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Datasheet Microchip MCP7940N

ManufacturerMicrochip
SeriesMCP7940N

The MCP7940N series of low-power Real-Time Clocks (RTC) uses digital timing compensation for an accurate clock/calendar, a programmable output control for versatility, and a power sense circuit that automatically switches to the backup supply

Datasheets

  • Download » Datasheet PDF, 1.4 Mb, File published: Mar 20, 2014
    MCP7940N Low-Cost I2C Real-Time Clock/Calendar with SRAM and Battery Switchover
    Docket ↓
    MCP7940N
    Battery-Backed I2Cв„ў Real-Time Clock/Calendar with SRAM
    Timekeeping Features: Operating Ranges: 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 Power-Fail Time-Stamp:
    -Time logged on switchover to and from
    Battery mode 2-Wire Serial Interface, I2Cв„ў Compatible
    -I2C clock rate up to 400 kHz Temperature Range:
    -Industrial (I): -40В°C to +85В°C
    -Extended (E): -40В°C to +125В°C Low-Power Features: Wide Voltage Range:
    -Operating voltage range of 1.8V to 5.5V
    -Backup voltage range of 1.3V to 5.5V Low Typical Timekeeping Current:
    -Operating from VCC: 1.2 ВµA at 3.3V
    -Operating from battery backup: 925 nA at
    3.0V Automatic Switchover to Battery Backup User Memory: 64-byte Battery-Backed SRAM Packages: 8-Lead SOIC, MSOP, TSSOP, PDIP and 2x3 ...

Prices

Status

MCP7940N-E/MSMCP7940N-E/SNMCP7940N-I/MSMCP7940N-I/PMCP7940N-I/SNMCP7940N-I/STMCP7940NT-E/MSMCP7940NT-E/SNMCP7940NT-E/SNVAOMCP7940NT-I/MNYMCP7940NT-I/MSMCP7940NT-I/SNMCP7940NT-I/ST
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)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

MCP7940N-E/MSMCP7940N-E/SNMCP7940N-I/MSMCP7940N-I/PMCP7940N-I/SNMCP7940N-I/STMCP7940NT-E/MSMCP7940NT-E/SNMCP7940NT-E/SNVAOMCP7940NT-I/MNYMCP7940NT-I/MSMCP7940NT-I/SNMCP7940NT-I/ST
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)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)-127 to +127ppm (1 ppm steps)-127 to +127ppm (1 ppm steps)-127 to +127ppm (1 ppm steps)-127 to +127ppm (1 ppm steps)
Ibat Current, nA700700700700700700700700700700700700700
InterfaceI²C™I²C™I²C™I²C™I²C™I²C™I²C™I²C™I²C™I²C™I²C™I²C™I²C™
Operating Temperature Range, °C-40 to +125-40 to +125-40 to +85-40 to +85-40 to +85-40 to +85-40 to +125-40 to +125-40 to +85-40 to +85-40 to +85-40 to +85
OutputsIRQ/CLKIRQ/CLKIRQ/CLKIRQ/CLKIRQ/CLKIRQ/CLKIRQ/CLKIRQ/CLKIRQ/CLKIRQ/CLKIRQ/CLKIRQ/CLKIRQ/CLK
Power-Fail TimestampVCC Fail and VCC RestoreVCC Fail and VCC RestoreVCC Fail and VCC RestoreVCC Fail and VCC RestoreVCC Fail and VCC RestoreVCC Fail and VCC RestoreVCC Fail and VCC RestoreVCC Fail and VCC RestoreVCC Fail and VCC RestoreVCC Fail and VCC RestoreVCC Fail and VCC RestoreVCC Fail and VCC RestoreVCC Fail and VCC Restore
Temperature Range-40 to +125-40 to +125-40 to +125-40 to +125-40 to +125-40 to +125-40 to +125-40 to +125-40 to +125-40 to +125-40 to +125-40 to +125-40 to +125
Unique ID, MAC_AddressNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNone
User SRAM, Bytes64646464646464646464646464
Vbat Range, V1.3 - 5.51.3 - 5.51.3 - 5.51.3 - 5.51.3 - 5.51.3 - 5.51.3 - 5.51.3 - 5.51.3 - 5.51.3 - 5.51.3 - 5.51.3 - 5.51.3 - 5.5
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 - 5.51.8 - 5.51.8 - 5.51.8 - 5.51.8 - 5.5

Eco Plan

MCP7940N-E/MSMCP7940N-E/SNMCP7940N-I/MSMCP7940N-I/PMCP7940N-I/SNMCP7940N-I/STMCP7940NT-E/MSMCP7940NT-E/SNMCP7940NT-E/SNVAOMCP7940NT-I/MNYMCP7940NT-I/MSMCP7940NT-I/SNMCP7940NT-I/ST
RoHSCompliantCompliantCompliantCompliantCompliantCompliantCompliantCompliantCompliantCompliantCompliantCompliantCompliant

Moldel Line

Series: MCP7940N (13)

Manufacturer's Classification

  • Clock and Timing > Real-Time Clock > RTCC

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