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Real Time Clocks

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Photo Mfr. Part # Availability Price Quantity Datasheet Series Package/Case Packaging Product Status Programmable Type Features Memory Size Time Format Date Format Interface Voltage - Supply Voltage - Supply, Battery Current - Timekeeping (Max) Operating Temperature Mounting Type Grade Qualification Supplier Device Package
RX-8035SA:B3 PURE SN EPSON

RX-8035SA:B3 PURE SN

IC RTC TIME EVENT REC I2C 14SOP

EPSON

1,000 -
Datasheet RX-8035SA 14-SOIC (0.197", 5.00mm Width) Tape & Reel (TR) Active Not Verified Time Event Recorder Alarm - HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 2.4V ~ 5.5V 1V ~ 5.5V 2.5µA @ 3V -40°C ~ 85°C Surface Mount - - 14-SOP
DS1306E+T&R Analog Devices Inc./Maxim Integrated

DS1306E+T&R

IC RTC CLK/CALENDAR SPI 20TSSOP

Analog Devices Inc./Maxim Integrated

6,266 -
Datasheet - 20-TSSOP (0.173", 4.40mm Width) Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year, NVSRAM, Square Wave Output, Trickle-Charger 96B HH:MM:SS (12/24 hr) YY-MM-DD-dd SPI 2V ~ 5.5V 2V ~ 5.5V 25.3µA ~ 81µA @ 2V ~ 5V 0°C ~ 70°C Surface Mount - - 20-TSSOP
AB-RTCMC-32.768KHZ-EOZ9-S3-DBT Abracon LLC

AB-RTCMC-32.768KHZ-EOZ9-S3-DBT

IC RTC CLK/CALENDAR I2C MODULE

Abracon LLC

1,969 -
Datasheet - 10-SMD Module Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, EEPROM, Leap Year, Square Wave Output, SRAM, TCXO/Crystal, Trickle-Charger 8B HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1.4V ~ 5.5V 1.4V ~ 5.5V 1.5µA ~ 2.2µA @ 1.4V ~ 5V -40°C ~ 85°C Surface Mount - - Module
DS1388Z-33+T&R Analog Devices Inc./Maxim Integrated

DS1388Z-33+T&R

IC RTC CLK/CALENDAR I2C 8SOIC

Analog Devices Inc./Maxim Integrated

4,270 -
Datasheet - 8-SOIC (0.154", 3.90mm Width) Tape & Reel (TR) Active Not Verified Clock/Calendar EEPROM, Leap Year, Supervisor, Trickle-Charger, Watchdog Timer 512B HH:MM:SS:hh (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 2.97V ~ 3.63V 1.3V ~ 5.5V 150µA @ 2.97V ~ 3.63V -40°C ~ 85°C Surface Mount - - 8-SOIC
DS1388Z-5+ Analog Devices Inc./Maxim Integrated

DS1388Z-5+

IC RTC CLK/CALENDAR I2C 8SOIC

Analog Devices Inc./Maxim Integrated

740 -
Datasheet - 8-SOIC (0.154", 3.90mm Width) Tube Active Not Verified Clock/Calendar EEPROM, Leap Year, Supervisor, Trickle-Charger, Watchdog Timer 512B HH:MM:SS:hh (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 4.5V ~ 5.5V 1.3V ~ 5.5V 270µA @ 4.5V ~ 5.5V -40°C ~ 85°C Surface Mount - - 8-SOIC
DS1682S+T&R Analog Devices Inc./Maxim Integrated

DS1682S+T&R

IC RTC ELAPSED CNT I2C 8SOIC

Analog Devices Inc./Maxim Integrated

5,579 -
Datasheet - 8-SOIC (0.154", 3.90mm Width) Tape & Reel (TR) Active Verified Elapsed Time Counter Alarm, EEPROM 10B Binary Binary I2C, 2-Wire Serial 2.5V ~ 5.5V - 4µA ~ 15µA @ 3V ~ 5.5V -40°C ~ 85°C Surface Mount - - 8-SOIC
ISL12020MIRZ Renesas Electronics Corporation

ISL12020MIRZ

IC RTC CLK/CALENDAR I2C 20DFN

Renesas Electronics Corporation

498 -
Datasheet - 20-PowerLFDFN Tube Active Not Verified Clock/Calendar Alarm, Daylight Savings, Leap Year, SRAM 128B HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 2.7V ~ 5.5V 1.8V ~ 5.5V 14µA ~ 15µA @ 3V ~ 5V -40°C ~ 85°C Surface Mount - - 20-DFN (5.5x4)
DS1388Z-33+ Analog Devices Inc./Maxim Integrated

DS1388Z-33+

IC RTC CLK/CALENDAR I2C 8SOIC

Analog Devices Inc./Maxim Integrated

2,198 -
Datasheet - 8-SOIC (0.154", 3.90mm Width) Tube Active Not Verified Clock/Calendar EEPROM, Leap Year, Supervisor, Trickle-Charger, Watchdog Timer 512B HH:MM:SS:hh (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 2.97V ~ 3.63V 1.3V ~ 5.5V 150µA @ 2.97V ~ 3.63V -40°C ~ 85°C Surface Mount - - 8-SOIC
DS1305E+T&R Analog Devices Inc./Maxim Integrated

DS1305E+T&R

IC RTC CLK/CALENDAR SPI 20TSSOP

Analog Devices Inc./Maxim Integrated

7,616 -
Datasheet - 20-TSSOP (0.173", 4.40mm Width) Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year, NVSRAM, Trickle-Charger 96B HH:MM:SS (12/24 hr) YY-MM-DD-dd SPI 2V ~ 5.5V 2V ~ 5.5V 25.3µA ~ 81µA @ 2V ~ 5V 0°C ~ 70°C Surface Mount - - 20-TSSOP
DS1306EN+T&R Analog Devices Inc./Maxim Integrated

DS1306EN+T&R

IC RTC CLK/CALENDAR SPI 20TSSOP

Analog Devices Inc./Maxim Integrated

5,549 -
Datasheet - 20-TSSOP (0.173", 4.40mm Width) Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year, NVSRAM, Square Wave Output, Trickle-Charger 96B HH:MM:SS (12/24 hr) YY-MM-DD-dd SPI 2V ~ 5.5V 2V ~ 5.5V 25.3µA ~ 81µA @ 2V ~ 5V -40°C ~ 85°C Surface Mount - - 20-TSSOP
M41ST87WMX6TR STMicroelectronics

M41ST87WMX6TR

IC RTC CLOCK/CALENDAR I2C 28SO

STMicroelectronics

4,044 -
Datasheet - 28-SOIC (0.295", 7.50mm Width) Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year, NVSRAM, Square Wave Output, Supervisor, Watchdog Timer 128B HH:MM:SS:hh (24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 2.7V ~ 3.6V 2.5V ~ 3.6V 0.5mA @ 2.7V ~ 3.6V -40°C ~ 85°C Surface Mount - - 28-SO
DS1305EN+T&R Analog Devices Inc./Maxim Integrated

DS1305EN+T&R

IC RTC CLK/CALENDAR SPI 20TSSOP

Analog Devices Inc./Maxim Integrated

5,805 -
Datasheet - 20-TSSOP (0.173", 4.40mm Width) Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year, NVSRAM, Trickle-Charger 96B HH:MM:SS (12/24 hr) YY-MM-DD-dd SPI 2V ~ 5.5V 2V ~ 5.5V 25.3µA ~ 81µA @ 2V ~ 5V -40°C ~ 85°C Surface Mount - - 20-TSSOP
DS1682S+ Analog Devices Inc./Maxim Integrated

DS1682S+

IC RTC ELAPSED CNT I2C 8SOIC

Analog Devices Inc./Maxim Integrated

2,295 -
Datasheet - 8-SOIC (0.154", 3.90mm Width) Tube Active Verified Elapsed Time Counter Alarm, EEPROM 10B Binary Binary I2C, 2-Wire Serial 2.5V ~ 5.5V - 4µA ~ 15µA @ 3V ~ 5.5V -40°C ~ 85°C Surface Mount - - 8-SOIC
DS1305E+ Analog Devices Inc./Maxim Integrated

DS1305E+

IC RTC CLK/CALENDAR SPI 20TSSOP

Analog Devices Inc./Maxim Integrated

1,702 -
Datasheet - 20-TSSOP (0.173", 4.40mm Width) Tube Active Not Verified Clock/Calendar Alarm, Leap Year, NVSRAM, Trickle-Charger 96B HH:MM:SS (12/24 hr) YY-MM-DD-dd SPI 2V ~ 5.5V 2V ~ 5.5V 25.3µA ~ 81µA @ 2V ~ 5V 0°C ~ 70°C Surface Mount - - 20-TSSOP
DS1339C-33#T&R Analog Devices Inc./Maxim Integrated

DS1339C-33#T&R

IC RTC CLK/CALENDAR I2C 16SOIC

Analog Devices Inc./Maxim Integrated

3,109 -
Datasheet - 16-SOIC (0.295", 7.50mm Width) Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year, Square Wave Output, Trickle-Charger - HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 2.97V ~ 5.5V 1.3V ~ 3.7V 200µA @ 5.5V -40°C ~ 85°C Surface Mount - - 16-SOIC
DS1306EN+ Analog Devices Inc./Maxim Integrated

DS1306EN+

IC RTC CLK/CALENDAR SPI 20TSSOP

Analog Devices Inc./Maxim Integrated

938 -
Datasheet - 20-TSSOP (0.173", 4.40mm Width) Tube Active Not Verified Clock/Calendar Alarm, Leap Year, NVSRAM, Square Wave Output, Trickle-Charger 96B HH:MM:SS (12/24 hr) YY-MM-DD-dd SPI 2V ~ 5.5V 2V ~ 5.5V 25.3µA ~ 81µA @ 2V ~ 5V -40°C ~ 85°C Surface Mount - - 20-TSSOP
RX-8035LC:B3 PURE SN EPSON

RX-8035LC:B3 PURE SN

IC RTC EVENT REC I2C 12VSOJ

EPSON

892 -
Datasheet RX-8035LC 12-TFSOJ (0.094", 2.40mm Width) Tape & Reel (TR) Active Not Verified Time Event Recorder Alarm - HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 2.4V ~ 5.5V 1V ~ 5.5V 2.5µA @ 3V -40°C ~ 85°C Surface Mount - - 12-VSOJ
DS1374C-33#T&R Analog Devices Inc./Maxim Integrated

DS1374C-33#T&R

IC RTC BINARY COUNTER I2C 16SOIC

Analog Devices Inc./Maxim Integrated

1,000 -
Datasheet - 16-SOIC (0.295", 7.50mm Width) Tape & Reel (TR) Active Not Verified Binary Counter Alarm, Square Wave Output, Trickle-Charger, Watchdog Timer - Binary Binary I2C, 2-Wire Serial 2.97V ~ 5.5V 1.3V ~ 5.5V 175µA @ 2.97V ~ 5.5V -40°C ~ 85°C Surface Mount - - 16-SOIC
DS1305+ Analog Devices Inc./Maxim Integrated

DS1305+

IC RTC CLK/CALENDAR SPI 16DIP

Analog Devices Inc./Maxim Integrated

965 -
Datasheet - 16-DIP (0.300", 7.62mm) Tube Active Not Verified Clock/Calendar Alarm, Leap Year, NVSRAM, Trickle-Charger 96B HH:MM:SS (12/24 hr) YY-MM-DD-dd SPI 2V ~ 5.5V 2V ~ 5.5V 25.3µA ~ 81µA @ 2V ~ 5V 0°C ~ 70°C Through Hole - - 16-PDIP
RX8900CE:UA3 EPSON

RX8900CE:UA3

IC RTC CLK/CALENDAR I2C 10SMD

EPSON

11,442 -
Datasheet RX8900CE 10-SMD, No Lead Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm - HH:MM:SS (24 hr) YY-MM-DD-dd I2C 2.5V ~ 5.5V 1.6V ~ 5.5V 1.4µA ~ 1.5µA @ 3V ~ 5V -40°C ~ 85°C Surface Mount - - 10-SMD
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Real Time Clocks FAQ

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Compare the manufacturer part number, electrical specifications, package, operating conditions and application requirements. The product datasheet should be used to confirm technical suitability.

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Yes. Send the exact part number, manufacturer and required quantity. Winsun (HK) Electronics can assist with availability checks, quotation support and sourcing options based on your requirement.

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Yes. Our sourcing team can review shortage and obsolete-part requirements and help check available supply channels or possible alternatives when appropriate.

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Submit an RFQ with the part number, manufacturer, quantity and target delivery requirement. Our sales team will review your request and follow up with current sourcing information.