PCA9555
- Low Standby-Current Consumption of 1 µA Max
- I2C to Parallel Port Expander
- Open-Drain Active-Low Interrupt Output
- 5-V Tolerant I/O Ports
- Compatible With Most Microcontrollers
- 400-kHz Fast I2C Bus
- Address by Three Hardware Address Pins for Use of up to Eight Devices
- Polarity Inversion Register
- Latched Outputs With High-Current Drive Capability for Directly Driving LEDs
- Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
- ESD Protection Exceeds JESD 22
- 2000-V Human-Body Model (A114-A)
- 200-V Machine Model (A115-A)
- 1000-V Charged-Device Model (C101)
This 16-bit I/O expander for the two-line bidirectional bus (I2C) is designed for 2.3-V to 5.5-V VCC operation. It provides general-purpose remote I/O expansion for most microcontroller families via the I2C interface [serial clock (SCL), serial data (SDA)].
The PCA9555 consists of two 8-bit Configuration (input or output selection), Input Port, Output Port, and Polarity Inversion (active high or active low operation) registers. At power on, the I/Os are configured as inputs. The system master can enable the I/Os as either inputs or outputs by writing to the I/O configuration bits. The data for each input or output is kept in the corresponding Input or Output register. The polarity of the Input Port register can be inverted with the Polarity Inversion register. All registers can be read by the system master.
기술 자료
| 상위 문서 | 유형 | 직함 | 형식 옵션 | 최신 영어 버전 다운로드 | 날짜 |
|---|---|---|---|---|---|
| * | 데이터 시트 | PCA9555 Remote 16-bit I2C and SMBus I/O Expander with Interrupt Output and Configuration Registers datasheet (Rev. J) | PDF | HTML | 2021. 3. 11 | |
| 애플리케이션 노트 | I2C: What is the Auto Increment Feature? | PDF | HTML | 2024. 7. 5 | ||
| 애플리케이션 노트 | Understanding Transient Drive Strength vs. DC Drive Strength in Level-Shifters (Rev. A) | PDF | HTML | 2024. 7. 3 | ||
| 애플리케이션 노트 | I2C Dynamic Addressing | 2019. 4. 25 | |||
| 애플리케이션 노트 | Choosing the Correct I2C Device for New Designs | PDF | HTML | 2016. 9. 7 | ||
| 애플리케이션 노트 | Understanding the I2C Bus | PDF | HTML | 2015. 6. 30 | ||
| 애플리케이션 노트 | I2C Bus Pull-Up Resistor Calculation | PDF | HTML | 2015. 2. 13 |
설계 및 개발
추가 조건 또는 필수 리소스는 사용 가능한 경우 아래 제목을 클릭하여 세부 정보 페이지를 확인하세요.
I2C-DESIGNER — I2C 디자이너 툴
| 패키지 | 핀 | CAD 기호, 풋프린트 및 3D 모델 |
|---|---|---|
| TSSOP (PW) | 24 | Ultra Librarian |
| SSOP (DB) | 24 | Ultra Librarian |
| TVSOP (DGV) | 24 | Ultra Librarian |
| SSOP (DBQ) | 24 | Ultra Librarian |
| VQFN (RGE) | 24 | Ultra Librarian |
| SOIC (DW) | 24 | Ultra Librarian |
주문 및 품질
권장 제품에는 본 TI 제품과 관련된 매개 변수, 평가 모듈 또는 레퍼런스 디자인이 있을 수 있습니다.