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Timing Circuits - Real Time Clocks - RTC with Embedded Unique IDClick the column header   to sort descending/ascending.
Device


Data-
Sheet


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Device Description


VCC (V)


VBAT (V)


IBAT (nA)


Accuracy (ppm)


Alarms


Crystal Frequency Trimming


Selectable Frequency Output


CPU Supervisory Function POR


CPU Supervisory Function Watchdog Timer


Battery Seal


Battery Backup


VTRIP for POR


IRQ_bar


FOUT


RESET_bar


Oscillator Compensation (ppm)


SRAM


Other Functions


1K Units MSRP ($)


Package


ISL12024  Real-Time Clock/Calendar with Embedded Unique ID2.7 to 5.51.8 to 5.5850*2Y3NNYY*IRQ_bar/FOUTIRQ_bar/FOUTN-336 to +337512x8-Bit EEPROM- 64-bit Unique ID1.738 Ld SOIC
8 Ld SOIC T+R
8 Ld TSSOP
8 Ld TSSOP T+R 
ISL12024IRTC  Real-Time Clock/Calendar with Embedded Unique ID2.7 to 5.51.8 to 5.5850*2Y3NNYY*IRQ_bar/FOUTIRQ_bar/FOUTN-64 to +110512x8-Bit EEPROM- 64-bit Unique ID1.838 Ld TDFN
8 Ld TDFN T+R 
ISL12025  Real-Time Clock/Calendar with I2C Bus™ and EEPROM2.7 to 5.51.8 to 5.5850*2Y*YYYY5 Select VTRIP Levels**Y-336 to +337512x8-Bit EEPROM- 64-bit Unique ID
- CPU Supervisor
1.918 Ld SOIC
8 Ld SOIC T+R
8 Ld TSSOP
8 Ld TSSOP T+R 

Timing Circuits - Real Time Clocks - RTC with Integrated EEPROM and CPU Supervisory FunctionsClick the column header   to sort descending/ascending.
Device


Data-
Sheet


iBuy


iSim


Device Description


VCC (V)


VBAT (V)


IBAT (nA)


Accuracy (ppm)


Alarms


Crystal Frequency Trimming


Selectable Frequency Output


CPU Supervisory Function POR


CPU Supervisory Function Watchdog Timer


Battery Seal


Battery Backup


VTRIP for POR


IRQ_bar


FOUT


RESET_bar


Oscillator Compensation (ppm)


SRAM


Other Functions


1K Units MSRP ($)


Package


ISL12026  Real Time Clock/Calendar with I2C Bus™ and EEPROM2.7 to 5.51.8 to 5.5850*2Y3NNYY*IRQ_bar/FOUTIRQ_bar/FOUTN-64 to +110512x8-Bit EEPROM*1.408 Ld SOIC
8 Ld SOIC T+R
8 Ld TSSOP
8 Ld TSSOP T+R 
ISL12026A  Real Time Clock/Calendar with I2C Bus™ and EEPROM2.7 to 5.51.8 to 5.5850*2Y3NNYY*IRQ_bar/FOUTIRQ_bar/FOUTN-64 to +110512x8-Bit EEPROM*1.338 Ld SOIC
8 Ld SOIC T+R
8 Ld TSSOP
8 Ld TSSOP T+R 
ISL12027  Real Time Clock/Calendar with EEPROM2.7 to 5.51.8 to 5.5850*2Y*YYYY5 Select VTRIP Levels from 2.63V to 4.64V**Y-64 to +110512x8-Bit EEPROM*1.658 Ld SOIC
8 Ld SOIC T+R
8 Ld TSSOP
8 Ld TSSOP T+R 
ISL12027A  Real Time Clock/Calendar with EEPROM2.7 to 5.51.8 to 5.5850*2Y*YYYY5 Select VTRIP Levels from 2.63V to 4.64V**Y-64 to +110512x8-Bit EEPROM*1.658 Ld SOIC
8 Ld SOIC T+R
8 Ld TSSOP
8 Ld TSSOP T+R 
ISL12028  Real Time Clock/Calendar with I2C Bus™ and EEPROM2.7 to 5.51.8 to 5.5850*2Y3YYYY5 Select VTRIP Levels from 2.63V to 4.64VIRQ_bar/FOUTIRQ_bar/FOUTY-64 to +110512x8-Bit EEPROM*1.8014 Ld SOIC
14 Ld SOIC T+R
14 Ld TSSOP
14 Ld TSSOP T+R 
ISL12028A  Real Time Clock/Calendar with I2C Bus™ and EEPROM2.7 to 5.51.8 to 5.5850*2Y3YYYY5 Select VTRIP Levels from 2.63V to 4.64VIRQ_bar/FOUTIRQ_bar/FOUTY-64 to +110512x8-Bit EEPROM*1.8014 Ld SOIC
14 Ld SOIC T+R
14 Ld TSSOP
14 Ld TSSOP T+R 
ISL12029  Real Time Clock/Calendar with I2C Bus™ and EEPROM2.7 to 5.51.8 to 5.5850*2Y3YYYY5 Select VTRIP Levels from 2.63V to 4.64VIRQ_bar/FOUTIRQ_bar/FOUTY-64 to +110512x8-Bit EEPROM*1.8014 Ld SOIC
14 Ld SOIC T+R
14 Ld TSSOP
14 Ld TSSOP T+R 
ISL12029A  Real Time Clock/Calendar with I2C Bus™ and EEPROM2.7 to 5.51.8 to 5.5850*2Y3YYYY5 Select VTRIP Levels from 2.63V to 4.64VIRQ_bar/FOUTIRQ_bar/FOUTY-64 to +110512x8-Bit EEPROM*1.8014 Ld SOIC
14 Ld SOIC T+R
14 Ld TSSOP
14 Ld TSSOP T+R 

Timing Circuits - Real Time Clocks - Feature-Rich RTC with 50/60 Cycle AC InputClick the column header   to sort descending/ascending.
Device


Data-
Sheet


iBuy


iSim


Device Description


VCC (V)


VBAT (V)


IBAT (nA)


Accuracy (ppm)


Alarms


Crystal Frequency Trimming


Selectable Frequency Output


CPU Supervisory Function POR


CPU Supervisory Function Watchdog Timer


Battery Seal


Battery Backup


VTRIP for POR


IRQ_bar


FOUT


RESET_bar


Oscillator Compensation (ppm)


SRAM


Other Functions


1K Units MSRP ($)


Package


ISL12030  Low Power RTC with 50/60 Cycle AC Input, Alarms and Daylight Savings Correction2.7 to 5.5***2N*NNY**IRQ_bar*N*128 Bytes- Daylight Savings1.098 Ld SOIC
8 Ld SOIC T+R 
ISL12032  Low Power RTC with Battery Backed SRAM and 50/60 Cycle AC Input and Xtal Back-up2.7 to 5.51.8 to 5.5800*2Y7NNYY*IRQ_barFOUTN-60 to +60128 Bytes- Trickle Charger
- Crystal Backup
- Daylight Savings
1.3514 Ld TSSOP
14 Ld TSSOP T+R 

Timing Circuits - Real Time Clocks - Low Power RTC with Battery BackupClick the column header   to sort descending/ascending.
Device


Data-
Sheet


iBuy


iSim


Device Description


VCC (V)


VBAT (V)


IBAT (nA)


Accuracy (ppm)


Alarms


Crystal Frequency Trimming


Selectable Frequency Output


CPU Supervisory Function POR


CPU Supervisory Function Watchdog Timer


Battery Seal


Battery Backup


VTRIP for POR


IRQ_bar


FOUT


RESET_bar


Oscillator Compensation (ppm)


SRAM


Other Functions


1K Units MSRP ($)


Package


ISL12008  I2C Real Time Clock with Battery Backup Low Power RTC with Battery ReSeal™ Function2.7 to 5.51.8 to 5.5800*1Y1NNYY**FOUTN-94 to +140**1.068 Ld SOIC
8 Ld SOIC T+R 

Timing Circuits - Real Time Clocks - Low Power RTC with Battery Backed SRAMClick the column header   to sort descending/ascending.
Device


Data-
Sheet


iBuy


iSim


Device Description


VCC (V)


VBAT (V)


IBAT (nA)


Accuracy (ppm)


Alarms


Crystal Frequency Trimming


Selectable Frequency Output


CPU Supervisory Function POR


CPU Supervisory Function Watchdog Timer


Battery Seal


Battery Backup


VTRIP for POR


IRQ_bar


FOUT


RESET_bar


Oscillator Compensation (ppm)


SRAM


Other Functions


1K Units MSRP ($)


Package


ISL1208  I2C® Real Time Clock/Calendar, Low Power RTC with Battery Backed SRAM2.7 to 5.51.8 to 5.5400*1Y15NNYYYIRQ_bar/FOUTIRQ_bar/FOUTN-94 to +1402 Bytes*0.968 Ld MSOP
8 Ld MSOP T+R
8 Ld SOIC
8 Ld SOIC T+R
8 Ld TDFN
8 Ld TDFN T+R
Eval Board 
ISL1218  Low Power RTC with Battery Backed SRAM2.7 to 5.51.8 to 5.5400    1Y15NNYYYIRQ_bar/FOUTIRQ_bar/FOUTN-94 to +1408 Bytes    1.278 Ld MSOP
8 Ld MSOP T+R
8 Ld SOIC
8 Ld SOIC T+R 
ISL1220  Low Power RTC with 8 Bytes of Battery Backed SRAM and Separate FOUT2.7 to 5.51.8 to 5.5400    1Y15NNYYYIRQ_barFOUTN-94 to +1408 Bytes    1.1410 Ld MSOP
10 Ld MSOP T+R 

Timing Circuits - Real Time Clocks - Low Power RTC with Battery Backed SRAM and Event DetectionClick the column header   to sort descending/ascending.
Device


Data-
Sheet


iBuy


iSim


Device Description


VCC (V)


VBAT (V)


IBAT (nA)


Accuracy (ppm)


Alarms


Crystal Frequency Trimming


Selectable Frequency Output


CPU Supervisory Function POR


CPU Supervisory Function Watchdog Timer


Battery Seal


Battery Backup


VTRIP for POR


IRQ_bar


FOUT


RESET_bar


Oscillator Compensation (ppm)


SRAM


Other Functions


1K Units MSRP ($)


Package


ISL1209  Low Power RTC with Battery Backed SRAM and Event Detection2.7 to 5.51.8 to 5.5400    1Y15NNYYYIRQ_bar/FOUTIRQ_bar/FOUTN-94 to +1402 Bytes - Event Detect1.2910 Ld MSOP
10 Ld MSOP T+R
10 Ld MSOP T+R
Eval Board 
ISL1219  Low Power RTC with Battery Backed SRAM and Event Detection2.7 to 5.51.8 to 5.5400*1Y15NNYY*IRQ_bar/FOUTIRQ_bar/FOUTN-94 to +1402 Bytes- Event Detect
- Time Stamp
1.3210 Ld MSOP
10 Ld MSOP T+R 
ISL1221  Low Power RTC with Battery Backed SRAM and Event Detection2.7 to 5.51.8 to 5.5400*1Y15NNYY*IRQ_bar/EVDET_barFOUTN-94 to +1402 Bytes- Event Detect
- Time Stamp
1.4010 Ld MSOP
10 Ld MSOP T+R 

Timing Circuits - Real Time Clocks - Low Power RTC with IRQs, Alarm and TimerClick the column header   to sort descending/ascending.
Device


Data-
Sheet


iBuy


iSim


Device Description


VCC (V)


VBAT (V)


IBAT (nA)


Accuracy (ppm)


Alarms


Crystal Frequency Trimming


Selectable Frequency Output


CPU Supervisory Function POR


CPU Supervisory Function Watchdog Timer


Battery Seal


Battery Backup


VTRIP for POR


IRQ_bar


FOUT


RESET_bar


Oscillator Compensation (ppm)


SRAM


Other Functions


1K Units MSRP ($)


Package


ISL12082  I2C-Bus™ Real Time Clock with Two Interrupts, Alarm, and Timer Low Power RTC with Battery ReSeal™, 2 IRQs, Hundredths of a Second Time, and Crystal Compensation2.7 to 5.51.8 to 5.5800    1Y4NNYYYIRQ1/fOUT, IRQ2IRQ_bar/FOUTN-94 to +140N- Alarm
- Timer
1.158 Ld SOIC
8 Ld SOIC T+R
10 Ld MSOP
10 Ld MSOP T+R 

Timing Circuits - Real Time Clocks - Low Power, Low Cost RTC, No Battery BackupClick the column header   to sort descending/ascending.
Device


Data-
Sheet


iBuy


iSim


Device Description


VCC (V)


VBAT (V)


IBAT (nA)


Accuracy (ppm)


Alarms


Crystal Frequency Trimming


Selectable Frequency Output


CPU Supervisory Function POR


CPU Supervisory Function Watchdog Timer


Battery Seal


Battery Backup


VTRIP for POR


IRQ_bar


FOUT


RESET_bar


Oscillator Compensation (ppm)


SRAM


Other Functions


1K Units MSRP ($)


Package


ISL12057  Low Cost and Low Power I2C RTC Real Time Clock/Calendar Low Power and Low Cost RTC with Alarm Function and Dual IRQ pins1.4 to 3.6N/AN/A    2    4Y    N/AN/A    IRQ1/fOUT, IRQ2IRQ1/fOUT            Dual Alarms, Dual IRQs0.928 Ld MSOP
8 Ld MSOP T+R
8 Ld SOIC
8 Ld SOIC T+R
8 Ld uTDFN T+R 
ISL12058  Low Cost and Low Power I2C-Bus™ Real Time Clock/Calendar Low Power and Low Cost RTC with Alarm Function1.4 to 3.6N/AN/A    2    4Y    N/AN/A    IRQ1/fOUTIRQ_bar/fOUT            Dual Alarms0.928 Ld MSOP
8 Ld MSOP T+R
8 Ld SOIC
8 Ld SOIC T+R
8 Ld TDFN
8 Ld TDFN T+R
8 Ld uTDFN T+R 
ISL12059  Low Cost and Low Power I2C Bus™ Real Time Clock/Calendar Low Power and Low Cost RTC1.4 to 3.6N/AN/A    0    1Y    N/AN/A    N/A512Hz            Digital Out0.928 Ld SOIC
8 Ld SOIC T+R 

Timing Circuits - Real Time Clocks - High Precision RTC Module with Embedded Crystal and Temperature CompensationClick the column header   to sort descending/ascending.
Device


Data-
Sheet


iBuy


iSim


Device Description


VCC (V)


VBAT (V)


IBAT (nA)


Accuracy (ppm)


Alarms


Crystal Frequency Trimming


Selectable Frequency Output


CPU Supervisory Function POR


CPU Supervisory Function Watchdog Timer


Battery Seal


Battery Backup


VTRIP for POR


IRQ_bar


FOUT


RESET_bar


Oscillator Compensation (ppm)


SRAM


Other Functions


1K Units MSRP ($)


Package


ISL12020M  Real Time Clock with Embedded Crystal, ±5ppm Accuracy2.7 to 5.51.8 to 5.5100051Y15NNYY6 Select VTRIP LevelsIRQ_bar/FOUTIRQ_bar/FOUTN-336 to +337128 Bytes- Battery Switchover Time Stamp
- Battery Status Monitor
- Brown-out Alarm
- Daylight Savings
2.7920 Ld DFN
20 Ld DFN T+R
Eval Board 
ISL12022M  Low Power RTC with Battery Backed SRAM, Integrated ±5ppm Temperature Compensation and Auto Daylight Saving2.7 to 5.51.8 to 5.5100051Y15NNYY6 Select VTRIP LevelsIRQ_bar/FOUTIRQ_bar/FOUTN-336 to +337128 Bytes- Battery Switchover Time Stamp
- Battery Status Monitor
- Brown-out Alarm
- Daylight Savings
2.5920 Ld SOIC
20 Ld SOIC T+R 
ISL12022MA  Low Power RTC with Battery Backed SRAM, Integrated ±5ppm Temperature Compensation and Auto Daylight Saving2.7 to 5.51.8 to 5.5100051Y15NNYY6 Select VTRIP LevelsIRQ_bar/FOUTIRQ_bar/FOUTN-336 to +337128 Bytes- Battery Switchover Time Stamp
- Battery Status Monitor
- Brown-out Alarm
- Daylight Savings
2.7320 Ld SOIC
20 Ld SOIC T+R 
ISL12022MR5421  Low Power RTC with Battery Backed SRAM, Integrated ±5ppm Temperature Compensation and Auto Daylight Saving2.7 to 5.51.8 to 5.5100051Y15NNYY6 Select VTRIP LevelsIRQ_bar/FOUTIRQ_bar/FOUTN-336 to +337128 Bytes- Battery Switchover Time Stamp
- Battery Status Monitor
- Brown-out Alarm
- Daylight Savings
2.5920 Ld SOIC
20 Ld SOIC T+R 

Timing Circuits - Real Time Clocks - High Precision RTC with On-Chip Temperature SensorClick the column header   to sort descending/ascending.
Device


Data-
Sheet


iBuy


iSim


Device Description


VCC (V)


VBAT (V)


IBAT (nA)


Accuracy (ppm)


Alarms


Crystal Frequency Trimming


Selectable Frequency Output


CPU Supervisory Function POR


CPU Supervisory Function Watchdog Timer


Battery Seal


Battery Backup


VTRIP for POR


IRQ_bar


FOUT


RESET_bar


Oscillator Compensation (ppm)


SRAM


Other Functions


1K Units MSRP ($)


Package


ISL12022  Low Power RTC with Battery-Backed SRAM and Embedded Temp Compensation ±5ppm with Auto Day Light Saving2.7 to 5.51.8 to 5.5100051Y15NNYY6 Select VTRIP LevelsIRQ_bar/FOUTIRQ_bar/FOUTN-336 to +337128 Bytes- Battery Switchover Time Stamp
- Battery Status Monitor
- Brown-out Alarm
- Daylight Savings
1.798 Ld SOIC
8 Ld SOIC T+R 
ISL12023  Low Power RTC with Battery-Backed SRAM and Embedded Temp Compensation ±5ppm with Auto Day Light Saving2.7 to 5.51.8 to 5.5100051Y15NNYY6 Select VTRIP LevelsIRQ_barFOUTN-336 to +337128 Bytes- Battery Switchover Time Stamp
- Battery Status Monitor
- Brown-out Alarm
- Daylight Savings
1.9314 Ld TSSOP
14 Ld TSSOP T+R 
*Data listed above is for reference only, please refer to Product Data Sheets for current specifications.