ISO1540DR Part Information

Details for ISO1540DR by Texas Instruments

Electronic & Electrical Components > Semiconductors - ICs > Driver & Interface ICs

Part Description

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 master while the ISO1540 is suitable for multimaster applications. For applications where clock stretching by the slave 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 highlevel input voltage on side 1, thus preventing an internal logic latch that otherwise would occur with standard digital isolators.

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Part Features

  • 3-V to 5.5-V Supply Range
  • HBM ESD Protection of 4 kV on All Pins; 8 kV on Bus Pins
  • Isolated Bidirectional, I2 C Compatible, Communication
  • Open-Drain Outputs With 3.5-mA Side 1 and 35- mA Side 2 Sink Current Capability
  • Safety-Related Certifications:
  • Supports up to 1-MHz Operation
  • u00b150-kV/u00b5s Transient Immunity (Typical)
  • u201340u00b0C to +125u00b0C Operating Temperature

Part Specifications

No. of Channels 2 Channel
Propagation Delay 70ns
Supply Voltage Min 3V
Supply Voltage Max 5.5V
Interface Case Style SOIC
No. of Pins 8Pins
Operating Temperature Min -40°C
Operating Temperature Max 125°C
Product Range -
Automotive Qualification Standard -
RoHS Phthalates Compliant Yes
MSL MSL 2 - 1 year
SVHC No SVHC (27-Jun-2018)
RoHS Compliant

Alternative Part Descriptions

  • DIGITAL ISOLATOR, 2-CH, 1MBPS, SOIC-8; No. of Channels:2 Channel; Propagation Delay:70ns; Supply Voltage Min:3V; Supply Voltage Max:5.5V; Interface Case Style:SOIC; No. of Pins:8Pins; Operating Temperature Min:-40°C; Operating RoHS Compliant: Yes | Newark Electronics
  • 2.5-kVrms, isolated bidirectional clock, bidirectional I2C isolator | Texas Instruments

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