Microchip Mcp7940m-ı/p Low-cost I2c Rtcc With Sram Rtc Gerçek Zaman Saati

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

Microchip RTC Gerçek Zaman Saati

The MCP7940M I ²C ^TM 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