TCA9546A
- 1-of-4 Bidirectional translating switches
- I2C Bus and SMBus compatible
- Active-low reset input
- Three address pins, allowing up to eight TCA9546A devices on the I2C bus
- Channel selection via I2C Bus, in any combination
- Power-up with all switch channels deselected
- Low RON switches
- Allows voltage-level translation between
1.8-V, 2.5-V, 3.3-V, and 5-V buses - No glitch on power-up
- Supports hot insertion
- Low standby current
- Operating power-supply voltage range of 1.65 V to 5.5 V
- 5.5 V Tolerant inputs
- 0 to 400-kHz Clock frequency
- Latch-up performance exceeds 100 mA Per JESD 78
- ESD Protection exceeds JESD 22
- 4000-V Human-body model (A114-A)
- 1500-V Charged-device model (C101)
The TCA9546A is a quad bidirectional translating switch controlled via the I2C bus. The SCL/SDA upstream pair fans out to four downstream pairs, or channels. Any individual SCn/SDn channel or combination of channels can be selected, determined by the contents of the programmable control register.
An active-low reset (RESET) input allows the TCA9546A to recover from a situation in which one of the downstream I2C buses is stuck in a low state. Pulling RESET low resets the I2C state machine and causes all the channels to be deselected, as does the internal power-on reset function.
The pass gates of the switches are constructed such that the VCC pin can be used to limit the maximum high voltage, which will be passed by the TCA9546A. This allows the use of different bus voltages on each pair, so that 1.8-V, 2.5-V, or 3.3-V parts can communicate with 5-V parts without any additional protection. External pull-up resistors pull the bus up to the desired voltage level for each channel. All I/O pins are 5.5-V tolerant.
기술 문서
| 유형 | 직함 | 날짜 | ||
|---|---|---|---|---|
| * | Data sheet | TCA9546A Low Voltage 4-Channel I2C and SMBus Switch with Reset Function datasheet (Rev. B) | PDF | HTML | 2019/10/29 |
| Application brief | Best Practices: I2C Devices on an I3C Shared Bus | PDF | HTML | 2023/03/30 | |
| Application note | I2C Solutions for Hot Swap Applications (Rev. A) | 2023/01/31 | ||
| Application note | I2C Dynamic Addressing | 2019/04/25 | ||
| Application note | Choosing the Correct I2C Device for New Designs | PDF | HTML | 2016/09/07 | |
| Selection guide | I2C Infographic Flyer | 2015/12/03 | ||
| Application note | Understanding the I2C Bus | PDF | HTML | 2015/06/30 | |
| Application note | Maximum Clock Frequency of I2C Bus Using Repeaters | 2015/05/15 | ||
| Application note | I2C Bus Pull-Up Resistor Calculation | PDF | HTML | 2015/02/13 |
설계 및 개발
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| 패키지 | 핀 | 다운로드 |
|---|---|---|
| SOIC (D) | 16 | 옵션 보기 |
| TSSOP (PW) | 16 | 옵션 보기 |
주문 및 품질
- RoHS
- REACH
- 디바이스 마킹
- 납 마감/볼 재질
- MSL 등급/피크 리플로우
- MTBF/FIT 예측
- 물질 성분
- 인증 요약
- 지속적인 신뢰성 모니터링
- 팹 위치
- 조립 위치
권장 제품에는 본 TI 제품과 관련된 매개 변수, 평가 모듈 또는 레퍼런스 디자인이 있을 수 있습니다.