DS2490 Overview
The DS2490 is a bridge chip that enables munication between a USB host system and a 1-Wire bus. It provides regular, overdrive, and flexible 1-Wire munication speeds and a full-speed 12Mbps connection to USB. USB vendor-specific mands defined in this specification are used to control the DS2490 and municate with attached 1-Wire devices.
DS2490 Key Features
- municates at regular and overdrive 1Wire® speeds
- Supports stiff 5V pullup for EEPROM, sensors, and crypto iButton®
- Slew rate controlled 1-Wire timing and active pullup to acmodate long 1-Wire network lines and reduce radiation
- Programmable 1-Wire timing and driver characteristics acmodate a wide range of 1-Wire network configurations
- Low- to high-level mand types, including macros, for generating 1-Wire munication
- Crystal oscillator timebase provides precision timed 1-Wire waveforms
- High-speed 12Mbps Universal Serial Bus (USB) interface
- Integrated USB-pliant transceiver
- Supports USB remote wake-up from a 1-Wire
- 0oC to +70oC operating temperature range