ISO1540

ACTIVO

Reloj bidireccional aislado de 2.5 kVrms y aislador bidireccional I2C

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ISO1640 ACTIVO Aislador I2C bidireccional intercambiable en caliente con EMC robusto y reloj bidireccional Pin-to-pin upgrade with hot-swap capability and improved EMC

Detalles del producto

Rating Catalog Isolation rating Basic Number of channels 2 Serial data Bidirectional Serial clock Bidirectional Data rate (max) (Mbps) 1 Working isolation voltage (VIOWM) (Vrms) 400 Surge isolation voltage (VIOSM) (VPK) 4000 Transient isolation voltage (VIOTM) (VPK) 4242 Withstand isolation voltage (VISO) (Vrms) 2500 CMTI (min) (kV/µs) 25 Supply voltage (max) (V) 5.5 Supply voltage (min) (V) 3 Operating temperature range (°C) -40 to 125
Rating Catalog Isolation rating Basic Number of channels 2 Serial data Bidirectional Serial clock Bidirectional Data rate (max) (Mbps) 1 Working isolation voltage (VIOWM) (Vrms) 400 Surge isolation voltage (VIOSM) (VPK) 4000 Transient isolation voltage (VIOTM) (VPK) 4242 Withstand isolation voltage (VISO) (Vrms) 2500 CMTI (min) (kV/µs) 25 Supply voltage (max) (V) 5.5 Supply voltage (min) (V) 3 Operating temperature range (°C) -40 to 125
SOIC (D) 8 29.4 mm² 4.9 x 6
  • Isolated bidirectional, I2C compatible, communication
  • Supports up to 1-MHz operation
  • 3-V to 5.5-V supply range
  • Open-drain outputs With 3.5-mA Side 1 and 35-mA Side 2 sink current capability
  • –40°C to +125°C operating temperature
  • ±50-kV/µs transient immunity (Typical)
  • HBM ESD protection of 4 kV on all pins; 8 kV on bus pins
  • Safety-related certifications:
    • 4242-VPK isolation per DIN EN IEC 60747-17 (VDE 0884-17)
    • 2500-VRMS isolation for 1 minute per UL 1577
    • CSA approval per IEC 62368-1 end equipment standard
    • CQC basic insulation per GB4943.1-2011
  • Isolated bidirectional, I2C compatible, communication
  • Supports up to 1-MHz operation
  • 3-V to 5.5-V supply range
  • Open-drain outputs With 3.5-mA Side 1 and 35-mA Side 2 sink current capability
  • –40°C to +125°C operating temperature
  • ±50-kV/µs transient immunity (Typical)
  • HBM ESD protection of 4 kV on all pins; 8 kV on bus pins
  • Safety-related certifications:
    • 4242-VPK isolation per DIN EN IEC 60747-17 (VDE 0884-17)
    • 2500-VRMS isolation for 1 minute per UL 1577
    • CSA approval per IEC 62368-1 end equipment standard
    • CQC basic insulation per GB4943.1-2011

The ISO1540 and ISO1541 devices are low-power, bidirectional isolators that are compatible with I2C interfaces. These devices have logic input and output buffers that are separated by Texas Instruments Capacitive Isolation technology using a silicon dioxide (SiO2) barrier. When used with isolated power supplies, these devices block high voltages, isolate grounds, and prevent noise currents from entering the local ground and interfering with or damaging sensitive circuitry.

This isolation technology provides for function, performance, size, and power consumption advantages when compared to optocouplers. The ISO1540 and ISO1541 devices enable a complete isolated I2C interface to be implemented within a small form factor.

The ISO1540 has two isolated bidirectional channels for clock and data lines while the ISO1541 has a bidirectional data and a unidirectional clock channel. The ISO1541 is useful in applications that have a single controller while the ISO1540 is suitable for multi-controller applications. For applications where clock stretching by the target is possible, the ISO1540 device should be used.

Isolated bidirectional communication is accomplished within these devices by offsetting the low-level output voltage on side 1 to a value greater than the high-level input voltage on side 1, thus preventing an internal logic latch that otherwise would occur with standard digital isolators.

The ISO1540 and ISO1541 devices are low-power, bidirectional isolators that are compatible with I2C interfaces. These devices have logic input and output buffers that are separated by Texas Instruments Capacitive Isolation technology using a silicon dioxide (SiO2) barrier. When used with isolated power supplies, these devices block high voltages, isolate grounds, and prevent noise currents from entering the local ground and interfering with or damaging sensitive circuitry.

This isolation technology provides for function, performance, size, and power consumption advantages when compared to optocouplers. The ISO1540 and ISO1541 devices enable a complete isolated I2C interface to be implemented within a small form factor.

The ISO1540 has two isolated bidirectional channels for clock and data lines while the ISO1541 has a bidirectional data and a unidirectional clock channel. The ISO1541 is useful in applications that have a single controller while the ISO1540 is suitable for multi-controller applications. For applications where clock stretching by the target is possible, the ISO1540 device should be used.

Isolated bidirectional communication is accomplished within these devices by offsetting the low-level output voltage on side 1 to a value greater than the high-level input voltage on side 1, thus preventing an internal logic latch that otherwise would occur with standard digital isolators.

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Documentación técnica

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Tipo Título Fecha
* Data sheet ISO154x Low-Power Bidirectional I2C Isolators datasheet (Rev. F) PDF | HTML 04 abr 2022
Application note Understanding Transient Drive Strength vs. DC Drive Strength in Level-Shifters (Rev. A) PDF | HTML 03 jul 2024
Certificate VDE Certificate for Basic Isolation for DIN EN IEC 60747-17 (Rev. W) 31 ene 2024
Product overview Isolating I2C Signals (Rev. A) PDF | HTML 01 sep 2023
Certificate CSA Certificate for ISO154xD 14 mar 2023
Certificate CQC Certificate for ISO154xD, ISO742xD, ISO71xxDBQ (Rev. A) 07 feb 2023
Certificate UL Certificate of Compliance File E181974 Vol 4 Sec 3 08 ago 2022
User guide ISO154xEVM_UserGuide (Rev. A) PDF | HTML 28 jun 2022
Application brief How Do Isolated I2C Buffers with Hot-Swap Capability and IEC ESD Improve ... (Rev. A) PDF | HTML 03 mar 2022
White paper Why are Digital Isolators Certified to Meet Electrical Equipment Standards? 16 nov 2021
White paper Distance Through Insulation: How Digital Isolators Meet Certification Requiremen PDF | HTML 11 jun 2021
Technical article Top 6 design questions about I2C isolators PDF | HTML 13 mar 2019
Analog Design Journal Designing an Isolated I2C Bus interface by using digital isolators (Rev. A) 13 mar 2018

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

ISO154XEVM — Módulo de evaluación ISO154xEVM

The ISO154xEVM Evaluation Module has been designed to allow the user to evaluate the electrical parameter performance and features of TI's ISO154x family of 3kV I2C isolators which are based on TI's capacitive isolation technology. The ISO154xEVM Evaluation Module provides for the evaluation of:

(...)
Guía del usuario: PDF | HTML
Tarjeta secundaria

MSP-ISO — Adaptador de aislamiento para kits de desarrollo LaunchPad MSP

The MSP-ISO Isolation board is an easy-to-use plug-in module that offers galvanic isolation between the Debug and Target circuits for MSP430 LaunchPad developers. This is important in cases where the debug circuitry may adversely affect the quality of analog signal measurements made by the MSP430 (...)

Guía del usuario: PDF
Modelo de simulación

ISO1540 IBIS Model

SLLM189.ZIP (31 KB) - IBIS Model
Diseños de referencia

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The TIDA-00018 reference design enables faster development of high precision temperature measurement solutions using 24-Bit delta-sigma ADC and most widely used temperature sensors like thermocouple and RTD. The design guide will address the sensor signal conditioning, thermocouple cold junction (...)
Design guide: PDF
Esquema: PDF
Encapsulado Pines Símbolos CAD, huellas y modelos 3D
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Pedidos y calidad

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  • 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
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  • Lugar de fabricación
  • Lugar de ensamblaje

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