ISO1540-Q1 Datasheet | Texas Instruments

Features - Qualified for automotive applications - AEC-Q100 qualified with the following results: - Device temperature grade 1: - 40°C to +125°C ambient operating temperature - Device HBM ESD classification level 3A - Device CDM ESD classification level C6 - Functional Safety-Capable - Documentation available to aid functional safety system design: ISO1540-Q1, ISO1541-Q1 - Isolated bidirectional, I2C patible, munication - Supports up to 1-MHz operation - 3-V to 5.5-V supply range - Open-drain outputs With 3.5-m A Side 1 and 35- m A Side 2 sink current capability - ±50-k V/µs transient immunity (Typical) - 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 2 Applications - Electric and hybrid-electric vehicles - Isolated I2C buses - SMBus and PMBus interfaces - Open-drain networks - Motor control systems - Battery management - I2C level shifting 3 Description The ISO1540-Q1 and ISO1541-Q1 devices are lowpower, bidirectional isolators that are patible with I2C interfaces. These devices have logic input and output buffers that are separated by Texas Instruments Capacitive Isolation technology using a silicon dioxide (Si O2) 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 pared to optocouplers. The ISO1540-Q1 and ISO1541-Q1 devices enable a plete isolated I2C interface to be implemented within a small form factor. The ISO1540-Q1 has two isolated bidirectional channels for clock and data lines while the ISO1541Q1 has a bidirectional data and a unidirectional clock channel. The ISO1541-Q1 is useful in applications that have a...