Real Time Clocks (RTC)

Analog Devices Inc. Real-time Clocks (RTCs) are offered in a wide range of low-power, highly accurate, small packages, and MEMs-based ICs. RTC ICs measure time, even when the power of the main device is off, so an auxiliary battery or supercapacitor are required. Power consumption is a key factor in most RTC designs, but accuracy and small package size are also important. The latest RTC ICs reduce package pin count by supporting a serial interface.

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Description Datasheet Availability Pricing (CLP) Filter the results in the table by unit price based on your quantity.
Qty. RoHS ECAD Model RTC Bus Interface
Date Format
Time Format
Memory Size
Package / Case
Battery Backup Switching
Supply Voltage - Min
Supply Voltage - Max
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Maximum Operating Temperature
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Analog Devices / Maxim Integrated Real Time Clock I C RTC/Supervisor with Trickle Charger
Datasheet
433In Stock
Min.: 1
Mult.: 1
Max.: 406

I2C YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) 512 B SOIC-8 Backup Switching 4.5 V 5.5 V - 40 C + 85 C DS1388Z SMD/SMT Tube

Analog Devices / Maxim Integrated Real Time Clock Low-Voltage SPI/3-Wire RTCs with Trickle
Datasheet
865In Stock
Min.: 1
Mult.: 1
Max.: 875

Serial 3-Wire, SPI YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) uSOP-10 Backup Switching 2.97 V 5.5 V - 40 C + 85 C DS1390U SMD/SMT Tube
Analog Devices / Maxim Integrated Real Time Clock Low-Voltage SPI/3-Wire RTCs with Trickle
Datasheet
2.749In Stock
MouseReel Available
Min.: 1
Mult.: 1
Max.: 2.769

SPI YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) uSOP-10 Backup Switching 2.97 V 5.5 V - 40 C + 85 C DS1390U SMD/SMT Reel, Cut Tape, MouseReel
Analog Devices / Maxim Integrated Real Time Clock I C 32-Bit Binary Counter RTC
Datasheet
4.162In Stock
MouseReel Available
Min.: 1
Mult.: 1
Max.: 3.700
: 2.500

Serial 2-Wire, I2C Binary Binary SOIC-8 Backup Switching 2.97 V 3.63 V - 40 C + 85 C DS1672S SMD/SMT Reel, Cut Tape, MouseReel
Analog Devices / Maxim Integrated Real Time Clock Total-Elapsed-Time Recorder with Alarm
Datasheet
968In Stock
Min.: 1
Mult.: 1
Max.: 1.661

I2C Binary Binary 10 B SOIC-8 No Backup Switching 2.5 V 5.5 V - 40 C + 85 C DS1682 SMD/SMT Tube

Analog Devices / Maxim Integrated Real Time Clock 5ppm, I2C Real-Time Clock
Datasheet
1.052In Stock
Min.: 1
Mult.: 1
Max.: 1.052

I2C YY-MM-DD-dd HH:MM:SS (24 hr) SO-16 Backup Switching 2.3 V 5.5 V - 40 C + 85 C DS3231M SMD/SMT Tube

Analog Devices / Maxim Integrated Real Time Clock 5ppm, I2C Real-Time Clock
Datasheet
647In Stock
2.000Expected 10/27/2026
MouseReel Available
Min.: 1
Mult.: 1
Max.: 2.382

I2C YY-MM-DD-dd HH:MM:SS (24 hr) SO-16 Backup Switching 2.3 V 5.5 V - 40 C + 85 C DS3231M SMD/SMT Reel, Cut Tape, MouseReel
Analog Devices / Maxim Integrated Real Time Clock Extremely Accurate I C RTC with Integrat
Datasheet
168In Stock
Min.: 1
Mult.: 1
Max.: 168

I2C YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) 236 B SO-20 Backup Switching 2.3 V 5.5 V 0 C + 70 C DS3232S SMD/SMT Tube

Analog Devices / Maxim Integrated Real Time Clock Trickle-Charge Timekeeping Chip
Datasheet
233In Stock
Min.: 1
Mult.: 1
Max.: 233

Serial 3-Wire YY-MM-DD-dd HH:MM:SS (24 hr) 31 B PDIP-8 Backup Switching 2 V 5.5 V - 40 C + 85 C DS1302N Through Hole Tube

Analog Devices / Maxim Integrated Real Time Clock Serial Alarm Real-Time Clock
Datasheet
212In Stock
148Expected 11/2/2026
Min.: 1
Mult.: 1
Max.: 360

Serial 3-Wire, SPI YY-MM-DD HH:MM:SS (24 hr) 96 B TSSOP-20 Backup Switching 2 V 5.5 V 0 C + 70 C DS1305E SMD/SMT Tube

Analog Devices / Maxim Integrated Real Time Clock Serial Alarm Real-Time Clock
Datasheet
155In Stock
Min.: 1
Mult.: 1
Max.: 155

Serial 3-Wire, SPI YY-MM-DD HH:MM:SS (24 hr) 96 B DIP-16 Backup Switching 2 V 5.5 V 0 C + 70 C DS1306 Through Hole Tube
Analog Devices / Maxim Integrated Real Time Clock Low-Current I C RTC with 56-Byte NV RAM
Datasheet
91In Stock
Min.: 1
Mult.: 1
Max.: 91

I2C YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) 56 B uSOP-8 Backup Switching 2.7 V 5.5 V - 40 C + 85 C DS1308U SMD/SMT Tube

Analog Devices / Maxim Integrated Real Time Clock Low-Current I C RTC with 56-Byte NV RAM
Datasheet
299In Stock
Min.: 1
Mult.: 1
Max.: 299

I2C YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) 56 B uSOP-8 Backup Switching 3 V 5.5 V - 40 C + 85 C DS1308U SMD/SMT Tube
Analog Devices / Maxim Integrated Real Time Clock I C Serial Real-Time Clock
Datasheet
152In Stock
250Expected 9/7/2026
Min.: 1
Mult.: 1
Max.: 402

I2C YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) uSOP-8 No Backup Switching 1.8 V 5.5 V - 40 C + 85 C DS1337U SMD/SMT Tube

Analog Devices / Maxim Integrated Real Time Clock I C Serial Real-Time Clock
Datasheet
545In Stock
3.000Expected 9/7/2026
MouseReel Available
Min.: 1
Mult.: 1
Max.: 3.063

I2C YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) uSOP-8 No Backup Switching 1.8 V 5.5 V - 40 C + 85 C DS1337U SMD/SMT Reel, Cut Tape, MouseReel

Analog Devices / Maxim Integrated Real Time Clock I C RTC with 56-Byte NV RAM
Datasheet
58In Stock
Min.: 1
Mult.: 1
Max.: 58

Serial 2-Wire, I2C YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) 56 B uSOP-8 Backup Switching 1.71 V 1.89 V - 40 C + 85 C DS1338U SMD/SMT Tube

Analog Devices / Maxim Integrated Real Time Clock I C RTC with 56-Byte NV RAM
Datasheet
269In Stock
Min.: 1
Mult.: 1
Max.: 269

I2C YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) 56 B uSOP-8 Backup Switching 2.7 V 3.3 V - 40 C + 85 C DS1338U SMD/SMT Tube
Analog Devices / Maxim Integrated Real Time Clock I C RTC with 56-Byte NV RAM
Datasheet
99In Stock
400On Order
Min.: 1
Mult.: 1
Max.: 499

I2C YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) 56 B uSOP-8 Backup Switching 3 V 5.5 V - 40 C + 85 C DS1338U SMD/SMT Tube

Analog Devices / Maxim Integrated Real Time Clock Low-Current, I C, Serial Real-Time Clock
Datasheet
292In Stock
Min.: 1
Mult.: 1
Max.: 292

Serial 2-Wire, I2C YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) uSOP-8 Backup Switching 1.71 V 5.5 V - 40 C + 85 C DS1339AU SMD/SMT Tube

Analog Devices / Maxim Integrated Real Time Clock SERIAL RTC 1.8-3.3V HESR USOP TRL
Datasheet
25In Stock
Min.: 1
Mult.: 1
Max.: 7

Serial 2-Wire, I2C YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) 7 B uSOP-8 Backup Switching 2.7 V 3.3 V - 40 C + 85 C DS1339BU SMD/SMT Tube

Analog Devices / Maxim Integrated Real Time Clock I C Serial Real-Time Clock
Datasheet
239In Stock
250Expected 9/7/2026
Min.: 1
Mult.: 1
Max.: 489

Serial 2-Wire, I2C YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) uSOP-8 Backup Switching 1.8 V 2.2 V - 40 C + 85 C DS1339U SMD/SMT Tube
Analog Devices / Maxim Integrated Real Time Clock I C RTC with Trickle Charger
Datasheet
239In Stock
Min.: 1
Mult.: 1
Max.: 239

I2C YY-MM-DD-dd HH:MM:SS (24 hr) uSOP-8 Backup Switching 2.97 V 5.5 V - 40 C + 85 C DS1340U SMD/SMT Tube
Analog Devices / Maxim Integrated Real Time Clock Low-Current I C RTCs for High-ESR Crystals
Datasheet
121In Stock
Min.: 1
Mult.: 1
Max.: 121

I2C YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) uSOP-8 No Backup Switching 1.8 V 5.5 V - 40 C + 85 C DS1341U SMD/SMT Tube

Analog Devices / Maxim Integrated Real Time Clock Low-Current SPI/3-Wire RTCs
Datasheet
17In Stock
Min.: 1
Mult.: 1
Max.: 17

Serial 3-Wire, SPI YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) 96 B TSSOP-20 Backup Switching 2.7 V 5.5 V - 40 C + 85 C DS1343E SMD/SMT Tube

Analog Devices / Maxim Integrated Real Time Clock Low-Current SPI/3-Wire RTCs
Datasheet
199In Stock
Min.: 1
Mult.: 1
Max.: 199

Serial 3-Wire, SPI YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) 96 B TSSOP-20 Backup Switching 3 V 5.5 V - 40 C + 85 C DS1344E SMD/SMT Tube