ISO1541 Bi-directional I²C Isolators

Texas Instruments' low-power, bi-directional isolators are compatible with I²C interfaces

Texas Instruments ISO1541 Bi-directional I²C Isolators Texas Instruments' ISO1541 is a low-power, bi-directional isolator that is compatible with I²C interfaces. These devices have their logic input and output buffers separated by TI's capacitive isolation technology using a silicon dioxide (SiO2) barrier. When used in conjunction 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 opto-couplers. The ISO1541 enables a complete isolated I²C interface to be implemented within a small form factor.

Features Applications
  • Isolated bidirectional, I²C compatible, communications
  • 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
  • Isolated I²C, SMBus, PMBus interfaces
  • Level shifting and hot swap applications
  • Power over Ethernet
  • Power supplies
  • Battery management

Buy Now
Part Number
Texas Instruments
Part Number
Packaging Description  
296-34872-2-ND ISO1541DR Tape & Reel ISOL BIDIR I2C LP 8SOIC ISO1541 Datasheet
296-34872-1-ND Cut Tape
296-34872-6-ND Digi-Reel®
296-34895-5-ND ISO1541D Tube

Evaluation Module
Part Number
Texas Instruments
Part Number
296-34835-ND ISO154XEVM EVAL MODULE FOR ISO154X ISO154X User's Guide