, allowing it to signal changes in input states to a microcontroller without continuous communication over the I2C bus. The device supports a 400-kHz fast I2C bus and can accommodate up to eight devices on the same bus through three hardware address pins. The PCA9554 includes configuration registers for input/output selection and a polarity inversion register, enabling flexible control of the I/O pins. At power-up, all channels are configured as inputs with weak pull-ups to VCC, and the device includes an internal power-on reset feature to ensure proper initialization. The outputs are latched and capable of driving high-current loads, such as LEDs. This part is compatible with the PCF8574 in terms of pin configuration and I2C addressing, although software modifications may be necessary due to the PCA9554's enhanced features. The device is available in various packages, including SSOP and TSSOP, and operates within a temperature range of -40¬8C to 85¬8C.
Remote 8-Bit I2C and SMBus I/O Expander with Interrupt Output and Configuration Registers 16-SSOP -40 to 85
I/O Expander 8 I²C, SMBus 400kHz 16-SSOP
Manufacturer: Texas Instruments
Win Source Part Number: 082060-PCA9554DB
Packaging: Reel - TR
Features: POR
Mounting: SMD (SMT)
Output Type: Push-Pull
Number of I/O: 8
Current - Output Source/Sink: 10mA, 25mA
Interrupt Output: Yes
Categories: Integrated Circuits
Status: Active
Temperature Range - Operating: -40°C to 85°C
Case / Package: 16-SSOP
Supply Voltage - Operating: 2.3 V to 5.5 V
Max Frequency: 400kHz
Is this a common-used part?: Yes
Popularity: High
Fake Threat In the Open Market: 64 pct.
Supply and Demand Status: Limited
Remote 8-Bit I2C and SMBus I/O Expander with Interrupt Output and Configuration Registers 16-SSOP -40 to 85 Product overview: PCA9554DB from Texas Instruments is an Interface Transceiver IC for serial communication, bus conversion, signal driving, receiver stages, and industrial networking. It is useful for engineers and buyers comparing datasheets, replacement parts, BOM lines, package options, lifecycle status, and procurement availability. Key searchable attributes include 8-bit, SSOP. Search-friendly keywords include interface IC, transceiver, driver, receiver, CAN, RS-485, 8-bit, SSOP, Interface Transceiver IC, I/O Expanders. This listing supports clearer product discovery for industrial, commercial, repair, automation, power, sensing, and embedded system projects. Product number 749-PCA9554DB can be used for catalog matching and distributor lookup.
Interface - I/O Expanders Remote 8-Bit I2C and SMBus I/O Expander
I/O Expander 8 I²C, SMBus 400 kHz 16-SSOP
| Texas Instruments | DigiKey | Win Source Electronics | ERSAELECTRONICS PTE. LTD. | VAST STOCK CO., LIMITED | Quarktwin Technology Ltd. | |
|---|---|---|---|---|---|---|
| Product Category | IC Interfaces | IC Interfaces | IC Interfaces | IC Interfaces | IC Interfaces | IC Interfaces |
| Product Number | PCA9554DB | 296-33515-5-ND | 082060-PCA9554DB | 749-PCA9554DB | PCA9554DB | PCA9554DB |
| Product Name | PCA9554 Remote 8-Bit I2C and SMBus I/O Expander with Interrupt Output and Configuration Registers | I/O Expanders | Interface - Interface - I/O Expanders - PCA9554DB | 8-bit SSOP Interface Transceiver IC | Interface - I/O Expanders | I/O Expanders |
| Technology | I2C | I2C; SMBus | I2C; SMBus; I²C, SMBus | |||
| Device Type | Port / Bus Expander | Port / Bus Expander | Transceiver | Port / Bus Expander | ||
| Features | RoHS | RoHS | RoHS | RoHS |
