TCA9406
- 2-Bit Bidirectional Translator for SDA and SCL Lines in I2C Applications
- Provides Bidirectional Voltage Translation With No Direction Pin
- High-Impedance Output SCL_A, SDA_A, SCL_B, SDA_B Pins When OE = Low or VCC = 0 V
- Internal 10-kΩ Pullup Resistor on All SDA and SCL Pins
- 1.65 V to 3.6 V on A port and 2.3 V to 5.5 V on B port (VCCA ≤ VCCB)
- VCC Isolation Feature: If Either VCC Input Is at GND, Both Ports Are in the High-Impedance State
- No Power-Supply Sequencing Required: Either VCCA or VCCB Can Be Ramped First
- Low Ioff of 2 µA When Either VCCA or VCCB = 0 V
- OE Input Can Be Tied Directly to VCCA Or Controlled By GPIO
- Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
- ESD Protection Exceeds JESD 22
- A Port
- 2500-V Human-Body Model (A114-B)
- 250-V Machine Model (A115-A)
- 1500-V Charged-Device Model (C101)
- B Port
- 8-kV Human-Body Model (A114-B)
- 250-V Machine Model (A115-A)
- 1500-V Charged-Device Model (C101)
- A Port
The TCA9406 is a 2-bit bidirectional I2C and SMBus voltage-level translator with an output enable (OE) input. It is operational from 1.65 V to 3.6 V on the A-side, referenced toVCCA, and from 2.3 V to 5.5 V on the B-side, referenced to VCCB. This allows the device to interface between lower and higher logic signal levels at any of the typical 1.8-V, 2.5-V, 3.3-V, and
5-V supply rails.
The OE input pin is referenced to VCCA, can be tied directly to VCCA, but it is also 5.5-V tolerant. The OE pin can also be controlled and set to a logic low to place all the SCL and SDA pins in a high-impedance state, which significantly reduces the quiescent current consumption.
Under normal I2C and SMBus operation or other open-drain configurations, the TCA9406 can support up to 2 Mbps; therefore, it is compatible with standard I2C speeds where the frequency of SCL is 100 kHz (Standard-mode), 400 kHz (Fast-mode), or 1 MHz (Fast-mode Plus). The device can also be used as a general purpose level translator, and when the A- and B-side ports are both driven with push-pull devices the TCA9406 can support up to 24 Mbps.
The TCA9406 features internal 10-kΩ pullup resistors on SCL_A, SDA_A, SCL_B, and SDA_B. Additional external pullup resistors can be added to the bus to reduce the total pullup resistance and speed up rising edges.
기술 자료
| 유형 | 직함 | 날짜 | ||
|---|---|---|---|---|
| * | Data sheet | TCA9406 2-Bit Bidirectional 1-MHz, I2C Bus and SMBus Voltage-Level Translator With 8-kV HBM ESD datasheet (Rev. G) | PDF | HTML | 2018/11/29 |
| Application note | Understanding Transient Drive Strength vs. DC Drive Strength in Level-Shifters (Rev. A) | PDF | HTML | 2024/07/03 | |
| 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.
DS90UB9702-Q1EVM — DS90UB9702-Q1 평가 모듈
TCA9406EVM — 상승 시간 가속기가 포함된 TCA9406 I2C 트랜스레이터 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 착수하기 (...)
TINA-TI — SPICE 기반 아날로그 시뮬레이션 프로그램
TIDA-01572 — 디지털 입력, 클래스 D, IV 감지 오디오 증폭기의 스테레오 평가 모듈 레퍼런스 디자인
TIDA-00609 — 자동 부팅 오디오 시스템
| 패키지 | 핀 | CAD 기호, 풋프린트 및 3D 모델 |
|---|---|---|
| DSBGA (YZP) | 8 | Ultra Librarian |
| SSOP (DCT) | 8 | Ultra Librarian |
| VSSOP (DCU) | 8 | Ultra Librarian |
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.