MCP795W20 Series

Enhanced Feature Battery-Backed SPI Real-Time Clock/Calendar

Catalog

Enhanced Feature Battery-Backed SPI Real-Time Clock/Calendar

Part	Features	Current - Timekeeping (Max)	Time Format	Voltage - Supply [Max]	Voltage - Supply [Min]	Interface	Package / Case [x]	Package / Case [y]	Package / Case	Memory Size	Type	Mounting Type	Voltage - Supply, Battery [Max]	Voltage - Supply, Battery [Min]	Operating Temperature [Max]	Operating Temperature [Min]	Supplier Device Package	Package / Case [custom]	Package / Case [custom]
Microchip Technology MCP795W20-I/SL	Alarm EEPROM Leap Year Square Wave Output SRAM Watchdog Timer	1 µA	HH:MM:SS:hh (12/24 hr)	3.6 V	1.8 V	SPI	0.154 in	3.9 mm	14-SOIC	64 B	Clock/Calendar	Surface Mount	3.6 V	1.3 V	85 °C	-40 °C
Microchip Technology MCP795W20T-I/SL	Alarm EEPROM Leap Year Square Wave Output SRAM Watchdog Timer	1 µA	HH:MM:SS:hh (12/24 hr)	3.6 V	1.8 V	SPI	0.154 in	3.9 mm	14-SOIC	64 B	Clock/Calendar	Surface Mount	3.6 V	1.3 V	85 °C	-40 °C
Microchip Technology MCP795W20T-I/ST	Alarm EEPROM Leap Year Square Wave Output SRAM Watchdog Timer	1 µA	HH:MM:SS:hh (12/24 hr)	3.6 V	1.8 V	SPI			14-TSSOP	64 B	Clock/Calendar	Surface Mount	3.6 V	1.3 V	85 °C	-40 °C	14-TSSOP	0.173 "	4.4 mm
Microchip Technology MCP795W20-I/ST	Alarm EEPROM Leap Year Square Wave Output SRAM Watchdog Timer	1 µA	HH:MM:SS:hh (12/24 hr)	3.6 V	1.8 V	SPI			14-TSSOP	64 B	Clock/Calendar	Surface Mount	3.6 V	1.3 V	85 °C	-40 °C	14-TSSOP	0.173 "	4.4 mm

Catalog

Enhanced Feature Battery-Backed SPI Real-Time Clock/Calendar

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

• * Factory standard MAC address programming or custom ID available

Description

The MCP795W20 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. By adding a watchdog timer and two programmable event detect inputs, lower power and more system robustness can be achieved by performing these functions in the RTCC, thus allowing the MCU to sleep for longer periods of time.