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TCA9543A

ACTIVO

Interruptor I2C/SMBus de 1.65 V a 5.5 V de 2 canales con interrupción, restablecimiento y traducción

Detalles del producto

Addresses 4 Supply voltage (max) (V) 5.5 Supply voltage (min) (V) 1.65 Features Interrupt pin, Reset pin Rating Catalog Frequency (max) (MHz) 0.4 Operating temperature range (°C) -40 to 85 Number of channels 2
Addresses 4 Supply voltage (max) (V) 5.5 Supply voltage (min) (V) 1.65 Features Interrupt pin, Reset pin Rating Catalog Frequency (max) (MHz) 0.4 Operating temperature range (°C) -40 to 85 Number of channels 2
SOIC (D) 14 51.9 mm² 8.65 x 6 TSSOP (PW) 14 32 mm² 5 x 6.4
  • 1-of-2 Bidirectional Translating Switches
  • I2C Bus and SMBus Compatible
  • Two active-low interrupt inputs
  • Active-low interrupt output
  • Active-low reset input
  • Two address pins allowing up to four TCA9543A 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 JESD78
  • ESD Protection exceeds JESD 22
    • 4000-V Human-body model (A114-A)
    • 1500-V Charged-device model (C101)
  • 1-of-2 Bidirectional Translating Switches
  • I2C Bus and SMBus Compatible
  • Two active-low interrupt inputs
  • Active-low interrupt output
  • Active-low reset input
  • Two address pins allowing up to four TCA9543A 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 JESD78
  • ESD Protection exceeds JESD 22
    • 4000-V Human-body model (A114-A)
    • 1500-V Charged-device model (C101)

The TCA9543A is a dual bidirectional translating switch controlled by the I2C bus. The SCL/SDA upstream pair fans out to two downstream pairs, or channels. Either individual SCn/SDn channel or both channels can be selected, determined by the contents of the programmable control register. Two interrupt inputs (INT1INT0), one for each of the downstream pairs, are provided. One interrupt output (INT) acts as an AND of the two interrupt inputs.

An active-low reset (RESET) input allows the TCA9543A to recover from a situation where one of the downstream I2C buses is stuck in a low state. Pulling RESET low resets the I2C state machine and causes both of 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 terminal can be used to limit the maximum high voltage, which will be passed by the TCA9543A. 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 terminals are 5.5-V tolerant.

The TCA9543A is a dual bidirectional translating switch controlled by the I2C bus. The SCL/SDA upstream pair fans out to two downstream pairs, or channels. Either individual SCn/SDn channel or both channels can be selected, determined by the contents of the programmable control register. Two interrupt inputs (INT1INT0), one for each of the downstream pairs, are provided. One interrupt output (INT) acts as an AND of the two interrupt inputs.

An active-low reset (RESET) input allows the TCA9543A to recover from a situation where one of the downstream I2C buses is stuck in a low state. Pulling RESET low resets the I2C state machine and causes both of 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 terminal can be used to limit the maximum high voltage, which will be passed by the TCA9543A. 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 terminals are 5.5-V tolerant.

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Documentación técnica

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Tipo Título Fecha
* Data sheet TCA9543A Low Voltage 2-Channel I2C Bus Switch With Interrupt Logic And Reset datasheet (Rev. B) PDF | HTML 29 oct 2019
Application brief Best Practices: I2C Devices on an I3C Shared Bus PDF | HTML 30 mar 2023
Application note I2C Solutions for Hot Swap Applications (Rev. A) 31 ene 2023
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 Maximum Clock Frequency of I2C Bus Using Repeaters 15 may 2015
Application note I2C Bus Pull-Up Resistor Calculation PDF | HTML 13 feb 2015

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

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Guía del usuario: PDF
Modelo de simulación

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SCPM032.ZIP (77 KB) - IBIS Model
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Guía del usuario: PDF
Encapsulado Pines Símbolos CAD, huellas y modelos 3D
SOIC (D) 14 Ultra Librarian
TSSOP (PW) 14 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

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