DS2490 View Datasheet(PDF) - Dallas Semiconductor -> Maxim Integrated

Part Name

Description

Manufacturer

DS2490

USB to 1-WireTM Bridge Chip

Dallas Semiconductor -> Maxim Integrated 

www.dalsemi.com

PRELIMINARY

DS2490

USB to 1-WireTM Bridge Chip

FEATURES

§ Communicates at regular and Overdrive 1-

Wire speeds

§ Supports 12V EPROM programming and stiff

5V pullup for crypto iButton, sensors and

EEPROM

§ Slew rate controlled 1-Wire timing and active

pullup to accommodate long lines and reduce

radiation

§ Programmable 1-Wire timing and driver

characteristics accommodate a wide range of

MicroLAN configurations at regular speed

§ Smart 1-Wire protocol combines data and

control information without requiring extra

pins

§ High-speed 12 Mbps USB interface

§ Integrated USB-compliant transceiver

§ Supports USB remote wakeup to resume a

suspended host system

PIN ASSIGNMENT

16-Pin SOIC

300-Mil

ORDERING INFORMATION

DS2490S 16-Pin SOIC

DESCRIPTION

The DS2490 is a bridge chip that enables communication between the Universal Serial Bus (USB) and a

1-Wire bus. It provides regular, overdrive and flexible 1-Wire communication speeds and a full-speed 12

Mbps 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.

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