Low-Voltage, 1.8kHz PWM Output Temperature Sensors

Industry's Lowest Voltage PWM Output Temperature Sensor in Tiny SOT23 Package

Overview

Technical Documents

Ordering Info

Status

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.

Description

The MAX6676/MAX6677 are high-accuracy, low-power temperature sensors with a single-wire output. The MAX6676/MAX6677 convert the ambient temperature into a ratiometric PWM output with temperature information contained in the duty cycle of the output square wave. The MAX6676 has an open-drain output and the MAX6677 has a push-pull output.

The MAX6676/MAX6677 are specified for operation with power-supply voltages from 1.8V to 3.6V, or from 3.6V to 5.5V (MAX6676 only). The typical unloaded supply current is 80µA. All devices feature a single-wire output that minimizes the number of pins necessary to interface with a microprocessor (µP). The output is a square wave with a nominal frequency of 1.8kHz (±20%) at +25°C. The output format is decoded as follows:

Temperature (°C) = 398.15 x (t₁ / t₂) - 273.15

Where t₁ is fixed with a typical value of 0.24ms and t₂ is modulated by the temperature. The MAX6676/ MAX6677 operate from -40°C to +125°C and are available in space-saving 6-pin SOT23 packages.

Data Sheet

Download	Rev 1	(PDF, 176kB)
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Key Features

Simple Single-Wire, 1.8kHz PWM Output
Operates Down to 1.8V
High Accuracy
- ±1.5°C at T_A= +25°C
- ±3.0°C at T_A = 0°C to +85°C
Operates from -40°C to +125°C
Low 80µA Typical Current Consumption
Small 6-Pin SOT23 Package

Applications/Uses

Automotive
HVAC and Environmental Control
Industrial
Isolated Temperature Sensing
Portable Devices
Process Control
µP and µC Temperature Monitoring

Diagram

Pin Configuration

Product Guides

Thermal Management (PDF)

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Tape and Reel

Sample

Part Number	Free Sample	Buy	Status	Recommended Replacement	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX6676AUT+T		N/A	No Longer Available	MAX6672AXK+T	SOT; Land Pattern: Not Available	-40°C to +125°C	See data sheet
MAX6676AUT3+			Last Time Buy	MAX6672AXK+	SOT;6 pin;9 mm² Outline Drawing:21-0058 (PDF) Land Pattern: 90-0175 (PDF) Use pkgcode/variation: U6+1*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX6676AUT3+T			Last Time Buy	MAX6672AXK+T	SOT;6 pin;9 mm² Outline Drawing:21-0058 (PDF) Land Pattern: 90-0175 (PDF) Use pkgcode/variation: U6+1*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX6676AUT3-T		N/A	No Longer Available	MAX6672AXK+T	SOT;6 pin;9 mm² Outline Drawing:21-0058 (PDF) Land Pattern: 90-0175 (PDF) Use pkgcode/variation: U6-1*	-40°C to +125°C	RoHS/Lead-Free: No Materials Analysis
MAX6676AUT5+T		N/A	No Longer Available	MAX6672AXK+T	SOT;6 pin;9 mm² Outline Drawing:21-0058 (PDF) Land Pattern: 90-0175 (PDF) Use pkgcode/variation: U6+1*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX6676AUT5-T		N/A	No Longer Available	MAX6672AXK+T	SOT;6 pin;9 mm² Outline Drawing:21-0058 (PDF) Land Pattern: 90-0175 (PDF) Use pkgcode/variation: U6-1*	-40°C to +125°C	RoHS/Lead-Free: No Materials Analysis
MAX6677AUT3			Last Time Buy	MAX6673AXK+	SOT;6 pin;9 mm² Outline Drawing:21-0058 (PDF) Land Pattern: 90-0175 (PDF) Use pkgcode/variation: U6-1*	-40°C to +125°C	RoHS/Lead-Free: No Materials Analysis
MAX6677AUT3+T		N/A	No Longer Available	MAX6673AXK+T	SOT; Land Pattern: Not Available	-40°C to +125°C	See data sheet
MAX6677AUT3-T		N/A	No Longer Available	MAX6673AXK+T	SOT;6 pin;9 mm² Outline Drawing:21-0058 (PDF) Land Pattern: 90-0175 (PDF) Use pkgcode/variation: U6-1*	-40°C to +125°C	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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More Information

Topmark Coding	MAX6676
Topmark Coding	MAX6677
New Product Press Release	[ 2002-11-25 ]
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Document Ref.: 19-2660 Rev 1; 2003-02-25
This page last modified: 2009-10-14