PCA9539
- Low standby-current consumption of 1 µA max
- I2C to Parallel port expander
- Open-drain active-low interrupt output
- Active-low reset input
- 5-V Tolerant I/O ports
- Compatible with most microcontrollers
- 400-kHz Fast I2C Bus
- Polarity inversion register
- Address by two hardware address pins for use of up to four devices
- 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)
- 1000-V Charged-device model (C101)
The system master can reset the PCA9539 in the event of a time-out or other improper operation by asserting a low in the RESET input. The power-on reset puts the registers in their default state and initializes the I2C/SMBus state machine. Asserting RESET causes the same reset/initialization to occur without de-powering the part.
The PCA9539 open-drain interrupt ( INT) output is activated when any input state differs from its corresponding Input Port register state and is used to indicate to the system master that an input state has changed.
INT can be connected to the interrupt input of a microcontroller. By sending an interrupt signal on this line, the remote I/O can inform the microcontroller if there is incoming data on its ports without having to communicate via the I2C bus. Thus, the PCA9539 can remain a simple slave device.
The device outputs (latched) have high-current drive capability for directly driving LEDs. The device has low current consumption.
The PCA9539 is identical to the PCA9555, except for the removal of the internal I/O pullup resistor, which greatly reduces power consumption when the I/Os are held low, replacement of A2 with RESET, and a different address range.
Two hardware pins (A0 and A1) are used to program and vary the fixed I2C address and allow up to four devices to share the same I2C bus or SMBus.
기술 자료
| 상위 문서 | 유형 | 직함 | 형식 옵션 | 최신 영어 버전 다운로드 | 날짜 |
|---|---|---|---|---|---|
| * | 데이터 시트 | PCA9539 Remote 16-Bit I2C and SMBus Low-Power I/O Expander With Interrupt Output, Reset, and Configuration Registers datasheet (Rev. H) | PDF | HTML | 2021. 3. 10 | |
| 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 | Maximum Clock Frequency of I2C Bus Using Repeaters | 2015. 5. 15 | |||
| 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 |
|---|---|---|
| SSOP (DB) | 24 | Ultra Librarian |
| VQFN (RGE) | 24 | Ultra Librarian |
| TVSOP (DGV) | 24 | Ultra Librarian |
| SSOP (DBQ) | 24 | Ultra Librarian |
| SOIC (DW) | 24 | Ultra Librarian |
| TSSOP (PW) | 24 | Ultra Librarian |
주문 및 품질
권장 제품에는 본 TI 제품과 관련된 매개 변수, 평가 모듈 또는 레퍼런스 디자인이 있을 수 있습니다.