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DS2490
USB to 1-Wire Bridge Chip
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Status
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Status |
Explanation |
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DS2490
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This product is Not Recommended for New Designs. Some versions may be
No Longer Available or being discontinued and subject to Last Time
Buy, after which new orders can not be placed. See Ordering
Information for details.
| The DS2490 remains available but is not recommended for new designs. The DS2480B and DS2482S-100 alternatively provide either UART/RS-232 or I²C to 1-Wire interface solutions. |
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.
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Data Sheet
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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
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Application Notes
Product Guides
Reliability Reports
Software/Models
Ordering Information
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Part Number
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Free
Sample |
Buy |
Status
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Recommended Replacement |
Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
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Temp |
RoHS/Lead-Free?
Materials Analysis
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| DS2490S
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N/A |
No Longer Available |
DS2490S+
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SOIC(W);24 pin;164.3 mm²
Outline Drawing:21-0042 (PDF)
Land Pattern: 90-0182 (PDF)
Use pkgcode/variation: W24-4*
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0°C to +70°C
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RoHS/Lead-Free: No
Materials Analysis |
| DS2490S+
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NRND |
DS2480B
DS2482S-100
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SOIC(W);24 pin;164.3 mm²
Outline Drawing:21-0042 (PDF)
Land Pattern: 90-0182 (PDF)
Use pkgcode/variation: W24+4*
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0°C to +70°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| DS2490S+T&R
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NRND |
DS2480B
DS2482S-100
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SOIC(W);24 pin;164.3 mm²
Outline Drawing:21-0042 (PDF)
Land Pattern: 90-0182 (PDF)
Use pkgcode/variation: W24+4*
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0°C to +70°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| DS2490X/T&R
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N/A |
No Longer Available |
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BUMP;
Land Pattern: Not Available
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0°C to +70°C
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See data sheet
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| DS2490Y
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N/A |
No Longer Available |
DS2490S+T&R
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SOIC(W);24 pin;164.3 mm²
Outline Drawing:21-0042 (PDF)
Land Pattern: 90-0182 (PDF)
Use pkgcode/variation: W24-4*
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0°C to +70°C
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RoHS/Lead-Free: No
Materials Analysis |
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; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product 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.
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Didn't Find What You Need?
Information Index
Document Ref.: 19-4993
Rev 4;
2009-11-04
This page last modified: 2009-11-04
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