DS1621 Datasheet

  • DS1621

  • Digital Thermometer and Thermostat

  • 647.51KB

  • Dallas

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DS1621
Digital Thermometer and Thermostat
www.dalsemi.com
FEATURES
Temperature measurements require no
external components
Measures temperatures from 鈥?5掳C to
+125掳C in 0.5掳C increments. Fahrenheit
equivalent is 鈥?7掳F to 257掳F in 0.9掳F
increments
Temperature is read as a 9鈥揵it value (2-
byte transfer)
Wide power supply range (2.7V to 5.5V)
Converts temperature to digital word in 1
second
Thermostatic settings are user definable
and nonvolatile
Data is read from/written via a two鈥搘ire
serial interface (open drain I/O lines)
Applications include thermostatic
controls, industrial systems, consumer
products, thermometers, or any thermal
sensitive system
8鈥損in DIP or SOIC package (150-MIL and
208-MIL)
PIN ASSIGNMENT
SDA
SCL
T
OUT
GND
1
2
3
4
8
7
6
5
V
DD
A
0
A
1
A
2
DS1621S 8-PIN SOIC (150-MIL)
DS1621V 8-PIN SOIC (208-MIL)
See Mech Drawings Section
SDA
SCL
T
OUT
GND
1
2
3
4
8
7
6
5
V
DD
A
0
A
1
A
2
DS1621 8-PIN DIP (300-MIL)
See Mech Drawings Section
PIN DESCRIPTION
SDA
SCL
GND
T
OUT
A0
A1
A2
V
DD
- 2-Wire Serial Data Input/Output
- 2-Wire Serial Clock
- Ground
- Thermostat Output Signal
- Chip Address Input
- Chip Address Input
- Chip Address Input
- Power Supply Voltage
DESCRIPTION
The DS1621 Digital Thermometer and Thermostat provides 9鈥揵it 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鈥揹efined 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
DS1621 over a simple two鈥搘ire serial interface.
1 of 16
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DS1621 产品属性

  • Lead (SnPb) Finish for COTSObsolescence Mitigation Program

  • 50

  • 集成电路 (IC)

  • PMIC - 热管理

  • -

  • 温度计,恒温计

  • 内部

  • -55°C ~ 125°C

  • ±2°C(最小值)

  • ADC(三角积分型),比较器,寄存器库

  • I²C?/SMBus?

  • 2.7 V ~ 5.5 V

  • -55°C ~ 125°C

  • 通孔

  • 8-DIP(0.300",7.62mm)

  • 8-DIP

  • 管件

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