MCP7940M RTC

MCP7940M-I/P Low-Cost I2C RTCC with SRAM

Microchip RTC Gerçek Zaman Saati

The MCP7940M I2CTM compatible real-time clock/calendar (RTCC) includes SRAM and a digital trimming circuit for accuracy which is normally found in higher priced devices. Using a low-cost 32,768 kHz crystal or other clock source, time is tracked in either a 12-hour or 24-hour format with an AM/PM indicator and timing to the second, minute, hour, day of the week, day, month and year. As an interrupt or wakeup signal, a multifunction open drain output can be programmed as an Alarm Out or as a Clock Out that supports 4 selectable frequencies.

Features

• Timekeeping
• Real-Time Clock/Calendar (RTCC)
• Hours, Minutes, Seconds, Day of Week, Day, Month, Year
• Leap year compensated to 2399
• 12/24 hour modes
• On-Chip Digital Trimming/Calibration
• 1 PPM Resolution
• ±129 PPM Range
• Dual Programmable Alarms
• Versatile Output Pin
• Clock output with selectable frequency
• Alarm output
• General Purpose output
• 64 Bytes SRAM
• 2-Wire Serial Interface, I2C™Compatible
• I2C Clock Frequency up to 400 kHz
• Low-Power
• Wide Voltage Range
• Operating Voltage 1.8V to 5.5V
• Low Typical Timekeeping Current

• Type Clock/Calendar
• Features Alarm, Leap Year, Square Wave Output, SRAM
• Memory Size 64B
• Time Format HH:MM:SS (12/24 hr)
• Date Format YY-MM-DD-dd
• Interface I²C, 2-Wire Serial
• Voltage - Supply 1.8 V ~ 5.5 V
• Voltage - Supply, Battery -
• Current - Timekeeping (Max) 1µA @ 5.5V
• Operating Temperature -40°C ~ 85°C
• Mounting Type Through Hole
• Package / Case 8-DIP (0.300", 7.62mm)
• Supplier Device Package 8-PDIP