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Datasheet Microchip MCP7940M

ManufacturerMicrochip
SeriesMCP7940M

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

Datasheets

  • Download » Datasheet PDF, 1.3 Mb, File published: Jun 23, 2014
    MCP7940M Low-Cost I2C RTCC with SRAM
    Docket ↓
    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 ...

Prices

Status

MCP7940M-I/MSMCP7940M-I/PMCP7940M-I/SNMCP7940M-I/STMCP7940MT-I/MNYMCP7940MT-I/MSMCP7940MT-I/SNMCP7940MT-I/STMCP7940MT-I/STVAO
Lifecycle StatusProduction (Appropriate for new designs but newer alternatives may exist)Production (Appropriate for new designs but newer alternatives may exist)Production (Appropriate for new designs but newer alternatives may exist)Production (Appropriate for new designs but newer alternatives may exist)Production (Appropriate for new designs but newer alternatives may exist)Production (Appropriate for new designs but newer alternatives may exist)Production (Appropriate for new designs but newer alternatives may exist)Production (Appropriate for new designs but newer alternatives may exist)Production (Appropriate for new designs but newer alternatives may exist)

Packaging

Parametrics

MCP7940M-I/MSMCP7940M-I/PMCP7940M-I/SNMCP7940M-I/STMCP7940MT-I/MNYMCP7940MT-I/MSMCP7940MT-I/SNMCP7940MT-I/STMCP7940MT-I/STVAO
Alarms2 Alarms (1 sec)2 Alarms (1 sec)2 Alarms (1 sec)2 Alarms (1 sec)2 Alarms (1 sec)2 Alarms (1 sec)2 Alarms (1 sec)2 Alarms (1 sec)2 Alarms (1 sec)
Digital_Trimming-127 to +127ppm (1 ppm steps)-127 to +127ppm (1 ppm steps)-127 to +127ppm (1 ppm steps)-127 to +127ppm (1 ppm steps)-127 to +127ppm (1 ppm steps)-127 to +127ppm (1 ppm steps)-127 to +127ppm (1 ppm steps)-127 to +127ppm (1 ppm steps)-127 to +127ppm (1 ppm steps)
InterfaceI²C™I²C™I²C™I²C™I²C™I²C™I²C™I²C™I²C™
Operating Temperature Range, °C-40 to +85-40 to +85-40 to +85-40 to +85-40 to +85-40 to +85-40 to +85-40 to +85
OutputsIRQ/CLKIRQ/CLKIRQ/CLKIRQ/CLKIRQ/CLKIRQ/CLKIRQ/CLKIRQ/CLKIRQ/CLK
Temperature Range-40 to +85-40 to +85-40 to +85-40 to +85-40 to +85-40 to +85-40 to +85-40 to +85-40 to +85
Unique ID, MAC_AddressNoneNoneNoneNoneNoneNoneNoneNoneNone
User SRAM, Bytes646464646464646464
Vcc Range, V1.8 - 5.51.8 - 5.51.8 - 5.51.8 - 5.51.8 - 5.51.8 - 5.51.8 - 5.51.8 - 5.51.8 - 5.5

Eco Plan

MCP7940M-I/MSMCP7940M-I/PMCP7940M-I/SNMCP7940M-I/STMCP7940MT-I/MNYMCP7940MT-I/MSMCP7940MT-I/SNMCP7940MT-I/STMCP7940MT-I/STVAO
RoHSCompliantCompliantCompliantCompliantCompliantCompliantCompliantCompliantCompliant

Moldel Line

Series: MCP7940M (9)

Manufacturer's Classification

  • Clock and Timing > Real-Time Clock > RTCC

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