are stress ratings only and functional operation of the device at these or any other conditions above those indicated in the operation sections of this specification is not implied. Exposure
to absolute maximum rating conditions for extended periods of time may affect reliability.
DC Electrical Characteristics
(V
DD
= 2.7V to 5.5V; T
A
= -55°C to +125°C.)
PARAMETER
Supply Voltage
SYMBOL
V
DD
(Note 1)
0°C to +70°C,
3.0V ≤ V
DD
≤ 5.5V
T
ERR
0°C to +70°C,
2.7V ≤ V
DD
< 3.0V
-55°C to +125°C
-10°C to +85°C,
3.0V ≤ V
DD
≤ 5.5V
T
ERR
-10°C to +85°C,
2.7V ≤ V
DD
< 3.0V
-55°C to +125°C
Low-Level Input Voltage
High-Level Input Voltage
SDA Low-Level Output
Voltage
Input Current Each I/O Pin
V
IL
V
IH
V
OL1
V
OL2
3mA sink current
6mA sink current
0.4 < V
I/O
< 0.9V
DD
Temperature conversion
-55°C to +85°C
Active Supply Current (Note 3)
I
DD
Temperature conversion
+85°C to +125°C
E
2
write
Communication only
Standby Supply Current
T
OUT
Output Logic Voltage
I
STBY
V
OH
V
OL
0°C to +70°C (Note 4)
1mA source current (Note 1)
4mA sink current (Note 1)
2.4
0.4
-0.5
0.7 x V
DD
0
0
-10
CONDITION
MIN
2.7
MAX
5.5
±0.5
±1
±2
±1
±1.5
±2
0.3 x V
DD
V
DD
+ 0.3
0.4
0.6
+10
1
mA
1.25
400
110
800
µA
nA
V
V
V
V
V
µA
°C
°C
UNITS
V
DS1631, DS1631A
Thermometer Error (Note 2)
DS1731 Thermometer Error
(Note 2)
www.maximintegrated.com
Maxim Integrated
│
2
DS1631/DS1631A/
DS1731
AC Electrical Characteristics
(V
DD
= 2.7V to 5.5V; T
A
= -55°C to +125°C.)
PARAMETER
SYMBOL
9-bit resolution
Temperature Conversion Time
t
TC
10-bit resolution
11-bit resolution
12-bit resolution
SCL Frequency
Bus Free Time Between a STOP
and START Condition
START and Repeated START
Hold Time from Falling SCL
Low Period of SCL
High Period of SCL
Repeated START Condition
Setup Time to Rising SCL
Data-Out Hold Time from
Falling SCL
Data-In Setup Time to
Rising SCL
Rise Time of SDA and SCL
Fall Time of SDA and SCL
STOP Setup Time to Rising
SCL
Capacitive Load for Each
Bus Line
I/O Capacitance
Input Capacitance
Spike Pulse Width that can be
Suppressed by Input Filter
Note
Note
Note
Note
Note
Note
Note
1:
2:
3:
4:
5:
6:
7:
f
SCL
t
BUF
t
HD:STA
t
LOW
t
HIGH
t
SU:STA
t
HD:DAT
t
SU:DAT
t
R
t
F
t
SU:STO
C
B
C
I/O
C
I
t
SP
(Note 5)
(Note 5, 6)
(Note 5)
(Note 5)
(Note 5)
(Note 5)
(Note 5)
(Note 5, 7)
(Note 5, 7)
(Note 5)
CONDITION
High-Precision Digital
Thermometer and Thermostat
MIN
TYP
MAX
93.75
187.5
375
750
UNITS
ms
0
1.3
0.6
1.3
0.6
0.6
0
100
20 + 0.1C
B
20 + 0.1C
B
0.6
400
kHz
µs
µs
µs
µs
µs
0.9
µs
ns
1000
300
ns
ns
µs
400
10
5
0
50
pF
pF
pF
ns
All voltages are referenced to GND.
See
Figure 2
for Typical Operating Curves.
Specified with T
OUT
pin open; A
0
, A
1
, A
2
= 0V or V
DD
; and f
SCL
≥ 2Hz.
Specified with temperature conversions stopped; T
OUT
pin open; SDA = V
DD
; SCL = V
DD
; and A
0
, A
1
, A
2
= 0V or V
DD
.
See Timing Diagram in
Figure 3.
All timing is referenced to 0.9 x V
DD
and 0.1 x V
DD
.
After this period the first clock pulse is generated.
For example, if C
B
= 300pF, then t
R
[min] = t
F
[min] = 50ns.
EEPROM AC Electrical Characteristics
(V
DD
= 2.7V to 5.5V; T
A
= -55°C to +125°C.)
PARAMETER
EEPROM Write Cycle Time
EEPROM Writes
EEPROM Data Retention
SYMBOL
t
wr
N
EEWR
t
EEDR
-55°C to +55°C
-55°C to +55°C
50k
10
CONDITION
MIN
TYP
4
MAX
10
UNITS
ms
Writes
Years
www.maximintegrated.com
Maxim Integrated
│
3
DS1631/DS1631A/
DS1731
Table 2. Detailed Pin Description
PIN
1
2
3
4
5
6
7
8
SYMBOL
SDA
SCL
T
OUT
GND
A
2
A
1
A
0
V
DD
High-Precision Digital
Thermometer and Thermostat
DESCRIPTION
Data Input/Output Pin for 2-Wire Serial Communication Port. Open-Drain.
Clock Input Pin for 2-Wire Serial Communication Port.
Thermostat Output Pin. Push-Pull.
Ground Pin
Address Input Pin
Address Input Pin
Address Input Pin
Supply Voltage Pin. +2.7V to +5.5V Power-Supply Pin.
V
DD
SCL
SDA
A
0
A
1
A
2
GND
ADDRESS
AND
I/O CONTROL
CONFIGURATION REGISTER
AND CONTROL LOGIC
TEMPERATURE SENSOR
AND ∆Σ ADC
DS1631
TEMPERATURE REGISTER
T
H
REGISTER
T
L
REGISTER
DIGITAL
COMPARATOR/LOGIC
T
OUT
Figure 1. Functional Diagram
0.8
0.6
0.4
DS1631/DS1631A
0.8
0.6
0.4
DS1731
ERROR (°C)
0
-0.2
-0.4
-0.6
-0.8
0
10
-3σ
+3σ
MEAN
ERROR (°C)
0.2
+3σ
0.2
0
-0.2
-0.4
-0.6
-3σ
MEAN
20
30
40
50
60
70
-0.8
-10
0
10
20
30
40
50
60
70
80
REFERENCE TEMPERATURE (°C)
REFERENCE TEMPERATURE (°C)
Figure 2. Typical Operating Curves
www.maximintegrated.com
Maxim Integrated
│
4
DS1631/DS1631A/
DS1731
High-Precision Digital
Thermometer and Thermostat
ALL TIMING IS REFERENCED TO 0.9 X V
DD
AND 0.1 x V
DD
.
SDA
t
BUF
t
SP
t
R
t
F
t
HD:STA
t
LOW
SCL
t
HD:STA
t
HD:DAT
STOP
START
t
HIGH
t
SU:DAT
t
SU:STO
t
SU:STA
REPEATED
START
Figure 3. Timing Diagram
Table 3. Register Summary
REGISTER NAME
(USER ACCESS)
Temperature (Read Only)
T
H
(Read/Write)
T
L
(Read/Write)
SIZE
(BYTES)
2
2
2
MEMORY
TYPE
SRAM
EEPROM
EEPROM
REGISTER CONTENTS
AND POWER-UP STATE
Measured temperature in two’s complement format.
Power-up state: -60ºC (1100 0100 0000 0000)
Upper alarm trip point in two’s complement format.
Factory state: 15ºC (0000 1111 0000 0000)
Lower alarm trip point in two’s complement format.
Factory state: 10ºC (0000 1010 0000 0000)
Configuration and status information. Unsigned data.
[size=5]1. I decided on a direction: software direction[/size] [size=4] I graduated more than two years ago, and I have been working on MCU software, hardware, PCB, testing, etc. It is too complicated...
Have you ever encountered this situation? The program compiles fine and passes the simulation, but if you add one or two lines of code that have no effect, the program compiles and passes, but the sim...
[i=s]This post was last edited by ylyfxzsx on 2016-8-21 16:04[/i] [font=Tahoma, Helvetica, SimSun, sans-serif]Now according to the analysis of netizens, it is very likely to be a smart bracelet produc...
[i=s]This post was last edited by qwqwqw2088 on 2020-1-17 08:34[/i]By: Hayden Hast – Systems EngineerWhen I first visited a Texas barbecue restaurant, I was so surprised by the variety of meats on the...
This is the interrupt function that enters the early wake-up (in the program's development board routine)void WWDG_IRQHandler(void) { u8 wr,tr; wr=WWDG-CFR0X7F; tr=WWDG-CR0X7F; if(trwr) WWDG_Set_Count...
Have you ever encountered data frame loss when doing SPI communication? Among multiple frames of data, one or more frames of data are always not received....
The intelligent driving community has its own rhythm. Some are busy pushing new versions and focusing on R&D, others are busy with publicity and promotion, and still others are immersed in mass pro...[Details]
New energy vehicles are increasingly popular with consumers due to policies and energy conservation. Once you've purchased your vehicle, maintenance is essential. However, due to the different powe...[Details]
Long ago, the lifespan of cars in my country was 15 years. Once a car reached 15 years old, it was forced to be scrapped. However, the policy was later changed. As long as the car does not exceed 6...[Details]
In recent years, the government has increasingly supported electric vehicles, and the number of electric vehicles has increased. Observant drivers will notice that there are many more green license...[Details]
Common Mode Semiconductor has officially released its latest generation of power management ICs—the GM6506 series. This fully integrated high-frequency synchronous rectification step-down p...[Details]
The digital TV set-top box consists of a tuner, QAM demodulator, TS demultiplexer, MPEG-2 decoder, PAUNTSC video encoder, embedded CPU system and peripheral interfaces, CA module, and uplink data m...[Details]
With the rapid development of electric vehicles in my country, people are beginning to pay attention to the issue of radiation from electric vehicles. We all know that mobile phones emit radiation,...[Details]
Electric vehicles are now widespread, but they've brought with them a host of problems, the most prominent of which is charging. Small electric vehicles (EVs) are a new form of transportation in a ...[Details]
One of the most core components of electric vehicles is the motor. The power supply provides electrical energy to the motor, which converts this electrical energy into mechanical energy, which in t...[Details]
In the field of intelligent driving, regulations are becoming increasingly stringent, and the technical threshold continues to rise. Especially after the traffic accident in March 2025, the Ministr...[Details]
China, August 21, 2025 – STMicroelectronics (NYSE: STM), a world-leading semiconductor company serving a wide range of electronics applications, has published its IFRS 2025 semi-annual financial re...[Details]
With the increasing popularity of automated equipment, linear modules, a common auxiliary device for automated equipment, have also seen a bright future. In particular, in recent years, many small ...[Details]
In daily life, when we purchase a transformer, we are faced with the installation and wiring procedures. Generally speaking, large transformers such as power transformers are equipped with speciali...[Details]
There are more and more electric vehicles. Recently, I have heard some news about electric vehicles performing poorly in winter. I would like to briefly introduce whether heat pump technology is mo...[Details]
introduction
The rapid adoption of computers has led to a growing number of tasks being performed on them. People from all walks of life, especially programmers and writers, are spending incre...[Details]
Talking
京公网安备 11010802033920号
EEWORLD
