Specification	DS1721S+T&R

Accuracy - Highest (Lowest) [custom]	2 °C
Accuracy - Highest (Lowest) [custom]	1 °C
Features	Standby Mode, Programmable Resolution, Programmable Limit, Output Switch, One-Shot
Mounting Type	Surface Mount
Operating Temperature [Max]	125 °C
Operating Temperature [Min]	-55 C
Output Type	I2C
Package / Case	0.154 in
Package / Case	8-SOIC
Package / Case	3.9 mm
Resolution	11 b
Sensing Temperature - Local [Max]	125 °C
Sensing Temperature - Local [Min]	-55 ¯C
Sensor Type	Digital, Local
Supplier Device Package	8-SOIC
Test Condition [Max]	85 °C
Test Condition [Max]	125 °C
Test Condition [Min]	-10 °C
Test Condition [Min]	-55 ¯C
Voltage - Supply [Max]	5.5 V
Voltage - Supply [Min]	2.7 V

DS1721 Series

Digital Thermometer and Thermostat

Part	Operating Temperature [Min]	Operating Temperature [Max]	Sensor Type	Features	Accuracy - Highest (Lowest) [custom]	Accuracy - Highest (Lowest) [custom]	Mounting Type	Resolution	Test Condition [Max]	Test Condition [Min]	Test Condition [Min]	Test Condition [Max]	Supplier Device Package	Voltage - Supply [Max]	Voltage - Supply [Min]	Output Type	Package / Case	Package / Case	Sensing Temperature - Local [Max]	Sensing Temperature - Local [Min]	Package / Case	Package / Case
Analog Devices Inc./Maxim Integrated DS1721U+T&R	-55 C	125 °C	Digital Local	One-Shot Output Switch Programmable Limit Programmable Resolution Standby Mode	2 °C	1 °C	Surface Mount	11 b	85 °C	-10 °C	-55 ¯C	125 °C	8-uMAX/uSOP	5.5 V	2.7 V	I2C	8-MSOP 8-TSSOP	0.118 in 3 mm Width	125 °C	-55 ¯C
Analog Devices Inc./Maxim Integrated DS1721U	-55 C	125 °C	Digital Local	One-Shot Output Switch Programmable Limit Programmable Resolution Standby Mode	2 °C	1 °C	Surface Mount	11 b	85 °C	-10 °C	-55 ¯C	125 °C	8-uMAX/uSOP	5.5 V	2.7 V	I2C	8-MSOP 8-TSSOP	0.118 in 3 mm Width	125 °C	-55 ¯C
Analog Devices Inc./Maxim Integrated DS1721U+	-55 C	125 °C	Digital Local	One-Shot Output Switch Programmable Limit Programmable Resolution Standby Mode	2 °C	1 °C	Surface Mount	11 b	85 °C	-10 °C	-55 ¯C	125 °C	8-uMAX/uSOP	5.5 V	2.7 V	I2C	8-MSOP 8-TSSOP	0.118 in 3 mm Width	125 °C	-55 ¯C
Analog Devices Inc./Maxim Integrated DS1721S+	-55 C	125 °C	Digital Local	One-Shot Output Switch Programmable Limit Programmable Resolution Standby Mode	2 °C	1 °C	Surface Mount	11 b	85 °C	-10 °C	-55 ¯C	125 °C	8-SOIC	5.5 V	2.7 V	I2C	8-SOIC		125 °C	-55 ¯C	0.154 in	3.9 mm
Analog Devices Inc./Maxim Integrated DS1721S	-55 C	125 °C	Digital Local	One-Shot Output Switch Programmable Limit Programmable Resolution Standby Mode	2 °C	1 °C	Surface Mount	11 b	85 °C	-10 °C	-55 ¯C	125 °C	8-SOIC	5.5 V	2.7 V	I2C	8-SOIC		125 °C	-55 ¯C	0.154 in	3.9 mm
Analog Devices Inc./Maxim Integrated DS1721S+T&R	-55 C	125 °C	Digital Local	One-Shot Output Switch Programmable Limit Programmable Resolution Standby Mode	2 °C	1 °C	Surface Mount	11 b	85 °C	-10 °C	-55 ¯C	125 °C	8-SOIC	5.5 V	2.7 V	I2C	8-SOIC		125 °C	-55 ¯C	0.154 in	3.9 mm
Analog Devices Inc./Maxim Integrated DS1721S/T&R	-55 C	125 °C	Digital Local	One-Shot Output Switch Programmable Limit Programmable Resolution Standby Mode	2 °C	1 °C	Surface Mount	11 b	85 °C	-10 °C	-55 ¯C	125 °C	8-SOIC	5.5 V	2.7 V	I2C	8-SOIC		125 °C	-55 ¯C	0.154 in	3.9 mm

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$	Updated

Digikey	Cut Tape (CT)	1	$ 5.77	<4d
		5	$ 5.18
		10	$ 4.97
		25	$ 4.71
		50	$ 4.54
		100	$ 4.37
		500	$ 4.13
	Tape & Reel (TR)	2500	$ 3.78	<4d
Newark	Each (Supplied on Cut Tape)	1	$ 4.46	1m+
		10	$ 3.97
		25	$ 3.74
		50	$ 3.55
		100	$ 3.49
		250	$ 3.48
		500	$ 3.27
		1000	$ 3.20

Description

General part information

DS1721 Series

The DS1721 digital thermometer and thermostat features ±1°C accuracy over a -10°C to +85°C range. Thermometer data is read out over a 2-wire serial bus in 2's complement format with 9 to 12 bits of resolution (user-programmable). The DS1721 features three address inputs, allowing users to multidrop up to eight DS1721 devices on one bus.The DS1721 offers thermostatic functionality with over-temperature (TH) and under-temperature (TL) user-programmable trip-points stored in on-chip SRAM. The two trip-points provide programmable thermostat hysteresis: the thermostat output is asserted when the measured temperature exceeds THand it remains active until the temperature falls below TL.The DS1721 is available in 150mil 8-pin SO (DS1721S) and 8-pin µMAX/µSOP (DS1721U) packages. For applications requiring higher precision, theDS1631provides ±0.5°C accuracy and is functionally compatible with the DS1721.ApplicationsAlarm SystemsFibre ChannelInstrumentationNetworking

Documents

Technical documentation and resources

DS1721S+T&R

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DS1721S+T&R

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Technical Specifications

DS1721 Series

Pricing

Description

DS1721 Series

Documents

Technical Data Sheet EN

Product Change Notice EN

DS1721 Reliability Data

Package Drawing - Small-Outline IC, Narrow (0.15in)

DS1721 Series