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	Operating Temperature [Max]	Operating Temperature [Min]	Package / Case	Package / Case [custom]	Package / Case	Supplier Device Package	Current - Timekeeping (Max)	Mounting Type	Voltage - Supply [Min]	Voltage - Supply [Max]	Interface	Memory Size	Voltage - Supply, Battery [Min]	Voltage - Supply, Battery [Max]	Type	Time Format	Features	Package / Case [custom]	Package / Case [y]	Package / Case [x]
Microchip Technology MCP79402-I/MS	85 °C	-40 °C	8-MSOP 8-TSSOP	0.118 in	3 mm	8-MSOP	1.2 µA	Surface Mount	1.8 V	5.5 V	2-Wire Serial I2C	64 B	1.3 V	5.5 V	Clock/Calendar	HH:MM:SS (12/24 hr)	Alarm Leap Year Square Wave Output SRAM Unique ID
Microchip Technology MCP79402T-I/MS	85 °C	-40 °C	8-MSOP 8-TSSOP	0.118 in	3 mm	8-MSOP	1.2 µA	Surface Mount	1.8 V	5.5 V	2-Wire Serial I2C	64 B	1.3 V	5.5 V	Clock/Calendar	HH:MM:SS (12/24 hr)	Alarm Leap Year Square Wave Output SRAM Unique ID
Microchip Technology MCP79402T-I/ST	85 °C	-40 °C	8-TSSOP	0.173 "		8-TSSOP	1.2 µA	Surface Mount	1.8 V	5.5 V	2-Wire Serial I2C	64 B	1.3 V	5.5 V	Clock/Calendar	HH:MM:SS (12/24 hr)	Alarm Leap Year Square Wave Output SRAM Unique ID	4.4 mm
Microchip Technology MCP79402-I/ST	85 °C	-40 °C	8-TSSOP	0.173 "		8-TSSOP	1.2 µA	Surface Mount	1.8 V	5.5 V	2-Wire Serial I2C	64 B	1.3 V	5.5 V	Clock/Calendar	HH:MM:SS (12/24 hr)	Alarm Leap Year Square Wave Output SRAM Unique ID	4.4 mm
Microchip Technology MCP79402T-I/SN	85 °C	-40 °C	8-SOIC			8-SOIC	1.2 µA	Surface Mount	1.8 V	5.5 V	2-Wire Serial I2C	64 B	1.3 V	5.5 V	Clock/Calendar	HH:MM:SS (12/24 hr)	Alarm Leap Year Square Wave Output SRAM Unique ID		3.9 mm	0.154 in
Microchip Technology MCP79402-I/SN	85 °C	-40 °C	8-SOIC			8-SOIC	1.2 µA	Surface Mount	1.8 V	5.5 V	2-Wire Serial I2C	64 B	1.3 V	5.5 V	Clock/Calendar	HH:MM:SS (12/24 hr)	Alarm Leap Year Square Wave Output SRAM Unique ID		3.9 mm	0.154 in

Catalog

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

Key Features

• * VCC Min = 1.8V

• * Icc < 5 µA Typical Dynamic Current

• * VBAT Min = 1.3V

• * Ibat < 700nA Typical Timekeeping & SRAM Retention Current

• * VCC to VBAT (power lost)

• * VBAT to VCC (power restored)

• * Dual alarms with single Interrupt Output that operates on VCC or VBAT

• * Clock Out frequencies of 32.768, 8.192 & 4.096 KHz and 1 Hz

• * 1 ppm is approximately 86 milliseconds/day

• * Protect none, 1/4, 1/2 or all of array

• * Unique ID is factory programmed with MAC Address

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.