DS2490S

Maximum Power Dissipation :
Mounting Style : SMD/SMT
Maximum Operating Temperature : + 70 C
Operating Supply Voltage : 3.3 V, 5 V
Product Type : USB to 1-Wire Bridge
Supply Current : 7 mA, 20 mA
Package / Case : SOIC-24 Wide


Features:

` Communicates at regular and overdrive 1- Wire® speeds
` Supports 12V EPROM programming and stiff 5V pullup for EEPROM, sensors, and crypto iButton®
` Slew rate controlled 1-Wire timing and active pullup to accommodate long 1-Wire network lines and reduce radiation
` Programmable 1-Wire timing and driver characteristics accommodate a wide range of 1-Wire network configurations
` Low- to high-level command types, including macros, for generating 1-Wire communication
` Crystal oscillator timebase provides precision timed 1-Wire waveforms
` High-speed 12Mbps Universal Serial Bus (USB) interface
` Integrated USB-compliant transceiver
` Supports USB remote wake-up from a 1-Wire device event to resume a suspended host system
` 0 to +70 operating temperature range


Pinout




Specifications

Voltage on Any Pin Relative to Ground ..............-0.5V to +6.0V
Operating Temperature Range........................... 0 to +70
Storage Temperature Range .........................-55 to +125
Soldering Temperature ...............See J-STD-020A Specification


Description

The DS2490 is a bridge chip that enables communication between a USB host system and a 1-Wire bus. It provides regular, overdrive, and flexible 1-Wire communication speeds and a full-speed 12Mbps connection to USB. USB vendor-specific commands defined in this specification are used to control the DS2490 and communicate with attached 1-Wire devices. A functional block diagram of the DS2490 is shown in Figure 1.