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DS3231时钟芯片 中文数据手册
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2012-02-23
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DS3231时钟芯片 中文数据手册,一个好用的时钟芯片,支持商业级和工业级,价格便宜
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____________________________________
概述
DS3231
กّ֑ӊĂݽڪ
I
2
C
෯෫෫ት
(RTC)
Ljᅘࣅ֑
وུԣስظಹ
(TCXO)
ࠧăݡಹҪࠆ٫֠พ൩
ڭLjڱኙ٫ᆚ෫৹ү֞വوࣜ෫ăࣅ֑ስظ
ಹ໗ݽષಹوլಜവڪLjԌඵષූդوᆐื
ફă
DS3231
໗ޥඨᅋ࣌ࠧޠჟུ࣌ڪ۶ཙLjԳᅋ
16
ᄧĂ
300mil
و
SO
ܢኰă
RTC
ү֞ஓĂܖĂ෫ĂဵಜĂಜĂᆨࠧ௰ဳྲăඵᅢ
31
وᆨܝLjዔڑٻሿᆨயಜLjҪ൰௰ԣխă෫
ትوޠዷޏ৹ჾก
24
ဏ෫ࢪ؞
AM /PM
ቚو
12
ဏ෫
ޏă໗ޥޔ৹Ӭ֔ઈትࠧქଁ৹Ӭ֔۽Ԓพ־ă
ٜᅳืয߹
I
2
C
ใဂዜהှבพă
وĂ߹ུڪԣխو٫ႅࢱኼࠧӔಹᅋࣶญ
V
CC
ኴຢLjჾՌ٫ᆚ߆ሓĂ໗ޥݒพ־LjԌᇀӤე෫ዔ
ڑࡳفӄᅋ٫ᆚă༶Lj
RST
ࣶญᄧ৹ჾዷཛྷฐڑѢ
ఉพ൩Ljჾդූ μ
P
ݒဳࠟă
_________________________________
应用
ܾྣಹ ٫ӹ
ᆜ֔ဳྲ࿅༇
GPS
____________________________________
特性
♦ 0°C
至
+40°C
范围内时钟精度为
±2ppm
♦ -40°C
至
+85°C
范围内时钟精度为
±3.5ppm
♦
为连续计时提供备用电池输入
♦
工作温度范围
商用级:
0°C
至
+70°C
工业级:
-40°C
至
+85°C
♦
低功耗
♦
实时时钟提供秒、分、时、星期、日期、月、
年信息,并提供有效期到
2100
年的闰年补偿
♦
两个日历闹钟
♦
可编程方波输出
♦
快速
(400kHz) I
2
C
接口
♦ 3.3V
工作电压
♦
数字温度传感器输出:精度为
±3°C
♦
老化修正寄存器
♦ RST
输出/手动复位去抖输入
♦
通过保险商试验机构
(UL)
认证
DS3231
高精度、
I
2
C
接口、集成
RTC/TCXO/
晶体
______________________________________________ Maxim Integrated Products 1
19-5170; Rev 8; 7/10
________________________________
定购信息
引脚配置在数据资料的最后给出。
________________________________________________________________________
典型工作电路
#
ӹܻࠩ
RoHS
ӶኼوಹLjدᅘ৹ࠆೆLjᄽᅘ
RoHS
ߢڊو
ࢥஊദăԳᅋ
JESD97 e3
ᄧߞ࣒ฯLjܻࠩࠆೆࠧྐೆࠒ
ૣ֔وეഓăڇӶණൌࠨብوĐ
#
đࠟোӹܻࠩ
RoHS
Ӷኼă
۾ᆪဵ፞ᆪၫᓾ೯ࡼፉᆪLjᆪᒦభถࡀᏴፉࡼݙᓰཀྵࡇᇙăྙኊጙݛཀྵཱྀLj༿Ᏼิࡼଐᒦݬఠ፞ᆪᓾ೯ă
ᎌଥৃĂૡૺࢿ৪ቧᇦLj༿ೊ Nbyjn ᒴሾ၉ᒦቦǖ21911!963!235:!)۱ᒦཌ*Lj21911!263!235:!)ฉᒦཌ*Lj
ᆰ Nbyjn ࡼᒦᆪᆀᐶǖdijob/nbyjn.jd/dpnă
PART TEMP RANGE PIN-PACKAGE
DS3231S# 0°C to +70°C 16 SO
DS3231SN# -40°C to +85°C 16 SO
DS3231
V
CC
SCL
R
PU
R
PU
= t
R
/C
B
R
PU
INT/SQW
32kHz
V
BAT
PUSHBUTTON
RESET
SDA
RST
N.C.
N.C.
N.C.
N.C.
V
CC
V
CC
GND
V
CC
μP
N.C.
N.C.
N.C.
N.C.
SCL
SDA
RST
DS3231
高精度、
I
2
C
接口、集成
RTC/TCXO/
晶体
2 _____________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
RECOMMENDED OPERATING CONDITIONS
(T
A
= T
MIN
to T
MAX
, unless otherwise noted.) (Notes 2, 3)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Voltage Range on V
CC
, V
BAT
, 32kHz, SCL, SDA, RST,
INT/SQW Relative to Ground.............................-0.3V to +6.0V
Junction-to-Ambient Thermal Resistance (θ
JA
) (Note 1)....73°C/W
Junction-to-Case Thermal Resistance (θ
JC
) (Note 1) ......23°C/W
Operating Temperature Range
(noncondensing) .............................................-40°C to +85°C
Junction Temperature......................................................+125°C
Storage Temperature Range ...............................-40°C to +85°C
Lead Temperature (soldering, 10s) .................................+260°C
Soldering Temperature (reflow, 2 times max)
Lead(Pb)-free...............................................................+260°C
Containing lead(Pb) .....................................................+240°C
(See the Handling, PC Board Layout, and Assembly section.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
V
CC
2.3 3.3 5.5 V
Supply Voltage
V
BAT
2.3 3.0 5.5 V
Logic 1 Input SDA, SCL V
IH
0.7 x
V
CC
V
CC
+
0.3
V
Logic 0 Input SDA, SCL V
IL
-0.3
0.3 x
V
CC
V
ELECTRICAL CHARACTERISTICS
(V
CC
= 2.3V to 5.5V, V
CC
= Active Supply (see Table 1), T
A
= T
MIN
to T
MAX
, unless otherwise noted.) (Typical values are at V
CC
=
3.3V, V
BAT
= 3.0V, and T
A
= +25°C, unless otherwise noted.) (Notes 2, 3)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
V
CC
= 3.63V 200
Active Supply Current I
CCA
(Notes 4, 5)
V
CC
= 5.5V 300
μA
V
CC
= 3.63V 110
Standby Supply Current I
CCS
I
2
C bus inactive, 32kHz
output on, SQW output off
(Note 5)
V
CC
= 5.5V 170
μA
V
CC
= 3.63V 575
Temperature Conversion Current I
CCSCONV
I
2
C bus inactive, 32kHz
output on, SQW output off
V
CC
= 5.5V 650
μA
Power-Fail Voltage V
PF
2.45 2.575 2.70 V
Logic 0 Output, 32kHz,
INT/SQW, SDA
V
OL
I
OL
= 3mA 0.4 V
Logic 0 Output, RST V
OL
I
OL
= 1mA 0.4 V
Output Leakage Current 32kHz,
INT/SQW, SDA
I
LO
Output high impedance -1 0 +1 μA
Input Leakage SCL I
LI
-1 +1 μA
RST Pin I/O Leakage I
OL
RST high impedance (Note 6) -200 +10 μA
V
BAT
Leakage Current
(V
CC
Active)
I
BATLKG
25 100 nA
Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-
layer board. For detailed information on package thermal considerations, refer to china.maxim-ic.com/thermal-tutorial
.
DS3231
高精度、
I
2
C
接口、集成
RTC/TCXO/
晶体
_____________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= 2.3V to 5.5V, V
CC
= Active Supply (see Table 1), T
A
= T
MIN
to T
MAX
, unless otherwise noted.) (Typical values are at V
CC
=
3.3V, V
BAT
= 3.0V, and T
A
= +25°C, unless otherwise noted.) (Notes 2, 3)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Output Frequency f
OUT
V
CC
= 3.3V or V
BAT
= 3.3V 32.768 kHz
0°C to +40°C ±2
Frequency Stability vs.
Temperature (Commercial)
f/f
OUT
V
CC
= 3.3V or
V
BAT
= 3.3V,
aging offset = 00h
>40°C to +70°C ±3.5
ppm
-40°C to <0°C ±3.5
0°C to +40°C ±2
Frequency Stability vs.
Temperature (Industrial)
f/f
OUT
V
CC
= 3.3V or
V
BAT
= 3.3V,
aging offset = 00h
>40°C to +85°C ±3.5
ppm
Frequency Stability vs. Voltage f/V 1 ppm/V
-40°C 0.7
+25°C 0.1
+70°C 0.4
Trim Register Frequency
Sensitivity per LSB
f/LSB Specified at:
+85°C 0.8
ppm
Temperature Accuracy Temp V
CC
= 3.3V or V
BAT
= 3.3V -3 +3 °C
First year ±1.0
Crystal Aging f/f
O
After reflow,
not production tested
0–10 years ±5.0
ppm
ELECTRICAL CHARACTERISTICS
(V
CC
= 0V, V
BAT
= 2.3V to 5.5V, T
A
= T
MIN
to T
MAX
, unless otherwise noted.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
V
BAT
= 3.63V 70
Active Battery Current I
BATA
EOSC = 0, BBSQW = 0,
SCL = 400kHz (Note 5)
V
BAT
= 5.5V 150
μA
V
BAT
= 3.63V 0.84 3.0
Timekeeping Battery Current I
BATT
EOSC = 0, BBSQW = 0,
EN32kHz = 1,
SCL = SDA = 0V or
SCL = SDA = V
BAT
(Note 5)
V
BAT
= 5.5V 1.0 3.5
μA
V
BAT
= 3.63V 575
Temperature Conversion Current I
BATTC
EOSC = 0, BBSQW = 0,
SCL = SDA = 0V or
SCL = SDA = V
BAT
V
BAT
= 5.5V 650
μA
Data-Retention Current I
BATTDR
EOSC = 1, SCL = SDA = 0V, +25°C 100 nA
DS3231
高精度、
I
2
C
接口、集成
RTC/TCXO/
晶体
4 _____________________________________________________________________
AC ELECTRICAL CHARACTERISTICS
(V
CC
= V
CC(MIN)
to V
CC(MAX)
or V
BAT
= V
BAT(MIN)
to V
BAT(MAX)
, V
BAT
> V
CC
, T
A
= T
MIN
to T
MAX
, unless otherwise noted.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Fast mode 100 400
SCL Clock Frequency f
SCL
Standard mode 0 100
kHz
Fast mode 1.3
Bus Free Time Between STOP
and START Conditions
t
BUF
Standard mode 4.7
μs
Fast mode 0.6
Hold Time (Repeated) START
Condition (Note 7)
t
HD:STA
Standard mode 4.0
μs
Fast mode 1.3
Low Period of SCL Clock t
LOW
Standard mode 4.7
μs
Fast mode 0.6
High Period of SCL Clock t
HIGH
Standard mode 4.0
μs
Fast mode 0 0.9
Data Hold Time (Notes 8, 9) t
HD:DAT
Standard mode 0 0.9
μs
Fast mode 100
Data Setup Time (Note 10) t
SU:DAT
Standard mode 250
ns
Fast mode 0.6
START Setup Time t
SU:STA
Standard mode 4.7
μs
Fast mode 300
Rise Time of Both SDA and SCL
Signals (Note 11)
t
R
Standard mode
20 +
0.1C
B
1000
ns
Fast mode 300
Fall Time of Both SDA and SCL
Signals (Note 11)
t
F
Standard mode
20 +
0.1C
B
300
ns
Fast mode 0.6
Setup Time for STOP Condition t
SU:STO
Standard mode 4.7
μs
Capacitive Load for Each Bus
Line
C
B
(Note 11) 400 pF
Capacitance for SDA, SCL C
I/O
10 pF
Pulse Width of Spikes That Must
Be Suppressed by the Input Filter
t
SP
30 ns
Pushbutton Debounce PB
DB
250 ms
Reset Active Time t
RST
250 ms
Oscillator Stop Flag (OSF) Delay t
OSF
(Note 12) 100 ms
Temperature Conversion Time t
CONV
125 200 ms
POWER-SWITCH CHARACTERISTICS
(T
A
= T
MIN
to T
MAX
)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
V
CC
Fall Time; V
PF(MAX)
to
V
PF(MIN)
t
VCCF
300 μs
V
CC
Rise Time; V
PF(MIN)
to
V
PF(MAX)
t
VCCR
0 μs
Recovery at Power-Up t
REC
(Note 13) 250 300 ms
剩余19页未读,继续阅读
资源评论
- yuanzhenxia722012-12-09很实用的数据手册。
- bessics2014-10-30不错,手册还可以
luoct1234
- 粉丝: 0
- 资源: 2
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