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Data Sheet

FULL DATA SHEET (PDF, 800kB) Download   E-Mail

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 of the full data sheet.

Key Features

Communicates at regular and overdrive 1-Wire speeds Supports 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°C to +70°C operating temperature range

Application Notes

App Note 117: DS2490 Universal Serial Bus Descriptors - DS2490 App Note 148: Guidelines for Reliable 1-Wire Networks - DS2490 App Note 193: Extending 1-Wire Range with Network Proxies - DS2490 App Note 1740: White Paper 6: 1-Wire Drivers Installation Guide for Windows - DS2490 App Note 3358: OneWireViewer User's Guide - DS2490 App Note 3438: Serial Digital Data Networks - DS2490 App Note 3829: Determining the Recovery Time for Multiple-Slave 1-Wire Networks - DS2490 App Note 3874: Simple Characterization Circuit for Rechargeable AA Cells - DS2490 App Note 4206: Choosing the Right 1-Wire® Master for Embedded Applications - DS2490

Evaluation Kits

none

Design Guides

1-Wire® PRODUCTS (PDF)

Reliability Reports

Reliability Report: DS2490.pdf

Software/Models

none

Ordering Information
Notes: Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day. Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
Devices: 1-4 of 4
DS2490	Free Sample	Buy	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
DS2490S			SOIC;24 pin;118 mm² Dwg: 56-G4009-001B (PDF) Use pkgcode/variation: W24-4*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
DS2490Y			SOIC;24 pin;118 mm² Dwg: 56-G4009-001B (PDF) Use pkgcode/variation: W24-4*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
DS2490S+			SOIC;24 pin;118 mm² Dwg: 56-G4009-001B (PDF) Use pkgcode/variation: W24+4*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS2490S+T&R			SOIC;24 pin;118 mm² Dwg: 56-G4009-001B (PDF) Use pkgcode/variation: W24+4*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis

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