DS2490S+

Specialized Overview

The DS2490S+ is a USB to 1-Wire bridge chip enabling communication between a USB host system and a 1-Wire bus. It supports regular, overdrive, and flexible 1-Wire speeds with a full-speed 12Mbps USB interface. The device features an integrated USB-compliant transceiver and supports USB remote wake-up from a 1-Wire device event. Operating temperature range is 0°C to +70°C. Supply voltages are VD at 5.0V ±10% for digital/1-Wire functions and VB at 3.3V ±10% for USB functions. It utilizes a 12.0 MHz crystal oscillator for precise timing.

Specialized Feature Summary

• Active pullup circuitry shapes rising edges to reduce rise time and ringing on long lines.
• Programmable slew rate control accommodates various 1-Wire network configurations.
• Supports stiff 5V pullup for EEPROM, sensors, and crypto iButton devices.
• Crystal oscillator timebase provides precision timed 1-Wire waveforms.

Specialized Applications

• USB to 1-Wire adapter peripherals
• Embedded host computer interfaces
• USB hub integration

Specialized Procurement Notes

Verify the component matches the specific package type and operating temperature range required for your design. Confirm that the supplier provides documentation confirming RoHS compliance and lead-free status as indicated by the plus suffix. Ensure the ordering information aligns with your preferred packaging format, such as tube or tape and reel, before finalizing purchase orders.

Specialized Selection Notes

Select this component when interfacing a USB host with 1-Wire networks requiring precise timing control. Consider the 0°C to +70°C operating range for environmental suitability. Evaluate the need for active pullup and programmable slew rates if deploying long network lines. Verify compatibility with the host system's USB driver capabilities for vendor-specific commands.

Specialized Part Context

The DS2490S+ belongs to the DS2490 family of USB to 1-Wire bridge chips manufactured by Analog Devices Inc./Maxim Integrated. It serves as a hardware bridge allowing standard USB hosts to communicate with 1-Wire slave devices. The 'S+' designation indicates a lead-free, RoHS-compliant version packaged in a 24-pin SOIC (300 mil) format.

Specialized Replacement Considerations

DS2490S