MCP79512 Series

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

Catalog

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

Part	Operating Temperature [Max]	Operating Temperature [Min]	Current - Timekeeping (Max)	Voltage - Supply, Battery [Max]	Voltage - Supply, Battery [Min]	Time Format	Type	Interface	Supplier Device Package	Mounting Type	Package / Case	Package / Case [x]	Package / Case [x]	Voltage - Supply [Max]	Voltage - Supply [Min]	Memory Size	Features
Microchip Technology MCP79512-I/MS	85 °C	-40 °C	1 µA	3.6 V	1.3 V	HH:MM:SS:hh (12/24 hr)	Clock/Calendar	SPI	10-MSOP	Surface Mount	10-MSOP 10-TFSOP	3 mm	0.118 in	3.6 V	1.8 V	64 B	Alarm EEPROM Leap Year Square Wave Output SRAM Unique ID
Microchip Technology MCP79512T-I/MS	85 °C	-40 °C	1 µA	3.6 V	1.3 V	HH:MM:SS:hh (12/24 hr)	Clock/Calendar	SPI	10-MSOP	Surface Mount	10-MSOP 10-TFSOP	3 mm	0.118 in	3.6 V	1.8 V	64 B	Alarm EEPROM Leap Year Square Wave Output SRAM Unique ID
Microchip Technology MCP79512T-I/MN	85 °C	-40 °C	1 µA	3.6 V	1.3 V	HH:MM:SS:hh (12/24 hr)	Clock/Calendar	SPI	10-TDFN (3x3)	Surface Mount	10-WFDFN Exposed Pad			3.6 V	1.8 V	64 B	Alarm EEPROM Leap Year Square Wave Output SRAM Unique ID

Catalog

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

Key Features

• * General purpose SPI RTCC with features that target low power, security & communications applications.

• Low Power Operation

- VCC Min = 1.8V

- Icc < 5 µA Typical Standby Current

• Low Backup Power

- VBAT Min = 1.3V

- Ibat < 700nA Typical Timekeeping & SRAM Retention Current

• Automatic Battery Switchover with Timestamp

- VCC to VBAT (VCC Lost)

- VBAT to VCC (VCC Restored)

• Dual configurable alarms with a 0.01 sec count on one alarm

- IRQ (VCC or VBAT)

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

• Digital Trimming Range from -255 to + 255 ppm in 1 ppm steps

- Adjusts up to 22 seconds/day

• EEPROM has 8 Bytes/Page with Block Sector write protection

- Protect: None, 1/4, 1/2 or all of array

• Factory standard MAC address programming or custom ID available

Description

The MCP79512 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 64-bit MAC Address, but it can also be ordered blank for the end user to program.