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Status
Part Number	Status	Explanation
DS2490	This product is Not Recommended for New Designs. See Ordering Information for recommended replacements.	The DS2490 remains available but is not recommended for new designs. The DS2480B and DS2482S-100 alternatively provide either UART/RS232 or I2C to 1-Wire interface solutions.

Data Sheet

FULL DATA SHEET (PDF, 1.3MB) 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

Application Note 148: Guidelines for Reliable Long Line 1-Wire® Networks - DS2490 Application Note 193: Extending 1-Wire® Range with Network Proxies - DS2490 Application Note 1097: White Paper 2: Using the 1-Wire® Public Domain Kit - DS2490 Application Note 1740: White Paper 6: 1-Wire Drivers Installation Guide for Windows - DS2490 Application Note 3358: OneWireViewer User's Guide, Version 1.4 - DS2490 Application Note 3438: Serial Digital Data Networks - DS2490 Application Note 3829: Determining the Recovery Time for Multiple-Slave 1-Wire Networks - DS2490 Application Note 3874: Simple Characterization Circuit for Rechargeable AA Cells - DS2490 Application Note 4206: Choosing the Right 1-Wire® Master for Embedded Applications - DS2490

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: 1-5 of 5

DS2490	Free Sample	Buy	Status	Recommended Replacement	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
DS2490X/T&R		N/A	No Longer Available		Land Pattern: Not Available	0°C to +70°C	See data sheet
DS2490S		N/A	No Longer Available	DS2490S+	SOIC(W);24 pin;164 mm² Outline Drawing: 21-0042 (PDF) Land Pattern: 90-0182 (PDF) Use pkgcode/variation: W24-4*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
DS2490Y		N/A	No Longer Available	DS2490S+	SOIC(W);24 pin;164 mm² Outline Drawing: 21-0042 (PDF) Land Pattern: 90-0182 (PDF) Use pkgcode/variation: W24-4*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
DS2490S+			NRND	DS2480B DS2482S-100	SOIC(W);24 pin;164 mm² Outline Drawing: 21-0042 (PDF) Land Pattern: 90-0182 (PDF) Use pkgcode/variation: W24+4*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS2490S+T&R			NRND	DS2480B DS2482S-100	SOIC(W);24 pin;164 mm² Outline Drawing: 21-0042 (PDF) Land Pattern: 90-0182 (PDF) Use pkgcode/variation: W24+4*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis

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