DS1621S/T&R Maxim Integrated Products, DS1621S/T&R Datasheet - Page 2
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DS1621S/T&R
Manufacturer Part Number
DS1621S/T&R
Description
IC THERMOMETER/STAT DIG 8-SOIC
Manufacturer
Maxim Integrated Products
Datasheet
1.DS1621S.pdf
(16 pages)
Specifications of DS1621S/T&R
Function
Thermometer, Thermostat
Topology
ADC (Sigma Delta), Comparator, Register Bank
Sensor Type
Internal
Sensing Temperature
-55°C ~ 125°C
Output Type
I²C™/SMBus™
Output Alarm
Yes
Output Fan
No
Voltage - Supply
2.7 V ~ 5.5 V
Operating Temperature
-55°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Full Temp Accuracy
+/- 2 C
Digital Output - Bus Interface
Serial (2-Wire)
Digital Output - Number Of Bits
12 bit
Maximum Operating Temperature
+ 125 C
Minimum Operating Temperature
- 55 C
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
ORDERING INFORMATION
DS1621
DS1621+
DS1621S
DS1621S+
DS1621S/T&R
DS1621S+T&R
DS1621V
DS1621V+
DS1621V/T&R
DS1621V+T&R DS1621V (See Note)
Note: A “+” symbol will also be marked on the package near the Pin 1 indicator.
Table 1. DETAILED PIN DESCRIPTION
OPERATION
Measuring Temperature
A block diagram of the DS1621 is shown in Figure 1.
The DS1621 measures temperature using a bandgap-based temperature sensor. A delta-sigma analog-to-
digital converter (ADC) converts the measured temperature to a digital value that is calibrated in °C; for
°F applications, a lookup table or conversion routine must be used.
The temperature reading is provided in a 9-bit, two’s complement reading by issuing the READ
TEMPERATURE command. Table 2 describes the exact relationship of output data to measured
temperature. The data is transmitted through the 2-wire serial interface, MSB first. The DS1621 can
measure temperature over the range of -55°C to +125°C in 0.5°C increments.
ORDERING
NUMBER
PIN
1
2
3
4
5
6
7
8
SYMBOL
GND
SDA
T
SCL
V
A2
A1
A0
OUT
DD
DS1621
DS1621 (See Note)
DS1621
DS1621 (See Note)
DS1621
DS1621 (See Note)
DS1621V
DS1621V (See Note)
DS1621V
MARKING
PACKAGE
DESCRIPTION
Data input/output pin for 2-wire serial communication port.
Clock input/output pin for 2-wire serial communication port.
Thermostat output. Active when temperature exceeds TH; will reset when
temperature falls below TL.
Ground pin.
Address input pin.
Address input pin.
Address input pin.
Supply voltage input power pin. (2.7V to 5.5V)
DS1621 in Lead-Free 300 mil DIP
DS1621 in 150 mil SOIC
DS1621 in 150 mil SO, 2500 Piece Tape-and-Reel
DS1621 in Lead-Free 150 mil SO, 2500 Piece Tape-and-Reel
DS1621 in Lead-Free 208 mil SOIC
DS1621 in 208 mil SO, 2500 Piece Tape-and-Reel
DS1621 in Lead-Free 208 mil SO, 2500 Piece Tape-and-Reel
DS1621 in 300 mil DIP
DS1621 in Lead-Free 150 mil SOIC
DS1621 in 208 mil SOIC
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DESCRIPTION