Overview
The ISO1541DR, produced by Texas Instruments, is a low-power, bidirectional I2C isolator designed to provide reliable and isolated communication between two different voltage domains. This device is part of the ISO154x family and is compatible with I2C interfaces, supporting up to 1-MHz operation. It features logic input and output buffers separated by Texas Instruments' Capacitive Isolation technology, ensuring high isolation and safety standards.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCC1, VCC2 | -0.5 | 6 | V | |
| SDA1, SCL1 | -0.5 | VCC1 + 0.5 | V | |
| SDA2, SCL2 | -0.5 | VCC2 + 0.5 | V | |
| IO Output current (SDA1, SCL1) | 0 | 20 | mA | |
| IO Output current (SDA2, SCL2) | 0 | 100 | mA | |
| TJ(MAX) Maximum junction temperature | 150 | °C | ||
| Tstg Storage temperature | -65 | 150 | °C | |
| Operating Temperature Range | -40 | 125 | °C | |
| Common-mode transient immunity (CMTI) | 25 | 50 | kV/µs |
Key Features
- 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 range
- ±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, 2500-VRMS isolation for 1 minute per UL 1577, CSA approval per IEC 62368-1, and CQC basic insulation per GB4943.1-2011
Applications
- Isolated I2C buses
- SMBus and PMBus interfaces
- Open-drain networks
- Motor control systems
- Battery management
- I2C level shifting
Q & A
- What is the ISO1541DR used for? The ISO1541DR is used for isolated bidirectional I2C communication, ensuring safe and reliable data transfer between different voltage domains.
- What is the operating frequency range of the ISO1541DR? The ISO1541DR supports up to 1-MHz operation.
- What is the supply voltage range for the ISO1541DR? The supply voltage range is from 3 V to 5.5 V.
- What are the key safety features of the ISO1541DR? The device features HBM ESD protection, transient immunity, and various safety-related certifications such as 4242-VPK isolation and CSA approval.
- What are the typical applications of the ISO1541DR? Typical applications include isolated I2C buses, SMBus and PMBus interfaces, open-drain networks, motor control systems, battery management, and I2C level shifting.
- What is the maximum junction temperature for the ISO1541DR? The maximum junction temperature is 150°C.
- What is the storage temperature range for the ISO1541DR? The storage temperature range is from -65°C to 150°C.
- Does the ISO1541DR have ESD protection? Yes, it has HBM ESD protection of 4 kV on all pins and 8 kV on bus pins.
- What type of isolation technology does the ISO1541DR use? The ISO1541DR uses Texas Instruments' Capacitive Isolation technology.
- What package type is the ISO1541DR available in? The ISO1541DR is available in an 8-pin SOIC package.
