DS1820 Digital Thermometer Replacements

DS1820 No Longer Available: Use Recommended Replacements

Status

Part Number	Status	Replacement	Explanation
DS1820	This product is Not Recommended for New Designs.	DS18S20	Architecture: The DS18S20 uses a bandgap temperature sensing architecture rather than the dual-oscillator architecture used by the DS1820. This architectural difference is invisible to the user. Specification Differences: The primary specification difference between the two parts is the temperature conversion time: DS1820 = 500ms (max) and DS18S20 = 750ms (max). Software Compatibility: The DS18S20 is software compatible with the DS1820 in most applications. Hardware Compatibility: The DS18S20 is available in TO92 (DS18S20) and 8-pin SOIC (DS18S20Z) packages. The DS18S20 (TO92 package) replaces the DS1820 (PR35 package) since both packages are 3-pin packages with the same lead pitch. There is no replacement package for the DS1820S (16-pin SSOP); however, the DS18S20Z (8-pin SOIC) provides a smaller surface mount package option.

Application Note 122		Using Dallas' 1-Wire ICs in 1-Cell Li-Ion Battery Packs With Low-Side N-Channel Safety FETs Master
Application Note 198		Networked Temperature Monitoring
Application Note 4377		Comparison of the DS18B20 and DS18S20 1-Wire® Digital Thermometers

Reliability Report:

none

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Tape and Reel

Sample

This product cannot be purchased through our web site. Contact factory for availability.

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.

1-Wire Parasite-Power Digital Thermometer

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Rev 1; 2001-04-30
This page last modified: 2007-12-18