Real Time Clocks:

470 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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2775929

RoHS

Each (Supplied on Cut Tape)
Cut Tape
Packaging Options
1+
CNY6.610
(CNY7.4693)
10+
CNY4.280
(CNY4.8364)
50+
CNY4.020
(CNY4.5426)
100+
CNY3.780
(CNY4.2714)
250+
CNY3.770
(CNY4.2601)
More Pricing...
Min: 1 / Mult: 1
YY-MM-DD-DW
HH:MM:SS: 24Hr
Calendar, Clock
1V
5.5V
SOIC
8Pins
I2C
-40°C
85°C
-
-
2775929RL

RoHS

Each (Supplied on Cut Tape)
Re-Reel
Packaging Options
100+
CNY3.780
(CNY4.2714)
250+
CNY3.770
(CNY4.2601)
500+
CNY3.760
(CNY4.2488)
1000+
CNY3.750
(CNY4.2375)
2500+
CNY3.740
(CNY4.2262)
Min: 100 / Mult: 1
YY-MM-DD-DW
HH:MM:SS: 24Hr
Calendar, Clock
1V
5.5V
SOIC
8Pins
I2C
-40°C
85°C
-
-
3592268

RoHS

Each (Supplied on Full Reel)
Full Reel
2500+
CNY11.490
(CNY12.9837)
7500+
CNY10.050
(CNY11.3565)
Min: 2500 / Mult: 2500
YY-MM-DD-dd
HH:MM:SS:hh
RTCC
1.8V
3.6V
MSOP
10Pins
SPI
-40°C
85°C
-
-
1823155

RoHS

Each
1+
CNY11.020
(CNY12.4526)
25+
CNY9.640
(CNY10.8932)
100+
CNY7.990
(CNY9.0287)
Min: 1 / Mult: 1
DD:MM:YY
HH:MM:SS
RTC
1.8V
5.5V
SOIC
8Pins
I2C
-40°C
85°C
MCP79410 MCP79411 MCP79412
AEC-Q100
2361122

RoHS

Each
1+
CNY8.930
(CNY10.0909)
25+
CNY7.820
(CNY8.8366)
100+
CNY6.470
(CNY7.3111)
Min: 1 / Mult: 1
YYYY:MM:WK:DD:Hr:Min:Secs
12Hr / 24Hr
Alarm RTC
1.8V
5.5V
SOIC
8Pins
I2C
-40°C
85°C
-
AEC-Q100
2361119

RoHS

Each
1+
CNY7.650
(CNY8.6445)
25+
CNY7.060
(CNY7.9778)
100+
CNY6.700
(CNY7.571)
Min: 1 / Mult: 1
YYYY:MM:WK:DD:Hr:Min:Secs
12Hr / 24Hr
Alarm RTC
1.8V
5.5V
SOIC
8Pins
I2C
-40°C
85°C
-
-
2400452RL

RoHS

Each (Supplied on Cut Tape)
Re-Reel
Packaging Options
100+
CNY5.600
(CNY6.328)
250+
CNY5.500
(CNY6.215)
500+
CNY5.410
(CNY6.1133)
1000+
CNY5.320
(CNY6.0116)
2500+
CNY5.220
(CNY5.8986)
Min: 100 / Mult: 1
YYYY:MM:WK:DD:Hr:Min:Secs
Binary
Calendar, Clock
1.2V
5.5V
SOIC
8Pins
I2C
-40°C
85°C
-
-
2515431

RoHS

Each
1+
CNY126.860
(CNY143.3518)
14+
CNY123.720
(CNY139.8036)
28+
CNY120.570
(CNY136.2441)
112+
CNY112.070
(CNY126.6391)
252+
CNY108.710
(CNY122.8423)
More Pricing...
Min: 1 / Mult: 1
Day; Date; Month; Year; Century
HH:MM:SS
Alarm RTC
4.5V
5.5V
EDIP
24Pins
Multiplexed
0°C
70°C
-
-
2427483

RoHS

Each (Supplied on Cut Tape)
Cut Tape
Packaging Options
1+
CNY10.540
(CNY11.9102)
10+
CNY5.750
(CNY6.4975)
100+
CNY3.990
(CNY4.5087)
500+
CNY3.600
(CNY4.068)
1000+
CNY3.260
(CNY3.6838)
More Pricing...
Min: 1 / Mult: 1
YYYY:MM:WK:DD:Hr:Min:Secs
Binary
Calendar, Clock
900mV
5.5V
HWSON
8Pins
I2C
-40°C
85°C
-
-
2427480

RoHS

Each (Supplied on Cut Tape)
Cut Tape
Packaging Options
1+
CNY38.090
(CNY43.0417)
10+
CNY32.270
(CNY36.4651)
25+
CNY29.350
(CNY33.1655)
50+
CNY28.460
(CNY32.1598)
100+
CNY27.570
(CNY31.1541)
More Pricing...
Min: 1 / Mult: 1
YYYY:MM:WK:DD:Hr:Min:Secs
Binary
Calendar, Clock
1.8V
4.2V
SOIC
16Pins
I2C, SPI
-40°C
85°C
-
-
2518948

RoHS

Each
1+
CNY57.370
(CNY64.8281)
Min: 1 / Mult: 1
DD:MM:YYYY
HH:MM:SS
RTC
2.3V
5.5V
WSOIC
16Pins
I2C
-40°C
85°C
-
-
2400452

RoHS

Each (Supplied on Cut Tape)
Cut Tape
Packaging Options
1+
CNY9.720
(CNY10.9836)
10+
CNY6.420
(CNY7.2546)
50+
CNY6.320
(CNY7.1416)
100+
CNY5.600
(CNY6.328)
250+
CNY5.500
(CNY6.215)
More Pricing...
Min: 1 / Mult: 1
YYYY:MM:WK:DD:Hr:Min:Secs
Binary
Calendar, Clock
1.2V
5.5V
SOIC
8Pins
I2C
-40°C
85°C
-
-
2518671

RoHS

Each
1+
CNY90.290
(CNY102.0277)
14+
CNY88.060
(CNY99.5078)
28+
CNY85.830
(CNY96.9879)
112+
CNY79.420
(CNY89.7446)
252+
CNY76.680
(CNY86.6484)
More Pricing...
Min: 1 / Mult: 1
YYYY:MM:DD:Hr:Min:Secs
12Hr / 24Hr
RTC
4.5V
5.5V
EDIP
24Pins
Multiplexed
0°C
70°C
-
-
2518949

RoHS

Each
1+
CNY98.570
(CNY111.3841)
10+
CNY72.580
(CNY82.0154)
36+
CNY66.600
(CNY75.258)
108+
CNY60.700
(CNY68.591)
252+
CNY59.550
(CNY67.2915)
More Pricing...
Min: 1 / Mult: 1
DD:MM:YY
HH:MM:SS
RTC
2.3V
5.5V
SOIC
20Pins
I2C
-40°C
85°C
-
-
2890042

RoHS

Each (Supplied on Cut Tape)
Cut Tape
Packaging Options
1+
CNY5.830
(CNY6.5879)
10+
CNY3.730
(CNY4.2149)
100+
CNY3.640
(CNY4.1132)
500+
CNY3.540
(CNY4.0002)
1000+
CNY3.440
(CNY3.8872)
More Pricing...
Min: 1 / Mult: 1
YY-MM-DD-DW
HH:MM:SS: 12Hr / 24Hr
Calendar, Clock
900mV
5.5V
SOIC
8Pins
I2C
-40°C
85°C
-
-
2775937

RoHS

Each (Supplied on Cut Tape)
Cut Tape
Packaging Options
5+
CNY4.080
(CNY4.6104)
50+
CNY3.770
(CNY4.2601)
100+
CNY3.460
(CNY3.9098)
500+
CNY3.320
(CNY3.7516)
1000+
CNY3.160
(CNY3.5708)
Min: 5 / Mult: 5
YYYY:MM:WK:DD:Hr:Min:Secs
Binary
Calendar, Clock
900mV
5.5V
TSSOP
8Pins
I2C
-40°C
85°C
-
-
2798763

RoHS

Each (Supplied on Cut Tape)
Cut Tape
Packaging Options
1+
CNY83.890
(CNY94.7957)
10+
CNY68.670
(CNY77.5971)
25+
CNY61.640
(CNY69.6532)
100+
CNY57.030
(CNY64.4439)
250+
CNY54.830
(CNY61.9579)
More Pricing...
Min: 1 / Mult: 1
Day; Date; Month; Year
HH:MM:SS
RTC
2V
5.5V
SOIC
20Pins
SPI
-40°C
85°C
-
-
2798759

RoHS

Each (Supplied on Cut Tape)
Cut Tape
Packaging Options
1+
CNY81.290
(CNY91.8577)
10+
CNY63.720
(CNY72.0036)
25+
CNY59.330
(CNY67.0429)
100+
CNY54.440
(CNY61.5172)
250+
CNY52.130
(CNY58.9069)
More Pricing...
Min: 1 / Mult: 1
Day; Date; Month; Year
HH:MM:SS
RTC
2.3V
5.5V
SOIC
16Pins
I2C
0°C
70°C
-
-
2841031

RoHS

Each (Supplied on Cut Tape)
Cut Tape
Packaging Options
1+
CNY11.620
(CNY13.1306)
10+
CNY7.730
(CNY8.7349)
50+
CNY7.300
(CNY8.249)
100+
CNY6.870
(CNY7.7631)
250+
CNY6.450
(CNY7.2885)
More Pricing...
Min: 1 / Mult: 1
DD:MM:YY
HH:MM:SS
Alarm RTC
1.8V
5.5V
SOIC
8Pins
I2C
-40°C
85°C
-
-
2361118

RoHS

Each
1+
CNY7.650
(CNY8.6445)
25+
CNY7.060
(CNY7.9778)
100+
CNY6.700
(CNY7.571)
Min: 1 / Mult: 1
YYYY:MM:WK:DD:Hr:Min:Secs
12Hr / 24Hr
Alarm RTC
1.8V
5.5V
SOIC
8Pins
I2C
-40°C
85°C
-
-
2400446

RoHS

Each (Supplied on Cut Tape)
Cut Tape
Packaging Options
1+
CNY15.230
(CNY17.2099)
10+
CNY10.240
(CNY11.5712)
50+
CNY9.690
(CNY10.9497)
100+
CNY9.140
(CNY10.3282)
250+
CNY8.610
(CNY9.7293)
More Pricing...
Min: 1 / Mult: 1
YYYY:MM:WK:DD:Hr:Min:Secs
Binary
Calendar, Clock
1.8V
5.5V
TSSOP
8Pins
I2C
-40°C
125°C
-
-
2515451

RoHS

Each (Supplied on Cut Tape)
Cut Tape
Packaging Options
1+
CNY34.130
(CNY38.5669)
10+
CNY26.000
(CNY29.380)
25+
CNY23.980
(CNY27.0974)
100+
CNY21.390
(CNY24.1707)
250+
CNY19.520
(CNY22.0576)
More Pricing...
Min: 1 / Mult: 1
Day; Date; Month; Year
HH:MM:SS
RTC
2V
5.5V
NSOIC
8Pins
Serial
0°C
70°C
-
-
2400451

RoHS

Each (Supplied on Cut Tape)
Cut Tape
Packaging Options
1+
CNY24.240
(CNY27.3912)
Min: 1 / Mult: 1
YYYY:MM:WK:DD:Hr:Min:Secs
Binary
Calendar, Clock
1.8V
4.2V
SOIC
16Pins
I2C, SPI
-40°C
85°C
-
-
2400454

RoHS

Each (Supplied on Cut Tape)
Cut Tape
Packaging Options
1+
CNY12.780
(CNY14.4414)
10+
CNY8.520
(CNY9.6276)
50+
CNY8.050
(CNY9.0965)
100+
CNY7.580
(CNY8.5654)
250+
CNY7.500
(CNY8.475)
More Pricing...
Min: 1 / Mult: 1
YYYY:MM:WK:DD:Hr:Min:Secs
Binary
Calendar, Clock
1V
5.5V
TSSOP
8Pins
I2C
-40°C
85°C
-
-
2849895

RoHS

Each (Supplied on Cut Tape)
Cut Tape
Packaging Options
1+
CNY116.310
(CNY131.4303)
Min: 1 / Mult: 1
YY-MM-DD-dd
HH:MM:SS
Calendar, Clock
4.5V
5.5V
SOIC
28Pins
Parallel
0°C
70°C
-
-
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