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

Datasheet PDF, 1.4 Mb, File published: Mar 20, 2014
MCP7940N Low-Cost I2C Real-Time Clock/Calendar with SRAM and Battery Switchover
Docket

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

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
PackageMSOPSOICMSOPPDIPSOICTSSOPMSOPSOICSOICTDFNMSOPSOICTSSOP
Pins8888888888888

Parametrics

Parameters / ModelsMCP7940N-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

Model Line

Manufacturer's Classification