MCP795W11 Series

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

Catalog

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

Part	Current - Timekeeping (Max)	Type	Voltage - Supply [Max]	Voltage - Supply [Min]	Operating Temperature [Max]	Operating Temperature [Min]	Memory Size	Voltage - Supply, Battery [Max]	Voltage - Supply, Battery [Min]	Package / Case [x]	Package / Case [y]	Package / Case	Mounting Type	Time Format	Interface	Features	Supplier Device Package	Package / Case [custom]	Package / Case [custom]
Microchip Technology MCP795W11T-I/SL	1 µA	Clock/Calendar	3.6 V	1.8 V	85 °C	-40 °C	64 B	3.6 V	1.3 V	0.154 in	3.9 mm	14-SOIC	Surface Mount	HH:MM:SS:hh (12/24 hr)	SPI	Alarm EEPROM Leap Year Square Wave Output SRAM Unique ID Watchdog Timer
Microchip Technology MCP795W11T-I/ST	1 µA	Clock/Calendar	3.6 V	1.8 V	85 °C	-40 °C	64 B	3.6 V	1.3 V			14-TSSOP	Surface Mount	HH:MM:SS:hh (12/24 hr)	SPI	Alarm EEPROM Leap Year Square Wave Output SRAM Unique ID Watchdog Timer	14-TSSOP	0.173 "	4.4 mm

Catalog

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

Key Features

• * VCC Min = 1.8V

• * Icc < 1 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)

• * WDO (VCC)

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

• * Adjusts up to 22 seconds/day

• * SPI Bus or EVHS digital input

• * High speed with programmable pulse count (EVHS)

• * Low speed with programmable debounce delay (EVLS)

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

• * Unique ID is factory programmed with MAC Address

Description

The MCP795W11 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 that is preprogrammed with a 48-bit MAC Address that can also be ordered blank for the end user to program. By adding a watchdog timer and two programmable event detect inputs, lower power and more system robustness can be achieved by off-loading MCU functions and allowing it to sleep for longer periods of time.