Firmware
TCA6424A
Expansor de E/S I2C/SMBus de 1.65 V a 5.5 V de traducción de 24 bits con registros de interrupción,
Hoja de datos
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.
Documentación técnica
No se encontraron resultados. Borre su búsqueda y vuelva a intentarlo.
Ver todo 9 | Tipo | Título | Fecha | ||
|---|---|---|---|---|
| * | 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 | 30 ene 2023 |
| Application note | I2C: What is the Auto Increment Feature? | PDF | HTML | 05 jul 2024 | |
| Application note | Understanding Transient Drive Strength vs. DC Drive Strength in Level-Shifters (Rev. A) | PDF | HTML | 03 jul 2024 | |
| Application note | I2C Dynamic Addressing | 25 abr 2019 | ||
| Application note | Choosing the Correct I2C Device for New Designs | PDF | HTML | 07 sep 2016 | |
| Selection guide | I2C Infographic Flyer | 03 dic 2015 | ||
| Application note | Understanding the I2C Bus | PDF | HTML | 30 jun 2015 | |
| Application note | I2C Bus Pull-Up Resistor Calculation | PDF | HTML | 13 feb 2015 | |
| EVM User's guide | I/O Expander EVM User's Guide (Rev. A) | 25 jul 2014 |
Diseño y desarrollo
Para conocer los términos adicionales o los recursos necesarios, haga clic en cualquier título de abajo para ver la página de detalles cuando esté disponible.
Placa de evaluación
BOOSTXL-IOLINKM-8 — BoosterPack™ maestro IO-Link de 8 puertos
Este BoosterPack™se diseñó para funcionar con el kit LP-AM243 TI LaunchPad™ con Sitara™ AM243x MCU. En conjunto, este diseño implementa un dispositivo maestro IO-Link de 8 puertos con temporización rápida y determinista y configuración independiente de ciclos y velocidad de bits. Este diseño se (...)
Guía del usuario: PDF
Placa de evaluación
IO-EXPANDER-EVM — IO-EXPANDER-EVM: Módulo de evaluación de expansión de E/S I2C y SMBus
El módulo de evaluación (EVM) de expansión de E/S le permite evaluar la cartera de dispositivos de la línea de expansión de E/S SMBus y I2C de TI . Tanto el TCA6424A como el TCA9539 están instalados en la placa. El formato TSSOP de 24 pines también admite TCA6408A, TCA6416A, TCA9534, TCA9534A, (...)
Guía del usuario: PDF
Herramienta de diseño
I2C-DESIGNER — Herramienta de diseño I2C
Use the I2C Designer tool to quickly resolve conflicts in addressing, voltage level and frequency in I2C based designs. Enter master and slave inputs to automatically generate an I2C tree or easily build a custom solution. This tool will help designers save time and comply with the I2C standard (...)
Herramienta de simulación
PSPICE-FOR-TI — PSpice® para herramienta de diseño y simulación de TI
PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Herramienta de simulación
TINA-TI — Programa de simulación analógica basado en SPICE
TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
Guía del usuario: PDF
Diseños de referencia
TIDA-00426 — Diseño de referencia de placa BERT multicanal de 12 Gbps
This reference design is a 12-Gbps low-cost bit error tester (BERT) capable of generating and checking up to 8 channels of pseudo-random binary sequences (PRBS). This validated design is a convenient way to generate multi-channels high speed serial bit streams of up to 12-Gbps, and checking (...)
Diseños de referencia
TIDA-00609 — Sistema de audio de arranque automático
The purpose of this reference design is to provide hardware and software tools that can be used as reference for audio systems. The new revision of the PurePath™ Console Motherboard (Rev F) adds stand-alone self-booting capabilities to allow making compelling demos with any evaluation module (...)
Diseños de referencia
TIDA-00352 — Diseño de referencia de agregación de video SDI
This verified reference design is a complete four channel SDI aggregation and de-aggregation solution. One TLK10022 is used to aggregate four synchronous HD-SDI sources together into one 5.94 Gbps serial link. The serial data is transferred via copper or optical fiber where a second TLK10022 is (...)
| Encapsulado | Pines | Símbolos CAD, huellas y modelos 3D |
|---|---|---|
| UQFN (RGJ) | 32 | Ultra Librarian |
Pedidos y calidad
Información incluida:
- RoHS
- REACH
- Marcado del dispositivo
- Acabado de plomo/material de la bola
- Clasificación de nivel de sensibilidad a la humedad (MSL) / reflujo máximo
- Estimaciones de tiempo medio entre fallas (MTBF)/fallas en el tiempo (FIT)
- Contenido del material
- Resumen de calificaciones
- Monitoreo continuo de confiabilidad
Información incluida:
- Lugar de fabricación
- Lugar de ensamblaje
Los productos recomendados pueden tener parámetros, módulos de evaluación o diseños de referencia relacionados con este producto de TI.
Soporte y capacitación
Foros de TI E2E™ con asistencia técnica de los ingenieros de TI
El contenido lo proporcionan “tal como está” TI y los colaboradores de la comunidad y no constituye especificaciones de TI. Consulte los términos de uso.
Si tiene preguntas sobre la calidad, el paquete o el pedido de productos de TI, consulte el soporte de TI.