MCP79521 Series

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

Catalog

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

Part	Type	Date Format	Memory Size	Current - Timekeeping (Max)	Voltage - Supply, Battery (Maximum)	Voltage - Supply, Battery (Minimum)	Package Name	Interface	Mounting Type	Operating Temperature (Min)	Operating Temperature (Max)	Time Format	Voltage - Supply (Maximum)	Voltage - Supply (Minimum)	Package Length	Package Width	Features	Package / Case
Microchip Technology MCP79521-I/MS	Clock/Calendar	YY-MM-DD-dd	64 B	1 µA	3.6 V	1.3 V	10-MSOP 10-TFSOP	SPI	Surface Mount	-40 °C	85 °C	HH:MM:SS:hh (12/24 hr)	3.6 V	1.8 V	0.118 in	3 mm	Alarm EEPROM Leap Year Square Wave Output SRAM Unique ID
Microchip Technology MCP79521T-I/MS	Clock/Calendar	YY-MM-DD-dd	64 B	1 µA	3.6 V	1.3 V	10-MSOP 10-TFSOP	SPI	Surface Mount	-40 °C	85 °C	HH:MM:SS:hh (12/24 hr)	3.6 V	1.8 V	0.118 in	3 mm	Alarm EEPROM Leap Year Square Wave Output SRAM Unique ID
Microchip Technology MCP79521T-I/MN	Clock/Calendar	YY-MM-DD-dd	64 B	1 µA	3.6 V	1.3 V	10-TDFN	SPI	Surface Mount	-40 °C	85 °C	HH:MM:SS:hh (12/24 hr)	3.6 V	1.8 V	3 mm	3 mm	Alarm EEPROM Leap Year Square Wave Output SRAM Unique ID	10-WFDFN Exposed Pad

Catalog

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

Description

The MCP79521 SPI RTCC is highly integrated with memory and advanced features normally found in higher priced devices. By starting with a basic real-time clock, digital trimming was added for higher accuracy, a battery switchover for backup power, a timestamp to log power failures and three types of memory, which includes SRAM, EEPROM and a unique ID in a locked section of EEPROM. This ID is preprogrammed with a 48-bit MAC Address, but it can also be ordered blank for the end user to program.