MCP79411 Series

Battery-Backed I2C Real-Time Clock/Calendar with Pre-Programmed EUI-48™ MAC ID

Catalog

Battery-Backed I2C Real-Time Clock/Calendar with Pre-Programmed EUI-48™ MAC ID

Part	Current - Timekeeping (Max)	Interface	Operating Temperature [Max]	Operating Temperature [Min]	Voltage - Supply, Battery [Min]	Voltage - Supply, Battery [Max]	Supplier Device Package	Type	Package / Case	Package / Case [custom]	Package / Case [custom]	Voltage - Supply [Min]	Voltage - Supply [Max]	Mounting Type	Memory Size	Time Format	Features	Package / Case [y]	Package / Case [x]	Package / Case
Microchip Technology MCP79411-I/ST	1.2 µA	2-Wire Serial I2C	85 °C	-40 °C	1.3 V	5.5 V	8-TSSOP	Clock/Calendar	8-TSSOP	0.173 "	4.4 mm	1.8 V	5.5 V	Surface Mount	1 Mpts 64 B	HH:MM:SS (12/24 hr)	Alarm Leap Year Square Wave Output SRAM Unique ID
Microchip Technology MCP79411T-I/SN	1.2 µA	2-Wire Serial I2C	85 °C	-40 °C	1.3 V	5.5 V	8-SOIC	Clock/Calendar	8-SOIC			1.8 V	5.5 V	Surface Mount	1 Mpts 64 B	HH:MM:SS (12/24 hr)	Alarm Leap Year Square Wave Output SRAM Unique ID	3.9 mm	0.154 in
Microchip Technology MCP79411-I/MS	1.2 µA	2-Wire Serial I2C	85 °C	-40 °C	1.3 V	5.5 V	8-MSOP	Clock/Calendar	8-MSOP 8-TSSOP	0.118 in		1.8 V	5.5 V	Surface Mount	1 Mpts 64 B	HH:MM:SS (12/24 hr)	Alarm Leap Year Square Wave Output SRAM Unique ID			3 mm
Microchip Technology MCP79411T-I/ST	1.2 µA	2-Wire Serial I2C	85 °C	-40 °C	1.3 V	5.5 V	8-TSSOP	Clock/Calendar	8-TSSOP	0.173 "	4.4 mm	1.8 V	5.5 V	Surface Mount	1 Mpts 64 B	HH:MM:SS (12/24 hr)	Alarm Leap Year Square Wave Output SRAM Unique ID

Catalog

Battery-Backed I2C Real-Time Clock/Calendar with Pre-Programmed EUI-48™ MAC ID

Key Features

• * Hours, Minutes, Seconds, Day of Week, Day, Month, Year

• * Leap year compensated to 2399

• * 12/24 hour modes

• * 1 PPM Resolution

• * ±129 PPM Range

• * Dual Programmable Alarms

• * Clock output with selectable frequency

• * Alarm output

• * General Purpose output

• * Time logged on switchover to and from Battery Backup

• * I2C Clock Frequency up to 400 kHz

• * 64 Bytes Battery-Backed SRAM

• * 1Kb EEPROM Memory

• * Robust write unlock sequence

• * Preprogrammed EUI-48™ MAC Address

• * Operating Voltage 1.8V to 5.5V

• * Backup Voltage 1.3V to 5.5V

• * Low Typical Timekeeping Current

• * Automatic Switchover to Battery Backup

Description

The MCP79411 general purpose I2C™Compatible real-time clock/calendar (RTCC) is highly integrated with nonvolatile 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, non-volatile memory is included along with a Unique ID in a locked section of EEPROM that is factory programmed with an EUI-48 MAC Address.