TCA6424A
- Operating power-supply voltage range of 1.65 V to 5.5 V
- Allows bidirectional voltage-level translation and GPIO expansion between:
- 1.8-V SCL/SDA and 1.8-V, 2.5-V, 3.3-V, or 5-V P Port
- 2.5-V SCL/SDA and 1.8-V, 2.5-V, 3.3-V, or 5-V P Port
- 3.3-V SCL/SDA and 1.8-V, 2.5-V, 3.3-V, or 5-V P Port
- 5-V SCL/SDA and 1.8-V, 2.5-V, 3.3-V, or 5-V P Port
- I2C to Parallel port expander
- Low standby current consumption of 1 µA
- Schmitt-Trigger action allows slow input transition and better switching noise immunity at the SCL and SDA inputs
- Vhys = 0.18 V Typ at 1.8 V
- Vhys = 0.25 V Typ at 2.5 V
- Vhys = 0.33 V Typ at 3.3 V
- Vhys = 0.5 V Typ at 5 V
- 5-V Tolerant I/O ports
- Active-low reset input ( RESET)
- Open-drain active-low interrupt output ( INT)
- 400-kHz Fast I2C Bus
- Input/output configuration register
- Polarity inversion register
- Internal power-on reset
- Power up with all channels configured as inputs
- No glitch on power up
- Noise filter on SCL/SDA inputs
- Latched outputs with high-current drive maximum 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)
The bidirectional voltage level translation in the TCA6424A is provided through VCCI. VCCI should be connected to the VCC of the external SCL/SDA lines. This indicates the VCC level of the I2C bus to the TCA6424A. The voltage level on the P-port of the TCA6424A is determined by the VCCP.
The TCA6424A consists of three 8-bit Configuration (input or output selection), Input, Output, and Polarity Inversion (active high) registers. At power on, the I/Os are configured as inputs. However, the system controller 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 controller.
The system controller can reset the TCA6424A in the event of a timeout 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. The RESET pin causes the same reset/initialization to occur without depowering the part.
The TCA6424A 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 controller 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 TCA6424A can remain a simple target device.
The device P-port outputs have high-current sink capabilities for directly driving LEDs while consuming low device current.
One hardware pin (ADDR) can be used to program and vary the fixed I2C address and allow up to two devices to share the same I2C bus or SMBus.
기술 자료
유형 | 직함 | 날짜 | ||
---|---|---|---|---|
* | Data sheet | TCA6424A Low-Voltage 24-Bit I2C and SMBus I/O Expander With Interrupt Output, Reset, and Configuration Registers datasheet (Rev. D) | PDF | HTML | 2023/01/30 |
Application note | I2C: What is the Auto Increment Feature? | PDF | HTML | 2024/07/05 | |
Application note | Understanding Transient Drive Strength vs. DC Drive Strength in Level-Shifters (Rev. A) | PDF | HTML | 2024/07/03 | |
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 | I2C Bus Pull-Up Resistor Calculation | PDF | HTML | 2015/02/13 | |
EVM User's guide | I/O Expander EVM User's Guide (Rev. A) | 2014/07/25 |
설계 및 개발
추가 조건 또는 필수 리소스는 사용 가능한 경우 아래 제목을 클릭하여 세부 정보 페이지를 확인하세요.
BOOSTXL-IOLINKM-8 — 8포트 IO-Link Master BoosterPack™
이 BoosterPack™은 Sitara™ AM243x MCU를 지원하는 LP-AM243 TI LaunchPad™ 키트와 함께 작동하도록 설계되었습니다. 이 설계는 함께 결합되어 빠르고 결정성 있는 타이밍과 독립 주기 및 비트율 구성을 지원하는 8포트 IO-Link Master를 구현합니다. 이 설계를 사용하여 OPC UA, Profinet, EtherCAT. 또는 이더넷 IP에 연결하는 원격 IO 게이트웨이를 구축할 수 있습니다. Sitara ™ 프로세서 기반 프레임 핸들러용 (...)
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
TIDA-00426 — 12Gbps 멀티 채널 BERT 보드 레퍼런스 디자인
TIDA-00609 — 자동 부팅 오디오 시스템
TIDA-00352 — SDI 비디오 애그리게이션 레퍼런스 디자인
패키지 | 핀 | CAD 기호, 풋프린트 및 3D 모델 |
---|---|---|
UQFN (RGJ) | 32 | 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.