TCA9801
- Two-channel bidirectional buffer
- Integrated current source on B-side, requires no external B-side resistors
- Ultra-low power consumption
- No static-voltage offset, low VOL
- I2C bus and SMBus compatible
- Operating supply voltage range of 0.8 V to 3.6 V on A-side
- Operating supply voltage range of 1.65 V to 3.6 V on B-side
- Active-high repeater enable input
- Powered-off high impedance I2C bus pins on A-side
- Powered-off back-power protection I2C bus pins
- Support for clock stretching and multiple master arbitration
- Family of current source options from 0.5 mA to 3 mA
The TCA9801 is a dual-channel bidirectional buffer intended for I2C bus and SMBus/PMBus systems. It provides bidirectional level shifting (up-translation and down-translation) between low voltages (down to 0.8 V) and higher voltages (1.65 V to 3.6 V). The TCA9801 features an internal current source on the B-side of the device, allowing the removal of external pull-up resistors on the B-side. The current source also provides an improved rise time and ultra-low power consumption.
The TCA9801 is able to provide true buffering (rather than a pass-FET solution) without using a static voltage offset or incremental offset. This means that the VOL on both the A and B sides of the TCA9801 are very low (approximately 0.2 V), helping to eliminate communication issues as a result of fixed VIL thresholds. Another key feature of the TCA9801 is that there are no power sequencing requirements, or power supply dependencies. VCCA can be greater than, less than, or equal to VCCB. This gives the system designer flexibility with how the TCA9801 is used.
The TCA9801 is part of a four device family with varying current source strengths (see the Device Comparison Table).
기술 문서
| 유형 | 직함 | 날짜 | ||
|---|---|---|---|---|
| * | Data sheet | TCA9801 Level-Translating I2C Bus Buffer/Repeater datasheet (Rev. B) | PDF | HTML | 2020/02/13 |
| Application brief | Best Practices: I2C Devices on an I3C Shared Bus | PDF | HTML | 2023/03/30 | |
| Application note | Why, When, and How to use I2C Buffers | 2018/05/23 | ||
| Application note | Advantages and Design Considerations of the TCA980x Family | 2017/03/30 | ||
| 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
추가 조건 또는 필수 리소스는 사용 가능한 경우 아래 제목을 클릭하여 세부 정보 페이지를 확인하세요.
TCA9802EVM — TCA980x I²C 및 SMBus 레벨 시프터 제품군 평가 모듈
I2C-DESIGNER — I2C 디자이너 툴
PSPICE-FOR-TI — TI 설계 및 시뮬레이션 툴용 PSpice®
TI 설계 및 시뮬레이션 환경용 PSpice는 기본 제공 라이브러리를 이용해 복잡한 혼합 신호 설계를 시뮬레이션할 수 있습니다. 레이아웃 및 제작에 (...)
TINA-TI — SPICE 기반 아날로그 시뮬레이션 프로그램
| 패키지 | 핀 | 다운로드 |
|---|---|---|
| VSSOP (DGK) | 8 | 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.