DS1621S/T&R datasheet, PDF - EEWORLD Datasheet

Datasheet> All Categories > The sensor> Sensor/transducer> DS1621S/T&R

DS1621S/T&R: DescriptionIC thermometer/stat dig 8-soic; CategoryThe sensor Sensor/transducer; File Size381KB，16 Pages; ManufacturerMaxim; Websitehttps://www.maximintegrated.com/en.html

Download Datasheet Parametric Compare View All

DS1621S/T&R Overview

IC thermometer/stat dig 8-soic

DS1621S/T&R Parametric

Parameter Name	Attribute value
Is it lead-free?	Contains lead
Is it Rohs certified?	incompatible
Maker	Maxim
package instruction	SOP8,.25
Reach Compliance Code	not_compliant
ECCN code	EAR99
Maximum accuracy (Celsius)	2 Cel
Other features	COMPLIANCE TO MIL-150
body width	3.91 mm
body height	1.395 mm
Body length or diameter	4.88 mm
shell	PLASTIC
JESD-609 code	e0
Installation features	SURFACE MOUNT
Number of digits	9
Number of terminals	8
Maximum working current	1.25 mA
Maximum operating temperature	125 °C
Minimum operating temperature	-55 °C
Output interface type	2-WIRE INTERFACE
Package body material	PLASTIC/EPOXY
Encapsulate equivalent code	SOP8,.25
Package Shape/Form	RECTANGULAR
power supply	3/5 V
Sensor/Transducer Type	TEMPERATURE SENSOR,SWITCH/DIGITAL OUTPUT,SERIAL
Maximum supply voltage	5.5 V
Minimum supply voltage	2.7 V
surface mount	YES
Terminal surface	Tin/Lead (Sn/Pb)
Termination type	SOLDER

Preview

Download Datasheet

View All

AVAILAB

DS1621

Digital Thermometer and Thermostat

FEATURES

Temperature measurements require no

external components

Measures temperatures from -55°C to +125°C

in 0.5°C increments. Fahrenheit equivalent is

-67°F to 257°F in 0.9°F increments

Temperature is read as a 9-bit value (2-byte

transfer)

Wide power supply range (2.7V to 5.5V)

Converts temperature to digital word in less

than 1 second

Thermostatic settings are user definable and

nonvolatile

Data is read from/written via a 2-wire serial

interface (open drain I/O lines)

Applications include thermostatic controls,

industrial systems, consumer products,

thermometers, or any thermal sensitive

system

8-pin DIP or SO package (150mil and

208mil)

PIN ASSIGNMENT

SDA

SCL

OUT

GND

DS1621S 8-PIN SO (150mil)

DS1621V 8-PIN SO (208mil)

SDA

SCL

OUT

GND

DS1621 8-PIN DIP (300mil)

PIN DESCRIPTION

SDA

SCL

GND

OUT

- 2-Wire Serial Data Input/Output

- 2-Wire Serial Clock

- Ground

- Thermostat Output Signal

- Chip Address Input

- Power Supply Voltage

Functional Diagrams

DESCRIPTION

The DS1621 Digital Thermometer and Thermostat provides 9-bit temperature readings, which indicate

the temperature of the device. The thermal alarm output, T

OUT

is active when the temperature of the

device exceeds a user-defined temperature TH. The output remains active until the temperature drops

below user defined temperature TL, allowing for any hysteresis necessary.

User-defined temperature settings are stored in nonvolatile memory so parts may be programmed prior to

insertion in a system. Temperature settings and temperature readings are all communicated to/from the

Pin Configurations appear at end of data sheet.

DS1621 over a simple 2-wire serial

data sheet.

Functional Diagrams continued at end of

interface.

UCSP is a trademark of Maxim Integrated Products, Inc.

For pricing, delivery, and ordering information, please contact Maxim Direct

at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.

090905

DS1621

In one-shot mode, the DS1621 performs a single temperature conversion when a Start Convert T

command is issued. When the conversion is complete, the device enters a low-power idle state and

remains in that state until a single temperature conversion is again initiated by a Start Convert T

command.

Thermostat Control

In its operating mode, the DS1621 functions as a thermostat with programmable hysteresis as shown in

Figure 3. The thermostat output updates as soon as a temperature conversion is complete.

When the DS1621’s temperature meets or exceeds the value stored in the high temperature trip register

(TH), the output becomes active and will stay active until the temperature falls below the temperature

stored in the low temperature trigger register (TL). In this way, any amount of hysteresis may be

obtained.

The active state for the output is programmable by the user so that an active state may either be a logic

"1" (V

) or a logic "0" (0V). This is done using the POL bit in the configuration reagister as explained

in the

Operation and Control

section of this datasheet.

Figure 3. THERMOSTAT OUTPUT OPERATION

DQ (Thermostat output, Active = High)

T (°C)

OPERATION AND CONTROL

The DS1621 must have temperature settings resident in the TH and TL registers for thermostatic

operation. A configuration/status register also determines the method of operation that the DS1621 will

use in a particular application, as well as indicating the status of the temperature conversion operation.

The configuration register is defined as follows:

MSb

DONE

where

DONE

= Conversion Done bit. “1” = Conversion complete, “0” = Conversion in progress.

THF

= Temperature High Flag. This bit will be set to “1” when the temperature is greater than or

equal to the value of TH. It will remain “1” until reset by writing “0” into this location or removing power

from the device. This feature provides a method of determining if the DS1621 has ever been subjected to

temperatures above TH while power has been applied.

5 of 16

Bit 6

THF

Bit5

TLF

Bit 4

NVB

Bit 3

Bit 2

Bit 1

POL

LSb

1SHOT

DS1621S/T&R Related Products

	DS1621S/T&R	DS1621V/T&R
Description	IC thermometer/stat dig 8-soic	IC thermometer/stat dig 8-soic
Is it lead-free?	Contains lead	Contains lead
Is it Rohs certified?	incompatible	incompatible
Maker	Maxim	Maxim
package instruction	SOP8,.25	0.208 INCH, SOIC-8
Reach Compliance Code	not_compliant	not_compliant
Other features	COMPLIANCE TO MIL-150	COMPLIANCE TO MIL-208
body width	3.91 mm	3.91 mm
body height	1.395 mm	1.395 mm
Body length or diameter	4.88 mm	4.88 mm
shell	PLASTIC	PLASTIC
JESD-609 code	e0	e0
Installation features	SURFACE MOUNT	SURFACE MOUNT
Number of digits	9	9
Number of terminals	8	8
Maximum working current	1.25 mA	1.25 mA
Maximum operating temperature	125 °C	125 °C
Minimum operating temperature	-55 °C	-55 °C
Output interface type	2-WIRE INTERFACE	2-WIRE INTERFACE
Package body material	PLASTIC/EPOXY	PLASTIC/EPOXY
Encapsulate equivalent code	SOP8,.25	SOP8,.3
Package Shape/Form	RECTANGULAR	RECTANGULAR
power supply	3/5 V	3/5 V
Sensor/Transducer Type	TEMPERATURE SENSOR,SWITCH/DIGITAL OUTPUT,SERIAL	TEMPERATURE SENSOR,SWITCH/DIGITAL OUTPUT,SERIAL
Maximum supply voltage	5.5 V	5.5 V
Minimum supply voltage	2.7 V	2.7 V
surface mount	YES	YES
Terminal surface	Tin/Lead (Sn/Pb)	Tin/Lead (Sn/Pb)
Termination type	SOLDER	SOLDER

Recommended Resources

High-power DC regulated power supply-main loop circuit

Reed switch liquid level automatic control circuit 4 (thyristor part) (fill-in type)

30W audio power amplifier LM4700-01

Simple electronic doorbell circuit 2

Diode-free high-speed rectifier circuit

Button type electronic code lock circuit

mini2440 + 3.5"LCD package + h3c s2108: mini2440 + 3.5"LCD package: Brand new, see the Friendly Arm official website for details, price 400 yuan. h3c s2108 90% new, price 400 yuan. Not including postage (in Beijing, face-to-face transaction...; 0957 Buy&Sell

Land and air vehicles: This unique American-made car can be driven on land or fly in the air, which is very cool. When it flies in the air, it can unfold a wide and strong paraglider-like wing, and the propeller at the tail...; xyh_521 Creative Market

Has anyone done RIL development in Qtopia?: I am now going to add a RIL layer to Qtopia to implement RIL functions similar to those in WM. Qatchat in Qtopia is similar to RIL Driver, which converts some request codes of related modules into AT ...; nwuwmz Embedded System

Four-frame comic "About going to work": ...; maker Talking

Record the New Year atmosphere in my hometown and share my New Year: 2015 is here. I returned to my hometown to visit my relatives. I tasted the taste of home again. It's an ordinary countryside. There's nothing special about it. I still made some records. They are qui...; ienglgge Talking

A PC and a device with WinCE system are connected by a network cable to transfer files?: The questions are as follows: 1. Can the PC and the device be directly connected point-to-point with a network cable? How to set the IP addresses of both? 2. I developed a WinCE program under VS2008 a...; 无域思维 Embedded System

Shortcut: A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 AA AB AC AD AE AF AG AH AI AJ AK AL AM AN AO AP AQ AR AS AT AU AV AW AX AY AZ B0 B1 B2 B3 B4 B5 B6 B7 B8 B9 BA BB BC BD BE BF BG BH BI BJ BK BL BM BN BO BP BQ BR BS BT BU BV BW BX BY BZ C0 C1 C2 C3 C4 C5 C6 C7 C8 C9 CA CB CC CD CE CF CG CH CI CJ CK CL CM CN CO CP CQ CR CS CT CU CV CW CX CY CZ D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 DA DB DC DD DE DF DG DH DI DJ DK DL DM DN DO DP DQ DR DS DT DU DV DW DX DZ

Popular Components