MCP79412

The MCP79412 general purpose I2C™Compatible real-time clock/calendar (RTCC) is highly integrated with nonvolatile memory and advanced features normally found in higher priced devices. These features include a battery switchover circuit for backup power, a timestamp to log power failures and digital trimming for accuracy. 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. In addition, non-volatile memory is included along with a Unique ID in a locked section of EEPROM that is factory programmed with an EUI-48 MAC Address.

产品特性
  • Battery-Backed Real-Time Clock/Calendar (RTCC) Hours, Minutes, Seconds, Day of Week, Day, Month, Year Leap year compensated  to 2399 12/24 hour modes
  • 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
  • 1 PPM Resolution
  • ±129 PPM Range
  • Dual Programmable Alarms
  • Versatile Output Pin Clock output with selectable frequency Alarm output General Purpose output
  • Clock output with selectable frequency
  • Alarm output
  • General Purpose output
  • Power-Fail Time-Stamp Time logged on switchover to and from Battery Backup
  • Time logged on switchover to and from Battery Backup
  • 2-Wire Serial Interface, I2C™Compatible I2C Clock Frequency up to 400 kHz
  • I2C Clock Frequency up to 400 kHz
  • 64 Bytes Battery-Backed SRAM
  • 1Kb EEPROM Memory
  • 64-bit Protected EEPROM Area Robust write unlock sequence Preprogrammed EUI-64™ MAC Address
  • Robust write unlock sequence
  • Preprogrammed EUI-64™ MAC Address
  • Wide Voltage Range Operating Voltage 1.8V to 5.5V Backup Voltage 1.3V to 5.5V
  • Operating Voltage 1.8V to 5.5V
  • Backup Voltage 1.3V to 5.5V
  • Low Typical Timekeeping Current
  • Automatic Switchover to Battery Backup
技术参数
Parameter Name Value Value
Max Communications Speed 400 KHz 400 KHz
Pin Count 8 8
Minimum Clock Count (seconds) 1 sec 1 sec
Battery-backed SRAM (Bytes) 64 64
EEPROM (Kbits) 1 1
Unique ID (bits) 64 64
Unique ID Programming EUI-64 EUI-64
Temperature Range (C) -40 to +85 -40 to +85
文档资料
MCP79410/11/12 I2C Battery-Backed I2C RTCC w/SRAM, EEPROM and Protected EEPROMData Sheets01/14/2015926KB
MCP7941X Family Silicon ErrataErrata12/15/2015113KB
AN1355 - A Complete Electronic Watch Based on MCP79410 I2C? RTCCAppNote06/23/2016154KB
AN1364 - Using the Alarm Feature on the MCP79410 RTCC to Implement a Delayed AlarmAppNote10/20/2010123KB
AN1365 - Recommended Usage of Microchip Serial RTCC DevicesAppNote03/28/2013267KB
AN1413 - Temperature Compensation of a Tuning Fork Crystal Based on MCP79410AppNote11/07/2011479KB
AN1414 - Using HI-TECH C Compiler to Interface RTCC Devices to 8-Bit PIC MCUsAppNote01/31/20124847KB
AN1491 - Configuring the MCP794XX RTCC FamilyAppNote01/25/2013246KB
AN1496 - Debugging Stand-Alone Real-Time Clock/Calender-based ApplicationsAppNote02/22/2013215KB
AN1519 - Recommended Crystals for Microchip Stand-Alone Real-Time Clock/Calendar DevicesAppNote09/16/2013397KB
AN2027 - Backup Power Sources for Microchip's RTCCs and SRAMsAppNote12/01/2015161KB
TB3116 - Questions and Answers Concerning MCP79XXX Serial RTCCsAppNote08/11/201475KB
Enabling Intelligent Automation Using the MCP7941X I2C RTCCTech Briefs10/21/201074KB
I2C & SPI Real-Time Clock/Calendar Sell SheetBrochures07/21/2014703KB
MCP794xx I2C Real-Time Clock/Calendar BrochureBrochures10/27/2010141KB
Utility Metering BrochureBrochures10/06/20143370KB
MCP794xx Reference Layout Gerber FilesGerber Files05/25/201150KB
AN1355 PIC18F Source CodeSample Code08/21/201261KB
AN1355 PIC24F Source CodeSample Code08/21/2012152KB
订购型号
Part NumberLeadsPackage TypeTemp RangePacking1+26+100+1000+5000+
MCP79412-I/MS8MSOP-40C to +85CTUBE1.020.940.890.840.82
MCP79412-I/SN8SOIC-40C to +85CTUBE0.980.910.860.810.78
MCP79412-I/ST8TSSOP-40C to +85CTUBE1.020.940.890.840.82
MCP79412T-I/MNY8TDFN-40C to +85CT/R1.060.980.930.870.85
MCP79412T-I/MS8MSOP-40C to +85CT/R1.020.940.890.840.82
MCP79412T-I/SN8SOIC-40C to +85CT/R0.980.910.860.810.78
MCP79412T-I/ST8TSSOP-40C to +85CT/R1.020.940.890.840.82
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器件无铅环保信息
PartNumberDeviceWeightShippingWeightLeadCountPackageTypePackageWidthSolderCompositionJEDECIndicatorRoHSChinaEFUP
MCP79412-I/SN0.0780000.1600008SOIC.150In(3.90mm)Matte Tine3
MCP79412T-I/SN0.0780000.2303038SOIC.150In(3.90mm)Matte Tine3
MCP79412-I/ST0.0330000.0900008TSSOP4.4mmMatte Tine3
MCP79412T-I/ST0.0330000.2156008TSSOP4.4mmMatte Tine3
MCP79412T-I/MS0.0256000.2156008MSOP3x3mmMatte Tine3
MCP79412-I/MS0.0256000.0700008MSOP3x3mmMatte Tine3
MCP79412T-I/MNY0.0143000.2484858TDFN2x3x0.8mmNiPdAue4
MCP79410/11/12 I2C Battery-Backed I2C RTCC w/SRAM, EEPROM and Protected EEPROM MCP79412
MCP7941X Family Silicon Errata MCP79412
AN1355 MCP79412
AN1355 Source Code MCP79412
AN1364 MCP79412
AN1364 Source Code MCP79412
AN1365 MCP795W22
AN1413 MCP795W22
AN1413 Source Code MCP795W22
AN1414 MCP79412
Source Code AN1414 MCP79412
AN1491 MCP79412
01491 Source Code MCP79412
AN1491 Source Code MCP79412
AN1496 MCP79412
AN1519 MCP795W22
AN2027 MCP795W22
TB3116 MCP795W22
Enabling Intelligent Automation Using the MCP7941X I2C RTCC MCP79412
I2C & SPI Real-Time Clock/Calendar Sell Sheet MCP795W22
MCP794xx I2C Real-Time Clock/Calendar Brochure MCP79412
Utility Metering Brochure SST39WF800B
MCP794xx Reference Layout Gerber Files MCP79412
AN1355 PIC18F Source Code MCP79412
AN1355 PIC24F Source Code MCP79412
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