Maxim Integrated Datasheets for IC Clocks

IC clocks are semiconductor integrated circuits (ICs) that are designed to keep time.
IC Clocks: Learn more

Product Name Notes
2M x 8 NV SRAM with Phantom Clock -- DS1254 2M x 8 NV SRAM with Phantom Clock
4 1/2 Digit, LCD, High-Speed Counter Decoder Driver -- ICM7224 4 1/2-Digit, LCD, High-Speed Counter/Decoder/Driver
4 1/2 Digit, LCD, High-Speed Counter Decoder Driver -- ICM7225 4 1/2-Digit, LED, High-Speed Counter/Decoder/Driver
I2C-Compatible RTC with 56-Byte NV RAM -- DS1338 I2C-Compatible RTC with 56-Byte NV RAM
Low-Current SPI/3-Wire RTCs -- DS1344 Low-Current SPI RTC for 12.5pF High-ESR Crystals
Low-Current SPI/3-Wire RTCs -- DS1343 Low-Current SPI RTC for 6pF High-ESR Crystals
8-Bit Programmable Timing Element -- DS1023-100
8-Bit Programmable Timing Element -- DS1023-200
8-Bit Programmable Timing Element -- DS1023-25
8-Bit Programmable Timing Element -- DS1023-50
8-Bit Programmable Timing Element -- DS1023-500
The DS1023 is an 8-bit programmable delay line similar in function to the DS1020/DS1021. Additional features have been added to extend the range of applications: The internal delay line architecture...
Spread-Spectrum Crystal Multiplier -- DS1080CL The DS1080CL is a low-jitter, crystal-based clock generator with an integrated phase-locked loop (PLL) to generate spread-spectrum clock outputs from 8MHz to 64MHz. The device is pin programmable to select...
Spread-Spectrum Crystal Multiplier -- DS1080L The DS1080L is a low-jitter, crystal-based clock generator with an integrated phase-locked loop (PLL) to generate spread-spectrum clock outputs from 16MHz to 134MHz. The device is pin-programmable to select the...
Spread-Spectrum Clock Modulator for LCD Panels -- DS1081L The DS1081L is a spread-spectrum clock modulator IC that reduces EMI in high clock-frequency-based, digital electronic equipment. Using an integrated phase-locked loop (PLL), the DS1081L accepts an input clock signal...
5-Tap Economy Timing Element (Delay Line) -- DS1100 The DS1100 series delay lines have five equally spaced taps providing delays from 4ns to 500ns. These devices are offered in surface-mount packages to save PCB area. Low cost and...
3-Volt 5-Tap Economy Timing Element (Delay Line) -- DS1100L The DS1100L is a 3.3V version of the DS1100. It is characterized for operation over the range 3.0V to 3.6V. The DS1100L series delay lines have five equally spaced taps...
10-Tap Silicon Delay Line -- DS1110 The DS1110 delay line is an improved replacement for the DS1010. It has ten equally spaced taps providing delays from 5ns to 500ns. The devices are offered in a standard...
3V 10-Tap Silicon Delay Line -- DS1110L The DS1110L 10-tap delay line is a 3V version of the DS1110. It has 10 equally spaced taps providing delays from 10ns to 500ns. The DS1110L series delay lines provide...
3.3V, 8-Bit, Programmable Timing Element -- DS1123L The DS1123L is an 8-bit programmable timing element similar in function to the DS1023, but operating at 3.3V. Like the DS1023, the DS1123L can delay signals up to a full...
5.0V 8-Bit Programmable Timing Element -- DS1124 The DS1124 is an 8-bit programmable timing element similar in function to the DS1021-25. The 256-delay intervals are programmed by using a 3-wire serial interface. With a 0.25ns step size,...
3-in-1 High-Speed Silicon Delay Line -- DS1135 The DS1135 series is a low-power, +5V high-speed version of the popular DS1013 and DS1035. The DS1135 series of delay lines have three independent logic buffered delays in a single...
3-Volt 3-in-1 High-Speed Silicon Delay Line -- DS1135L The DS1135L series is a low-power, 3V high-speed version of the popular DS1013, DS1033, and DS1035 series. The DS1135L series of delay lines have three independent logic buffered delays in...
20MHz to 134MHz Spread-Spectrum Clock Modulator for LCD Panels -- DS1181L The DS1181L is a spread-spectrum clock modulator IC that reduces EMI in high clock-frequency-based, digital electronic equipment. Using an integrated phase-locked loop (PLL), the DS1181L accepts an input clock signal...
SmartWatch RAM DS1216B/C/D/HSmartWatch ROM DS1216E/F -- DS1216B
SmartWatch RAM DS1216B/C/D/HSmartWatch ROM DS1216E/F -- DS1216C
SmartWatch RAM DS1216B/C/D/HSmartWatch ROM DS1216E/F -- DS1216D
SmartWatch RAM DS1216B/C/D/HSmartWatch ROM DS1216E/F -- DS1216E
SmartWatch RAM DS1216B/C/D/HSmartWatch ROM DS1216E/F -- DS1216F
SmartWatch RAM DS1216B/C/D/HSmartWatch ROM DS1216E/F -- DS1216H
The DS1216 SmartWatch RAM and SmartWatch ROM sockets are 600-mil-wide DIP sockets with a built-in CMOS watch function, an NV RAM controller circuit, and an embedded lithium energy source. The...
64K NV SRAM with Phantom Clock -- DS1243
64K NV SRAM with Phantom Clock -- DS1243Y
The DS1243Y 64K NV SRAM with Phantom Clock is a fully static nonvolatile RAM (organized as 8192 words by 8 bits) with a built-in real time clock. The DS1243Y has...
256k NV SRAM with Phantom Clock -- DS1244 The DS1244 256k NV SRAM with a Phantom clock is a fully static nonvolatile RAM (NV SRAM) (organized as 32k words by 8 bits) with a built-in real-time clock. The...
1024K NV SRAM with Phantom Clock -- DS1248 The DS1248 1024K NV SRAM with Phantom Clock is a fully static nonvolatile RAM (organized as 128K words by 8 bits) with a built-in real-time clock. The DS1248 has a...
4096K NV SRAM with Phantom Clock -- DS1251 The DS1251 4096K NV SRAM with Phantom Clock is a fully static nonvolatile RAM (organized as 512K words by 8 bits) with a built-in real-time clock. The DS1251Y has a...
Real-Time Clocks -- DS12885
Real-Time Clocks -- DS12887
Real-Time Clocks -- DS12887A
Real-Time Clocks -- DS12C887
Real-Time Clocks -- DS12C887A
The DS12885, DS12887, and DS12C887 real-time clocks (RTCs) are designed to be direct replacements for the DS1285 and DS1287. The devices provide a real-time clock/calendar, one time-of-day alarm, three maskable...
RTCs with Constant-Voltage Trickle Charger -- DS12CR887
RTCs with Constant-Voltage Trickle Charger -- DS12R885
RTCs with Constant-Voltage Trickle Charger -- DS12R887
The DS12R885 is a functional drop-in replacement for the DS12885 real-time clock (RTC). The device provides an RTC/calendar, one time-of-day alarm, three maskable interrupts with a common interrupt output, a...
Trickle-Charge Timekeeping Chip -- DS1302 The DS1302 trickle-charge timekeeping chip contains a real-time clock/calendar and 31 bytes of static RAM. It communicates with a microprocessor via a simple serial interface. The real-time clock/calendar provides seconds,...
Serial Alarm Real-Time Clock -- DS1305 The DS1305 serial alarm real-time clock provides a full binary coded decimal (BCD) clock calendar that is accessed by a simple serial interface. The clock/calendar provides seconds, minutes, hours, day,...
Serial Alarm Real-Time Clock -- DS1306 The DS1306 serial alarm real-time clock (RTC) provides a full binary coded decimal (BCD) clock calendar that is accessed by a simple serial interface. The clock/calendar provides seconds, minutes, hours,...
64 x 8, Serial, I²C Real-Time Clock -- DS1307 The DS1307 serial real-time clock (RTC) is a low-power, full binary-coded decimal (BCD) clock/calendar plus 56 bytes of NV SRAM. Address and data are transferred serially through an I²C, bidirectional...
Low-Current I²C RTC with 56-Byte NV RAM -- DS1308 The DS1308 serial real-time clock (RTC) is a low-power, full binary-coded decimal (BCD) clock/calendar plus 56 bytes of NV RAM. Address and data are transferred serially through an I²C interface.
Phantom Time Chip -- DS1315 The DS1315 Phantom Time Chip is a combination of a CMOS timekeeper and a nonvolatile memory controller. In the absence of power, an external battery maintains the timekeeping operation and...
Parallel-Interface Elapsed Time Counter -- DS1318 The DS1318 parallel-interface elapsed time counter (ETC) is a 44-bit counter that maintains the amount of time that the device operates from main and/or backup power or during an external...
I²C Serial Real-Time Clock -- DS1337
I²C Serial Real-Time Clock -- DS1337C
The DS1337 serial real-time clock is a low-power clock/calendar with two programmable time-of-day alarms and a programmable square-wave output. Address and data are transferred serially through an I²C bus. The...
I²C RTC with 56-Byte NV RAM -- DS1338C
I²C RTC with 56-Byte NV RAM -- DS1338U
I²C RTC with 56-Byte NV RAM -- DS1338Z
The DS1338 serial real-time clock (RTC) is a low-power, full binary-coded decimal (BCD) clock/calendar plus 56 bytes of NV SRAM. Address and data are transferred serially through an I²C interface.
I²C Serial Real-Time Clock -- DS1339
I²C Serial Real-Time Clock -- DS1339C
The DS1339 serial real-time clock (RTC) is a low-power clock/date device with two programmable time-of-day alarms and a programmable square-wave output. Address and data are transferred serially through an I²C...
Low-Current, I²C, Serial Real-Time Clock -- DS1339A The DS1339A serial real-time clock (RTC) is a low-power clock/date device with two programmable time-of-day alarms and a programmable square-wave output. Address and data are transferred serially through an I²C...
Low-Current, I 2C, Serial Real-Time Clock for High-ESR Crystals -- DS1339B The DS1339B serial real-time clock (RTC) is a low-power clock/date device with two programmable time-of-day alarms and a programmable square-wave output. Address and data are transferred serially through an I²C...
I²C RTC with Trickle Charger -- DS1340
I²C RTC with Trickle Charger -- DS1340C
The DS1340 is a real-time clock (RTC)/calendar that is pin compatible and functionally equivalent to the ST M41T00, including the software clock calibration. The device additionally provides trickle-charge capability on...
Low-Current I²C RTCs for High-ESR Crystals -- DS1341
Low-Current I²C RTCs for High-ESR Crystals -- DS1342
The DS1341/DS1342 low-current real-time clocks (RTCs) are timekeeping devices that provide an extremely low standby current, which permits longer life from a power supply. The DS1341/DS1342 support high-ESR crystals, which...
Low-Current, SPI-Compatible Real-Time Clock -- DS1347 The DS1347 SPI-compatible real-time clock (RTC) contains a real-time clock/calendar and 31 x 8 bits of static random-access memory (SRAM). The real-time clock/calendar provides seconds, minutes, hours, day, date, month,...
I²C, 32-Bit Binary Counter Watchdog Clock -- DS1371 The DS1371 is a 32-bit binary counter that is designed to continuously count time in seconds. An additional counter that can generate a periodic alarm or serve as a watchdog...
I²C, 32-Bit, Binary Counter Clock with 64-Bit ID -- DS1372 The DS1372 is a 32-bit binary up counter and 24-bit down counter with a unique 64-bit ID. The counters, ID, configuration, and status registers are accessed using an I²C serial...
I²C, 32-Bit Binary Counter Watchdog RTC with Trickle Charger and Reset Input/Output -- DS1374C
I²C, 32-Bit Binary Counter Watchdog RTC with Trickle Charger and Reset Input/Output -- DS1374U
The DS1374 is a 32-bit binary counter designed to continuously count time in seconds. An additional counter generates a periodic alarm or serves as a watchdog timer. If disabled, this...
I²C Digital Input RTC with Alarm -- DS1375 The DS1375 digital real-time clock (RTC) is a low-power clock/calendar that does not require a crystal. The device operates from a digital clock input pin at one of four frequencies:...
I²C RTC/Supervisor with Trickle Charger and 512 Bytes EEPROM -- DS1388 The DS1388 I²C real-time clock (RTC), supervisor, and EEPROM is a multifunction device that provides a clock/calendar, programmable watchdog timer, power-supply monitor with reset, and 512 bytes of EEPROM. The...
Y2K-Compliant Watchdog RTC with NV Control -- DS1500 The DS1500 is a full-function, year 2000-compliant, real-time clock/calendar (RTC) with an alarm, watchdog timer, power-on reset, battery monitors, 256 bytes of on-board nonvolatile (NV) SRAM, NV control for backing...
Y2K-Compliant Watchdog Real-Time Clocks -- DS1501
Y2K-Compliant Watchdog Real-Time Clocks -- DS1511
The DS1501/DS1511 are full-function, year 2000-compliant real-time clock/calendars (RTCs) with an RTC alarm, watchdog timer, power-on reset, battery monitors, 256 bytes NV SRAM, and a 32.768kHz output. User access to...
64kB, Nonvolatile, Year-2000-Compliant Timekeeping RAM -- DS1553
64kB, Nonvolatile, Year-2000-Compliant Timekeeping RAM -- DS1553P
The DS1553 is a full-function, year-2000-compliant (Y2KC) real-time clock/calendar (RTC) with an RTC alarm, watchdog timer, power-on reset, battery monitor, and "8k x 8 nonvolatile static RAM (NV SRAM)." User...
256k Nonvolatile, Y2K-Compliant Timekeeping RAM -- DS1554 The DS1554 is a full-function, year 2000-compliant (Y2KC), real-time clock/calendar (RTC) with an RTC alarm, watchdog timer, power-on reset, battery monitor, and 32k x 8 nonvolatile static RAM. User access...
1M, Nonvolatile, Y2K-Compliant Timekeeping RAM -- DS1556
1M, Nonvolatile, Y2K-Compliant Timekeeping RAM -- DS1556P
The DS1556 is a full-function, year-2000-compliant (Y2KC), real-time clock/calendar (RTC) with an RTC alarm, watchdog timer, power-on reset, battery monitor, and 128k x 8 nonvolatile static RAM. User access to...
4Meg, Nonvolatile, Y2K-Compliant Timekeeping RAM -- DS1557 The DS1557 is a full-function, year-2000-compliant (Y2KC), real-time clock/calendar (RTC) with an RTC alarm, watchdog timer, power-on reset, battery monitor, and 512k x 8 nonvolatile static RAM. User access to...
Watchdog Clocks with NV RAM Control -- DS1558W
Watchdog Clocks with NV RAM Control -- DS1558Y
The DS1558 is a full function, year 2000-compliant (Y2KC), real-time clock/calendar with an RTC alarm, watchdog timer, power-on reset, battery monitor, and NV SRAM controller. User access to all registers...
Nonvolatile Timekeeping RAM -- DS1642 The DS1642 is a 2k x 8 nonvolatile static RAM and a full-function real-time clock (RTC), both of which are accessible in a bytewide format. The nonvolatile time keeping RAM...
Nonvolatile Timekeeping RAM -- DS1643
Nonvolatile Timekeeping RAM -- DS1643P
The DS1643 is an 8K x 8 nonvolatile static RAM with a full function Real Time Clock (RTC) that are both accessible in a byte-wide format. The nonvolatile timekeeping RAM...
Portable System Controller -- DS1670 The DS1670 portable system controller is a circuit that incorporates many of the functions necessary for low-power portable products integrated into one chip. The device provides a real-time clock (RTC),...
I²C 32-Bit Binary Counter RTC -- DS1672 The DS1672 low-voltage serial timekeeping chip incorporates a 32-bit counter and power-monitoring functions. The 32-bit counter is designed to count seconds and can be used to derive time-of-day, week, month,...
Portable System Controller -- DS1673 The DS1673 portable system controller is a circuit that incorporates many of the functions necessary for low-power portable products integrated into one chip. The device provides a real-time clock (RTC),...
Portable System Controller -- DS1677 The DS1677 portable system controller is a circuit that incorporates many of the functions necessary for low-power portable products integrated into one chip. The device provides a real-time clock (RTC),...
Real-Time Event Recorder -- DS1678 The DS1678 real-time clock (RTC) event recorder records the time and date of a nonperiodic, asynchronous event each time the active-low INT pin is activated. The device records the seconds,...
Total-Elapsed-Time Recorder with Alarm -- DS1682 The DS1682 is an integrated elapsed-time recorder containing a factory-calibrated, temperature-compensated RC time base that eliminates the need for an external crystal. Using EEPROM technology to maintain data in the...
Total-Elapsed-Time and Event Recorder with Alarm -- DS1683 The DS1683 is an integrated elapsed-time recorder containing a factory-calibrated, low-temperature-coefficient RC time base that eliminates the need for an external crystal. Using EEPROM technology to maintain data in the...
3V/5V Real-Time Clock -- DS1685
3V/5V Real-Time Clock -- DS1687
The DS1685/DS1687 are real-time clocks (RTCs) designed as successors to the industry-standard DS1285,DS1385, DS1485, and DS1585 PC RTCs. These devices provide the industry-standard DS1285 clock function with either +3.0V or...
3V/5V Real-Time Clocks -- DS17285
3V/5V Real-Time Clocks -- DS17287
3V/5V Real-Time Clocks -- DS17485
3V/5V Real-Time Clocks -- DS17487
3V/5V Real-Time Clocks -- DS17885
3V/5V Real-Time Clocks -- DS17887
The DS17285, DS17485, DS17885, DS17287, DS17487, and DS17887 real-time clocks (RTCs) are designed to be successors to the industry-standard DS12885 and DS12887. The DS17285, DS17485, and DS17885 (hereafter referred to...
Y2KC Nonvolatile Timekeeping RAM -- DS1742 The DS1742 is a full-function, year 2000-compliant (Y2KC), real-time clock/calendar (RTC) and 2k x 8 nonvolatile static RAM. User access to all registers within the DS1742 is accomplished with a...
Y2K-Compliant, Nonvolatile Timekeeping RAMs -- DS1743
Y2K-Compliant, Nonvolatile Timekeeping RAMs -- DS1743P
The DS1743 is a full-function, year-2000-compliant (Y2KC), real-time clock/calendar (RTC) and 8k x 8 nonvolatile static RAM. User access to all registers within the DS1743 is accomplished with a bytewide...
Y2K-Compliant, Nonvolatile Timekeeping RAMs -- DS1744
Y2K-Compliant, Nonvolatile Timekeeping RAMs -- DS1744P
The DS1744 is a full-function, year-2000-compliant (Y2KC), real-time clock/calendar (RTC) and 32k x 8 NV SRAM. User access to all registers within the DS1744 is accomplished with a byte-wide interface...
Y2K-Compliant, Nonvolatile Timekeeping RAMs -- DS1746
Y2K-Compliant, Nonvolatile Timekeeping RAMs -- DS1746P
The DS1746 is a full-function, year-2000-compliant (Y2KC), real-time clock/calendar (RTC) and 128k x 8 nonvolatile static RAM. User access to all registers within the DS1746 is accomplished with a byte-wide...
Y2K-Compliant, Nonvolatile Timekeeping RAMs -- DS1747
Y2K-Compliant, Nonvolatile Timekeeping RAMs -- DS1747P
The DS1747 is a full-function, year-2000-compliant (Y2KC), real-time clock/calendar (RTC) and 512k x 8 nonvolatile static RAM. User access to all registers within the DS1747 is accomplished with a byte-wide...
1-Wire Time Chip With Interrupt -- DS2417 The DS2417 1-Wire Time Chip with Interrupt offers a simple solution for storing and retrieving vital time information with minimal hardware. The DS2417 contains a unique lasered ROM and a...
Extremely Accurate I²C-Integrated RTC/TCXO/Crystal -- 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...
±5ppm, I 2C Real-Time Clock -- DS3231M The DS3231M is a low-cost, extremely accurate, I2C real-time clock (RTC). The device incorporates a battery input and maintains accurate timekeeping when main power to the device is...
Extremely Accurate I²C RTC with Integrated Crystal and SRAM -- DS3232 The DS3232 is a low-cost temperature-compensated crystal oscillator (TCXO) with a very accurate, temperature-compensated, integrated real-time clock (RTC) and 236 bytes of battery-backed SRAM. Additionally, the DS3232 incorporates a battery...
±5ppm, I²C Real-Time Clock with SRAM -- DS3232M The DS3232M is a low-cost, extremely accurate, I²C real-time clock (RTC) with 236 bytes of battery-backed SRAM. The device incorporates a battery input and maintains accurate timekeeping when main power...
Extremely Accurate SPI Bus RTC with Integrated Crystal and SRAM -- DS3234 The DS3234 is a low-cost, extremely accurate SPI™ bus real-time clock (RTC) with an integrated temperature-compensated crystal oscillator (TCXO) and crystal. The DS3234 incorporates a precision, temperature-compensated voltage reference and...
Advanced NV SRAM Battery Cap -- DS3800 The DS3800 is a secondary lithium power source designed to conveniently snap-on over a 40mm Ball Grid Array (BGA) nonvolatile memory module. Its durable attachment flanges prevent misalignment and maintain...
PowerCap with Crystal -- DS9034I-PCX
PowerCap with Crystal -- DS9034PCX
The DS9034PCX PowerCap is designed to be a lithium power source for nonvolatile timekeeping RAMs in Dallas Semiconductor's directly surface-mountable PowerCap Module (PCM) package. After a PowerCap module board has...
Low-Voltage SPI/3-Wire RTCs with Trickle Charger -- DS1390
Low-Voltage SPI/3-Wire RTCs with Trickle Charger -- DS1391
Low-Voltage SPI/3-Wire RTCs with Trickle Charger -- DS1392
Low-Voltage SPI/3-Wire RTCs with Trickle Charger -- DS1393
Low-Voltage SPI/3-Wire RTCs with Trickle Charger -- DS1394
The low-voltage serial-peripheral interface (SPI™) DS1390/DS1391/DS1394 and the low-voltage 3-wire DS1392/DS1393 real-time clocks (RTCs) are clocks/calendars that provide hundredths of a second, seconds, minutes, hours, day, date, month, and year...
Spread-Spectrum Crystal Multiplier -- MAX31180 The MAX31180 is a low-jitter, crystal-based clock generator with an integrated phase-locked loop (PLL) to generate spread-spectrum clock outputs from 16MHz to 134MHz. The device is pin-programmable to select the...
Spread-Spectrum Clock Generators -- MAX31C80
Spread-Spectrum Clock Generators -- MAX31D80
The MAX31C80/MAX31D80 are spread-spectrum clock generators that contain a phase-locked loop (PLL) that generates a 2MHz to 134MHz clock from an input clock or crystal. The PLL can provide a...
Multiple Output Clock Generators with Dual PLLs and OTP -- MAX9471
Multiple Output Clock Generators with Dual PLLs and OTP -- MAX9472
The MAX9471/MAX9472 multipurpose clock generators are ideal for consumer and communication applications. The MAX9471/MAX9472 feature two buffered phase-locked loop (PLL) outputs that can be independently set from 4MHz to 200MHz.
System Energy Manager -- DS80CH11 The system energy manager is a highly integrated microcontroller that provides several key features for systems including key scanning and control, battery and power management, as well as two 2-Wire...
Watchdog Clock with NV RAM Control -- DS1558 Watchdog Clock with NV RAM Control