MCP79520 Series

Battery-Backed SPI Real-Time Clock/Calendar

Catalog

Battery-Backed SPI Real-Time Clock/Calendar

Part	Voltage - Supply [Max]	Voltage - Supply [Min]	Memory Size	Voltage - Supply, Battery [Max]	Voltage - Supply, Battery [Min]	Operating Temperature [Max]	Operating Temperature [Min]	Mounting Type	Interface	Features	Type	Supplier Device Package	Package / Case	Time Format	Current - Timekeeping (Max)	Package / Case [x]	Package / Case [x]
Microchip Technology MCP79520T-I/MN	3.6 V	1.8 V	64 B	3.6 V	1.3 V	85 °C	-40 °C	Surface Mount	SPI	Alarm EEPROM Leap Year Square Wave Output SRAM Unique ID	Clock/Calendar	10-TDFN (3x3)	10-WFDFN Exposed Pad	HH:MM:SS:hh (12/24 hr)	1 µA
Microchip Technology MCP79520-I/MS	3.6 V	1.8 V	64 B	3.6 V	1.3 V	85 °C	-40 °C	Surface Mount	SPI	Alarm EEPROM Leap Year Square Wave Output SRAM Unique ID	Clock/Calendar	10-MSOP	10-MSOP 10-TFSOP	HH:MM:SS:hh (12/24 hr)	1 µA	3 mm	0.118 in
Microchip Technology MCP79520T-I/MS	3.6 V	1.8 V	64 B	3.6 V	1.3 V	85 °C	-40 °C	Surface Mount	SPI	Alarm EEPROM Leap Year Square Wave Output SRAM Unique ID	Clock/Calendar	10-MSOP	10-MSOP 10-TFSOP	HH:MM:SS:hh (12/24 hr)	1 µA	3 mm	0.118 in

Catalog

Battery-Backed SPI Real-Time Clock/Calendar

Key Features

• * VCC Min = 1.8V

• * Icc < 5 µA (Typical Standby Current)

• * VBAT Min = 1.3V

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

• * VCC to VBAT (VCC Lost)

• * VBAT to VCC (VCC Restored)

• * IRQ (VCC or VBAT)

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

• * Adjusts up to 22 seconds/day

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

• * Factory standard MAC address programming or custom ID available

Description

The MCP79520 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 blank unique ID in a locked section of EEPROM. The ID is blank in this device, but can also be ordered with a 48-bit or 64-bit MAC Address.