Datasheet Microchip MCP7940M-I/P — Datenblatt

MCP7940M
Low-Cost I2Cв„ў Real-Time Clock/Calendar with SRAM
Timekeeping Features: General Description: Real-Time Clock/Calendar (RTCC):
-Hours, Minutes, Seconds, Day of Week, Day,
Month, Year
-Leap year compensated to 2399
-12/24 hour modes Oscillator for 32.768 kHz Crystals:
-Optimized for 6-9 pF crystals On-Chip Digital Trimming/Calibration:
-В±1 PPM resolution
-В±129 PPM range Dual Programmable Alarms Versatile Output Pin:
-Clock output with selectable frequency
-Alarm output
-General purpose output The MCP7940M Real-Time Clock/Calendar (RTCC)
tracks time using internal counters for hours, minutes,
seconds, days, months, years, and day of week.
Alarms can be configured on all counters up to and
including months. For usage and configuration, the
MCP7940M supports I2C communications up to 400
kHz. Low-Power Features: Package Types Wide Voltage Range:
-Operating voltage range of 1.8V to 5.5V Low Typical Timekeeping Current:
-Operating from VCC: 1.2 ВµA at 3.3V User Memory: 64-byte SRAM The open-drain, multi-functional output can be
configured to assert on an alarm match, to output a
selectable frequency square wave, or as a general …