DS1631AU

DS1631AU Datasheet

DS1631 and DS1631A Provide ±0.5°C

Part	Datasheet
DS1631AU	DS1631AU (pdf)

Related Parts	Information
DS1631AU/T&R	DS1631AU/T&R

PDF Datasheet Preview
DS1631 and DS1631A Provide ±0.5°C Accuracy over a 0°C to +70°C Range DS1731 Provides ±1°C Accuracy over a -10°C to +85°C Range DS1631A Automatically Begins Taking Temperature Measurements at Power-Up Operating Temperature Range -55°C to +125°C -67°F to +257°F Temperature Measurements Require No External Components Output Resolution is User-Selectable to 9, 10, 11, or 12 Bits Wide Power-Supply Range +2.7V to +5.5V Converts Temperature-to-Digital Word in 750ms max Multidrop Capability Simplifies Distributed Temperature-Sensing Applications Thermostatic Settings are User-Definable and Nonvolatile NV Data is Read/Written Through 2-Wire Serial Interface SDA and SCL Pins All Three Devices are Available in 8-Pin uSOP Packages and the DS1631 is Also Available in a 150mil SO Table 1 for Ordering Information DS1631/DS1631A/DS1731 High-Precision Digital Thermometer and Thermostat PIN CONFIGURATIONS SDA 1 SCL 2 TOUT GND 4 uSOP DS1631U+, DS1631AU+, DS1731U+ SDA 1 8 VDD SCL 2 TOUT GND 4 7 A0 6 A1 5 A2 SO 150mil and 208mil DS1631Z+, DS1631S+ See Table 2 for Pin Descriptions Network Routers and Switches Cellular Base Stations Portable Products Any Space-Constrained Thermally Sensitive Product The DS1631, DS1631A, and DS1731 digital thermometers provide 9, 10, 11, or 12-bit temperature readings over a -55°C to +125°C range. The DS1631 and DS1631A thermometer accuracy is ±0.5°C from 0°C to +70°C with 3.0V VDD 5.5V, and the DS1731 accuracy is ±1°C from -10°C to +85°C with 3.0V VDD 5.5V. The thermostat on all three devices provides custom hysteresis with user-defined trip points TH and TL . The TH and TL registers and thermometer configuration settings are stored in NV EEPROM so they can be programmed prior to installation. In addition, the DS1631A automatically begins taking temperature measurements at power-up, which allows it to function as a stand-alone thermostat. Communication with the DS1631/DS1631A/DS1731 is achieved through a 2-wire serial interface, and three address pins allow up to eight devices to be multidropped on the same 2-wire bus. Pin descriptions for the DS1631/DS1631A/DS1731 are provided in Table 2 and user-accessible registers are summarized in Table A functional diagram is shown in Figure 1 of 15 102307 DS1631/DS1631A/DS1731 Table ORDERING INFORMATION ORDERING NUMBER DS1631U+ DS1631U+T&R DS1631Z+ DS1631Z+T&R DS1631AU+ DS1631AU+T&R DS1631S+ DS1631S+T&R DS1631+ DS1731U+ DS1731U+T&R DS1631U/T&R DS1631Z/T&R DS1631AU/T&R DS1631S DS1631S/T&R DS1631 DS1731U/T&R PACKAGE MARKING D1631 See Note D1631 See Note DS1631Z See Note DS1631Z See Note 1631A See Note 1631A See Note DS1631S See Note DS1631S See Note DS1631 See Note D1731 See Note D1731 See Note D1631 DS1631Z 1631A DS1631S DS1631S DS1631 D1731 DS1631 in Lead-Free 8-Pin uSOP DS1631 in Lead-Free 8-Pin uSOP, 3000 Piece Tape-andReel DS1631 in Lead-Free 150 mil 8-Pin SO DS1631 in Lead-Free 150 mil 8-Pin SO, 2500 Piece Tapeand-Reel DS1631A in Lead-Free 8-Pin uSOP DS1631A in Lead-Free 8-Pin uSOP, 3000 Piece Tape-andReel DS1631 in Lead-Free 208 mil 8-Pin SO DS1631 in Lead-Free 208 mil 8-Pin SO, 2000 Piece Tapeand-Reel DS1631 in Lead-Free 300 mil 8-Pin DIP DS1731 in Lead-Free 8-Pin uSOP DS1731 in Lead-Free 8-Pin uSOP, 3000 Piece Tape-andReel DS1631 in 8-Pin uSOP DS1631 in 8-Pin uSOP, 3000-Piece Tape-and-Reel DS1631 in 150mil 8-Pin SO DS1631 in 150mil 8-Pin SO, 2500-Piece Tape-and-Reel DS1631A in 8-Pin uSOP DS1631A in 8-Pin uSOP, 3000-Piece Tape-and-Reel DS1631 in 208 mil 8-Pin SO DS1631 in Lead-Free 208 mil 8-Pin SO, 2000 Piece Tapeand-Reel DS1631 in 300 mil 8-Pin DIP DS1731 in 8-Pin uSOP DS1731 in 8-Pin uSOP, 3000-Piece Tape-and-Reel Note A "+" symbol will also be marked on the package near the Pin 1 indicator Table DETAILED PIN DESCRIPTION PIN SYMBOL SDA Data Input/Output Pin for 2-Wire Serial Communication Port. Open-Drain. SCL Clock Input Pin for 2-Wire Serial Communication Port. TOUT Thermostat Output Pin. Push-Pull. GND Ground Pin Address Input Pin Address Input Pin Address Input Pin Supply Voltage Pin. +2.7V to +5.5V Power-Supply Pin. 2 of 15 Figure FUNCTIONAL DIAGRAM

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DS1631 and DS1631A Provide ±0.5°C

Accuracy over a 0°C to +70°C Range DS1731 Provides ±1°C Accuracy over a
-10°C to +85°C Range DS1631A Automatically Begins Taking

Temperature Measurements at Power-Up Operating Temperature Range -55°C to
+125°C -67°F to +257°F Temperature Measurements Require No

External Components Output Resolution is User-Selectable to 9,
10, 11, or 12 Bits Wide Power-Supply Range +2.7V to +5.5V Converts Temperature-to-Digital Word in
750ms max Multidrop Capability Simplifies Distributed

Temperature-Sensing Applications Thermostatic Settings are User-Definable
and Nonvolatile NV Data is Read/Written Through 2-Wire Serial

Interface SDA and SCL Pins All Three Devices are Available in 8-Pin
uSOP Packages and the DS1631 is Also

Available in a 150mil SO
Table 1 for Ordering Information

DS1631/DS1631A/DS1731

High-Precision Digital Thermometer and Thermostat

PIN CONFIGURATIONS

SDA 1

SCL 2

TOUT

GND 4
uSOP

DS1631U+, DS1631AU+,

DS1731U+

SDA 1
8 VDD

SCL 2

TOUT

GND 4
7 A0 6 A1 5 A2

SO 150mil and 208mil DS1631Z+, DS1631S+

See Table 2 for Pin Descriptions

Network Routers and Switches Cellular Base Stations Portable Products Any Space-Constrained Thermally Sensitive

Product

The DS1631, DS1631A, and DS1731 digital thermometers provide 9, 10, 11, or 12-bit temperature readings over a -55°C to +125°C range. The DS1631 and DS1631A thermometer accuracy is ±0.5°C from 0°C to +70°C with 3.0V VDD 5.5V, and the DS1731 accuracy is ±1°C from -10°C to +85°C with 3.0V VDD 5.5V. The thermostat on all three devices provides custom hysteresis with user-defined trip points TH and TL . The TH and TL registers and thermometer configuration settings are stored in NV EEPROM so they can be programmed prior to installation. In addition, the DS1631A automatically begins taking temperature measurements at power-up, which allows it to function as a stand-alone thermostat. Communication with the DS1631/DS1631A/DS1731 is achieved through a 2-wire serial interface, and three address pins allow up to eight devices to be multidropped on the same 2-wire bus.

Pin descriptions for the DS1631/DS1631A/DS1731 are provided in Table 2 and user-accessible registers are summarized in Table A functional diagram is shown in Figure
1 of 15
102307

DS1631/DS1631A/DS1731
Table ORDERING INFORMATION
ORDERING NUMBER

DS1631U+

DS1631U+T&R

DS1631Z+

DS1631Z+T&R

DS1631AU+

DS1631AU+T&R

DS1631S+

DS1631S+T&R

DS1631+ DS1731U+

DS1731U+T&R

DS1631U/T&R DS1631Z/T&R DS1631AU/T&R DS1631S

DS1631S/T&R

DS1631 DS1731U/T&R

PACKAGE MARKING D1631 See Note

D1631 See Note

DS1631Z See Note

DS1631Z See Note
1631A See Note
1631A See Note

DS1631S See Note

DS1631S See Note

DS1631 See Note D1731 See Note

D1731 See Note

D1631 DS1631Z 1631A DS1631S

DS1631S

DS1631 D1731

DS1631 in Lead-Free 8-Pin uSOP DS1631 in Lead-Free 8-Pin uSOP, 3000 Piece Tape-andReel DS1631 in Lead-Free 150 mil 8-Pin SO DS1631 in Lead-Free 150 mil 8-Pin SO, 2500 Piece Tapeand-Reel DS1631A in Lead-Free 8-Pin uSOP DS1631A in Lead-Free 8-Pin uSOP, 3000 Piece Tape-andReel DS1631 in Lead-Free 208 mil 8-Pin SO DS1631 in Lead-Free 208 mil 8-Pin SO, 2000 Piece Tapeand-Reel DS1631 in Lead-Free 300 mil 8-Pin DIP DS1731 in Lead-Free 8-Pin uSOP DS1731 in Lead-Free 8-Pin uSOP, 3000 Piece Tape-andReel DS1631 in 8-Pin uSOP DS1631 in 8-Pin uSOP, 3000-Piece Tape-and-Reel DS1631 in 150mil 8-Pin SO DS1631 in 150mil 8-Pin SO, 2500-Piece Tape-and-Reel DS1631A in 8-Pin uSOP DS1631A in 8-Pin uSOP, 3000-Piece Tape-and-Reel DS1631 in 208 mil 8-Pin SO DS1631 in Lead-Free 208 mil 8-Pin SO, 2000 Piece Tapeand-Reel DS1631 in 300 mil 8-Pin DIP DS1731 in 8-Pin uSOP DS1731 in 8-Pin uSOP, 3000-Piece Tape-and-Reel

Note A "+" symbol will also be marked on the package near the Pin 1 indicator

Table DETAILED PIN DESCRIPTION

PIN SYMBOL

SDA Data Input/Output Pin for 2-Wire Serial Communication Port. Open-Drain.

SCL Clock Input Pin for 2-Wire Serial Communication Port.

TOUT Thermostat Output Pin. Push-Pull.

GND Ground Pin

Address Input Pin

Address Input Pin

Address Input Pin

Supply Voltage Pin. +2.7V to +5.5V Power-Supply Pin.
2 of 15

Figure FUNCTIONAL DIAGRAM

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Datasheet ID: DS1631AU 647159