MCP79402 Series

Battery-Backed I2C Real-Time Clock/Calendar with Pre-Programmed EUI-64™ MAC ID

Catalog

Battery-Backed I2C Real-Time Clock/Calendar with Pre-Programmed EUI-64™ MAC ID

Part	Current - Timekeeping (Max)	Features	Type	Package Name	Time Format	Package Width	Package Length	Mounting Type	Date Format	Voltage - Supply (Maximum)	Voltage - Supply (Minimum)	Voltage - Supply, Battery (Maximum)	Voltage - Supply, Battery (Minimum)	Operating Temperature (Min)	Operating Temperature (Max)	Memory Size	Interface	Package / Case
Microchip Technology MCP79402-I/MS	1.2 µA	Alarm Leap Year Square Wave Output SRAM Unique ID	Clock/Calendar	8-MSOP 8-TSSOP 8-MSOP	HH:MM:SS (12/24 hr)	3 mm	0.118 in	Surface Mount	YY-MM-DD-dd	5.5 V	1.8 V	5.5 V	1.3 V	-40 °C	85 °C	64 B	2-Wire Serial I2C
Microchip Technology MCP79402T-I/MNY	1.2 µA	Alarm Leap Year Square Wave Output SRAM Unique ID	Clock/Calendar	8-TDFN	HH:MM:SS (12/24 hr)	3 mm	2 mm	Surface Mount	YY-MM-DD-dd	5.5 V	1.8 V	5.5 V	1.3 V	-40 °C	85 °C	64 B	2-Wire Serial I2C	8-WFDFN Exposed Pad
Microchip Technology MCP79402T-I/MS	1.2 µA	Alarm Leap Year Square Wave Output SRAM Unique ID	Clock/Calendar	8-MSOP 8-TSSOP 8-MSOP	HH:MM:SS (12/24 hr)	3 mm	0.118 in	Surface Mount	YY-MM-DD-dd	5.5 V	1.8 V	5.5 V	1.3 V	-40 °C	85 °C	64 B	2-Wire Serial I2C
Microchip Technology MCP79402T-I/ST	1.2 µA	Alarm Leap Year Square Wave Output SRAM Unique ID	Clock/Calendar	8-TSSOP	HH:MM:SS (12/24 hr)	4.4 mm	0.173 in	Surface Mount	YY-MM-DD-dd	5.5 V	1.8 V	5.5 V	1.3 V	-40 °C	85 °C	64 B	2-Wire Serial I2C
Microchip Technology MCP79402-I/ST	1.2 µA	Alarm Leap Year Square Wave Output SRAM Unique ID	Clock/Calendar	8-TSSOP	HH:MM:SS (12/24 hr)	4.4 mm	0.173 in	Surface Mount	YY-MM-DD-dd	5.5 V	1.8 V	5.5 V	1.3 V	-40 °C	85 °C	64 B	2-Wire Serial I2C
Microchip Technology MCP79402T-I/SN	1.2 µA	Alarm Leap Year Square Wave Output SRAM Unique ID	Clock/Calendar	8-SOIC	HH:MM:SS (12/24 hr)	3.9 mm	0.154 in	Surface Mount	YY-MM-DD-dd	5.5 V	1.8 V	5.5 V	1.3 V	-40 °C	85 °C	64 B	2-Wire Serial I2C
Microchip Technology MCP79402-I/SN	1.2 µA	Alarm Leap Year Square Wave Output SRAM Unique ID	Clock/Calendar	8-SOIC	HH:MM:SS (12/24 hr)	3.9 mm	0.154 in	Surface Mount	YY-MM-DD-dd	5.5 V	1.8 V	5.5 V	1.3 V	-40 °C	85 °C	64 B	2-Wire Serial I2C

Catalog

Battery-Backed I2C Real-Time Clock/Calendar with Pre-Programmed EUI-64™ MAC ID

Description

The MCP79402 general purpose I2CTM Compatible real-time clock/calendar (RTCC) is highly integrated with memory and advanced features normally found in higher priced devices. These features include a battery switchover circuit for backup power, a timestamp to log power failures and digital trimming for accuracy. Using a low-cost 32,768 kHz crystal or other clock source, time is tracked in either a 12-hour or 24-hour format with an AM/PM indicator and timing to the second, minute, hour, day of the week, day, month and year. As an interrupt or wakeup signal, a multifunction open drain output can be programmed as an Alarm Out or as a Clock Out that supports 4 selectable frequencies. In addition to the SRAM memory, there a unique ID that is factory programmed in a locked section of EEPROM with a MAC Address. This ID can also be unlocked and reprogrammed by the end user.