Real Time Clocks:

244 Products Found
Real-Time Clock products offer a diverse range of real-time clock (RTC) solutions for networking and embedded applications. The primary function of RTC is to keep time and calendar data.We offer Real Time Clock (RTC) functions including Alarm RTC, Binary Counter, Real Time Calendar Clock (RTCC), Elapsed Time Recorder and Real Time Event Recorder. Use of a hardware RTC allows microcontrollers like the Raspberry Pi to be used without internet access and still provide services that use time stamps. For example, the DS1307 is a commonly available I2C based RTC module – so using the DS1307’s I2C protocol, which is supported by the Raspberry Pi, real time clock support can easily and cost-effectively be added.Another popular RTC module, also with I2C support, is the DS3231. The DS3231 is a low-cost, extremely accurate I²C real-time clock (RTC) with an integrated temperature-compensated crystal oscillator (TCXO) and crystal. The device incorporates a battery input, and maintains accurate timekeeping when mains power to the device is interrupted. Accuracy is ±2ppm from 0°C to +40°C, and ±3.5ppm from -40°C to +85°C.Apart from I2C, other interface types include 2 wire, 3 wire, 4 wire, Motorola Serial Peripheral Interface (SPI), Bytewide, Parallel, Multiplexed, and Phantom Clock.Operating temperatures range from -40°C minimum to +125°C maximum. Products are available to the AEC-Q100 Automotive Qualification Standard.
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Operating Temperature Max
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ComparePrice ForQuantity
2983745

RoHS

Each (Supplied on Cut Tape)
Cut Tape
1+
CNY21.480
(CNY24.2724)
10+
CNY16.080
(CNY18.1704)
25+
CNY14.710
(CNY16.6223)
50+
CNY13.950
(CNY15.7635)
100+
CNY13.180
(CNY14.8934)
More Pricing...
Total:CNY21.48
Min: 1 / Mult: 1
I2C
HH:MM:SS
Day; Date; Month; Year
Alarm RTC
HH:MM:SS
2.7V
5.5V
SOIC
SOIC
I2C
8Pins
-
-
-40°C
85°C
-
2775937RL

RoHS

Each (Supplied on Cut Tape)
Re-Reel
Packaging Options
100+
CNY3.930
(CNY4.4409)
500+
CNY3.260
(CNY3.6838)
1000+
CNY3.080
(CNY3.4804)
Total:CNY393.00
Min: 100 / Mult: 5
I2C
Binary
YYYY:MM:WK:DD:Hr:Min:Secs
Calendar, Clock
Binary
900mV
5.5V
TSSOP
TSSOP
I2C
8Pins
-
-
-40°C
85°C
-
2806838

RoHS

Each
1+
CNY50.490
(CNY57.0537)
10+
CNY38.840
(CNY43.8892)
25+
CNY35.950
(CNY40.6235)
50+
CNY35.200
(CNY39.776)
100+
CNY34.450
(CNY38.9285)
More Pricing...
Total:CNY50.49
Min: 1 / Mult: 1
I2C
HH:MM:SS:hh
Day; Date; Month; Year; Century
Alarm RTC
HH:MM:SS:hh
2.38V
5.5V
SOIC
SOIC
I2C
18Pins
-
-
-40°C
85°C
-
2806826RL

RoHS

Each (Supplied on Cut Tape)
Re-Reel
Packaging Options
10+
CNY56.270
(CNY63.5851)
25+
CNY52.320
(CNY59.1216)
50+
CNY51.240
(CNY57.9012)
100+
CNY50.150
(CNY56.6695)
250+
CNY49.060
(CNY55.4378)
Total:CNY562.70
Min: 10 / Mult: 1
I2C
HH:MM:SS:hh
Day; Date; Month; Year; Century
Alarm RTC
HH:MM:SS:hh
3V
3.6V
SOIC
SOIC
I2C
28Pins
-
-
-40°C
85°C
-
2890044RL

RoHS

Each (Supplied on Cut Tape)
Re-Reel
Packaging Options
100+
CNY6.060
(CNY6.8478)
250+
CNY5.700
(CNY6.441)
500+
CNY5.470
(CNY6.1811)
1000+
CNY5.290
(CNY5.9777)
2500+
CNY5.190
(CNY5.8647)
Total:CNY606.00
Min: 100 / Mult: 1
I2C
HH:MM:SS: 12Hr / 24Hr
YY-MM-DD-DW
Calendar, Clock
HH:MM:SS: 12Hr / 24Hr
900mV
5.5V
DFN2626
DFN2626
I2C
10Pins
-
-
-40°C
85°C
-
2775940RL

RoHS

Each (Supplied on Cut Tape)
Re-Reel
Packaging Options
100+
CNY6.000
(CNY6.780)
250+
CNY5.620
(CNY6.3506)
500+
CNY5.400
(CNY6.102)
1000+
CNY5.030
(CNY5.6839)
2500+
CNY4.930
(CNY5.5709)
Total:CNY600.00
Min: 100 / Mult: 1
I2C
Binary
YYYY:MM:WK:DD:Hr:Min:Secs
Calendar, Clock
Binary
1.1V
5.5V
HVQFN
HVQFN
I2C
16Pins
-
-
-40°C
85°C
-
2849896RL

RoHS

Each (Supplied on Cut Tape)
Re-Reel
Packaging Options
10+
CNY124.710
(CNY140.9223)
25+
CNY116.870
(CNY132.0631)
50+
CNY115.550
(CNY130.5715)
100+
CNY114.230
(CNY129.0799)
Total:CNY1,247.10
Min: 10 / Mult: 1
Parallel
HH:MM:SS
YY-MM-DD-dd
Calendar, Clock
HH:MM:SS
4.5V
5.5V
SOIC
SOIC
Parallel
28Pins
-
-
0°C
70°C
-
2775930RL

RoHS

Each (Supplied on Cut Tape)
Re-Reel
Packaging Options
100+
CNY6.440
(CNY7.2772)
250+
CNY6.050
(CNY6.8365)
500+
CNY5.820
(CNY6.5766)
1000+
CNY5.630
(CNY6.3619)
2500+
CNY5.520
(CNY6.2376)
Total:CNY644.00
Min: 100 / Mult: 1
SPI
Binary
YYYY:MM:WK:DD:Hr:Min:Secs
Calendar, Clock
Binary
1.1V
5.5V
TSSOP
TSSOP
SPI
14Pins
-
-
-40°C
85°C
-
2983743RL

RoHS

Each (Supplied on Cut Tape)
Re-Reel
Packaging Options
100+
CNY18.940
(CNY21.4022)
250+
CNY18.470
(CNY20.8711)
500+
CNY18.010
(CNY20.3513)
1000+
CNY17.540
(CNY19.8202)
Total:CNY1,894.00
Min: 100 / Mult: 1
I2C
HH:MM:SS
Day; Date; Month; Year
Alarm RTC
HH:MM:SS
1.4V
3.6V
NSOIC
NSOIC
I2C
8Pins
-
-
-40°C
85°C
-
2983744RL

RoHS

Each (Supplied on Cut Tape)
Re-Reel
Packaging Options
100+
CNY12.480
(CNY14.1024)
250+
CNY12.100
(CNY13.673)
500+
CNY11.860
(CNY13.4018)
1000+
CNY11.620
(CNY13.1306)
Total:CNY1,248.00
Min: 100 / Mult: 1
I2C
HH:MM:SS
Day; Date; Month; Year
Alarm RTC
HH:MM:SS
1.4V
3.6V
MSOP
MSOP
I2C
8Pins
-
-
-40°C
85°C
-
2983742

RoHS

Each (Supplied on Cut Tape)
Cut Tape
1+
CNY30.150
(CNY34.0695)
10+
CNY22.840
(CNY25.8092)
25+
CNY21.020
(CNY23.7526)
50+
CNY19.990
(CNY22.5887)
100+
CNY18.960
(CNY21.4248)
More Pricing...
Total:CNY30.15
Min: 1 / Mult: 1
I2C
HH:MM:SS
Day; Date; Month; Year
Alarm RTC
HH:MM:SS
2.7V
5.5V
NSOIC
NSOIC
I2C
8Pins
-
-
-40°C
85°C
-
2775936RL

RoHS

Each (Supplied on Cut Tape)
Re-Reel
Packaging Options
100+
CNY4.970
(CNY5.6161)
250+
CNY4.670
(CNY5.2771)
500+
CNY4.570
(CNY5.1641)
1000+
CNY4.330
(CNY4.8929)
2500+
CNY4.140
(CNY4.6782)
Total:CNY497.00
Min: 100 / Mult: 1
I2C
Binary
YYYY:MM:WK:DD:Hr:Min:Secs
Calendar, Clock
Binary
900mV
5.5V
TSSOP
TSSOP
I2C
8Pins
-
-
-40°C
85°C
-
2806834

RoHS

Each
1+
CNY24.900
(CNY28.137)
10+
CNY18.740
(CNY21.1762)
25+
CNY17.220
(CNY19.4586)
50+
CNY16.340
(CNY18.4642)
100+
CNY15.460
(CNY17.4698)
More Pricing...
Total:CNY24.90
Min: 1 / Mult: 1
I2C
HH:MM:SS:hh
Day; Date; Month; Year; Century
Alarm RTC
HH:MM:SS:hh
2.38V
5.5V
SOIC
SOIC
I2C
8Pins
-
-
-40°C
85°C
-
2775939RL

RoHS

Each (Supplied on Cut Tape)
Re-Reel
Packaging Options
100+
CNY5.850
(CNY6.6105)
250+
CNY5.500
(CNY6.215)
500+
CNY5.280
(CNY5.9664)
1000+
CNY4.910
(CNY5.5483)
2500+
CNY4.540
(CNY5.1302)
Total:CNY585.00
Min: 100 / Mult: 1
I2C
Binary
YYYY:MM:WK:DD:Hr:Min:Secs
Calendar, Clock
Binary
900mV
5.5V
TSSOP
TSSOP
I2C
8Pins
-
-
-40°C
85°C
-
2901506RL

RoHS

Each (Supplied on Cut Tape)
Re-Reel
Packaging Options
100+
CNY5.020
(CNY5.6726)
Total:CNY502.00
Min: 100 / Mult: 1
I2C
HH:MM:SS
Day; Date; Month; Year
Alarm RTC
HH:MM:SS
1.8V
5.5V
SOIC
SOIC
I2C
8Pins
-
-
-40°C
85°C
-
2983745RL

RoHS

Each (Supplied on Cut Tape)
Re-Reel
Packaging Options
100+
CNY13.180
(CNY14.8934)
250+
CNY12.810
(CNY14.4753)
500+
CNY12.560
(CNY14.1928)
1000+
CNY12.320
(CNY13.9216)
Total:CNY1,318.00
Min: 100 / Mult: 1
I2C
HH:MM:SS
Day; Date; Month; Year
Alarm RTC
HH:MM:SS
2.7V
5.5V
SOIC
SOIC
I2C
8Pins
-
-
-40°C
85°C
-
2775935RL

RoHS

Each (Supplied on Cut Tape)
Re-Reel
Packaging Options
50+
CNY5.120
(CNY5.7856)
250+
CNY4.430
(CNY5.0059)
1000+
CNY4.100
(CNY4.633)
2000+
CNY4.020
(CNY4.5426)
Total:CNY512.00
Min: 100 / Mult: 1
I2C
Binary
YYYY:MM:WK:DD:Hr:Min:Secs
Calendar, Clock
Binary
900mV
5.5V
DFN2626
DFN2626
I2C
10Pins
-
-
-40°C
85°C
-
2890041RL

RoHS

Each (Supplied on Cut Tape)
Re-Reel
Packaging Options
100+
CNY6.790
(CNY7.6727)
250+
CNY6.340
(CNY7.1642)
500+
CNY6.100
(CNY6.893)
1000+
CNY5.910
(CNY6.6783)
2500+
CNY5.710
(CNY6.4523)
Total:CNY679.00
Min: 100 / Mult: 1
I2C
HH:MM:SS
YY-MM-DD-dd
RTC
HH:MM:SS
1.8V
5.5V
TSSOP
TSSOP
I2C
8Pins
-
AEC-Q100
-40°C
105°C
AEC-Q100
2775934RL

RoHS

Each (Supplied on Cut Tape)
Re-Reel
Packaging Options
100+
CNY22.630
(CNY25.5719)
250+
CNY21.880
(CNY24.7244)
500+
CNY21.440
(CNY24.2272)
1000+
CNY21.020
(CNY23.7526)
Total:CNY2,263.00
Min: 100 / Mult: 1
I2C, SPI
Binary
YYYY:MM:WK:DD:Hr:Min:Secs
Calendar, Clock
Binary
1.8V
4.2V
SOIC
SOIC
I2C, SPI
16Pins
-
-
-40°C
85°C
-
2851655RL

RoHS

Each (Supplied on Cut Tape)
Re-Reel
Packaging Options
100+
CNY8.190
(CNY9.2547)
3300+
CNY7.340
(CNY8.2942)
Total:CNY819.00
Min: 100 / Mult: 1
I2C
HH:MM:SS
YY-MM-DD-dd
RTCC
HH:MM:SS
1.8V
5.5V
TDFN
TDFN
I2C
8Pins
-
-
-40°C
85°C
-
2806832RL

RoHS

Each (Supplied on Cut Tape)
Re-Reel
Packaging Options
100+
CNY18.060
(CNY20.4078)
250+
CNY17.920
(CNY20.2496)
500+
CNY17.780
(CNY20.0914)
1000+
CNY17.640
(CNY19.9332)
Total:CNY1,806.00
Min: 100 / Mult: 1
I2C
HH:MM:SS:hh
Day; Date; Month; Year; Century
Alarm RTC
HH:MM:SS:hh
2.7V
5.5V
SOIC
SOIC
I2C
8Pins
-
-
-40°C
85°C
-
3129609RL

RoHS

Each (Supplied on Cut Tape)
Re-Reel
Packaging Options
10+
CNY141.540
(CNY159.9402)
25+
CNY132.850
(CNY150.1205)
50+
CNY128.060
(CNY144.7078)
100+
CNY123.270
(CNY139.2951)
Total:CNY1,415.40
Min: 10 / Mult: 1
Parallel
HH:MM:SS
Day; Date; Month; Year; Century
RTC
HH:MM:SS
3V
3.6V
SOIC
SOIC
Parallel
44Pins
-
-
0°C
70°C
-
3378955RL

RoHS

Each (Supplied on Cut Tape)
Re-Reel
Packaging Options
100+
CNY6.070
(CNY6.8591)
250+
CNY5.710
(CNY6.4523)
500+
CNY5.480
(CNY6.1924)
1000+
CNY5.200
(CNY5.876)
2500+
CNY4.990
(CNY5.6387)
Total:CNY607.00
Min: 100 / Mult: 1
I2C
HH:MM:SS
YYYY-MM-DD
RTCC
HH:MM:SS
900mV
5.5V
TSSOP
TSSOP
I2C
8Pins
-
AEC-Q100
-40°C
105°C
AEC-Q100
3132494RL

RoHS

Each (Supplied on Cut Tape)
Re-Reel
Packaging Options
10+
CNY40.900
(CNY46.217)
25+
CNY37.850
(CNY42.7705)
50+
CNY37.090
(CNY41.9117)
100+
CNY36.330
(CNY41.0529)
250+
CNY35.570
(CNY40.1941)
More Pricing...
Total:CNY409.00
Min: 10 / Mult: 1
Serial, SPI
HH:MM:SS
Day; Date; Month; Year; Century
RTC
HH:MM:SS
2.38V
5.5V
QFN
QFN
Serial, SPI
16Pins
-
-
-40°C
85°C
-
3367096RL

RoHS

Each (Supplied on Cut Tape)
Re-Reel
Packaging Options
100+
CNY13.150
(CNY14.8595)
250+
CNY12.480
(CNY14.1024)
500+
CNY12.040
(CNY13.6052)
1000+
CNY11.730
(CNY13.2549)
Total:CNY1,315.00
Min: 100 / Mult: 1
I2C
HH:MM:SS:hh
Day; Date; Month; Year; Century
Alarm RTC
HH:MM:SS:hh
2V
5.5V
SOIC
SOIC
I2C
8Pins
-
-
-40°C
85°C
-
151-175 of 244 items
of 10 page(s)

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