The MCP795W21 SPI RTCC is highly integrated with memory and advanced features normally found in higher priced devices. By starting with a basic real-time clock, digital trimming was added for higher accuracy, a battery switchover for backup power, a timestamp to log power failures and three types of memory, which includes SRAM, EEPROM and a unique ID in a locked section of EEPROM. This ID is preprogrammed with a 48-bit MAC Address, but it can also be ordered blank for the end user to program. By adding a watchdog timer and two programmable event detect inputs, lower power and more system robustness can be achieved by performaing these functions in the RTCC and allowing the MCU to sleep for longer periods of time.
Features
| Parameter
|
MCP795W1X/MCP795W2X SPI RTCC with Enhanced Features and Battery Switchover | Data Sheets | 06/21/2016 | 854KB | |
MCP795WXX Family Silicon Errata and Data Sheet Clarification | Errata | 12/15/2015 | 70KB | |
AN1365 - Recommended Usage of Microchip Serial RTCC Devices | AppNote | 03/28/2013 | 267KB | ![]() |
AN1412 - How to Calculate UNIX Time Using a PIC18 Microcontroller and the MCP795W20 SPI RTCC | AppNote | 01/31/2012 | 318KB | ![]() |
AN1413 - Temperature Compensation of a Tuning Fork Crystal Based on MCP79410 | AppNote | 11/07/2011 | 479KB | ![]() ![]() |
AN1519 - Recommended Crystals for Microchip Stand-Alone Real-Time Clock/Calendar Devices | AppNote | 09/16/2013 | 397KB | ![]() |
AN1564 - Configuring and Using the Event Detection Module of MCP795WXX RTCCs | AppNote | 09/16/2013 | 305KB | ![]() ![]() |
AN1565 - Configuring and Using the WDT Module of MCP795WXX Real-Time Clock/Calendars | AppNote | 09/16/2013 | 290KB | ![]() ![]() |
AN1950 - Configuring and Using the MCP795WXX SPI RTCC for Basic Timekeeping, Based on a PIC18 | AppNote | 06/08/2015 | 146KB | ![]() ![]() |
AN2027 - Backup Power Sources for Microchip's RTCCs and SRAMs | AppNote | 12/01/2015 | 161KB | ![]() |
AN2140 - Configuring and Using the Alarm Module of the MCP795WXX Real-Time Clock/Calendars | AppNote | 05/11/2016 | 154KB | ![]() ![]() |
TB3116 - Questions and Answers Concerning MCP79XXX Serial RTCCs | AppNote | 08/11/2014 | 75KB | ![]() |
I2C & SPI Real-Time Clock/Calendar Sell Sheet | Brochures | 07/21/2014 | 703KB |
Part Number | Leads | Package Type | Temp Range | Packing | 1+ | 26+ | 100+ | 1000+ | 5000+ |
---|---|---|---|---|---|---|---|---|---|
MCP795W21-I/SL | 14 | SOIC | -40C to +85C | TUBE | 1.68 | 1.55 | 1.47 | 1.39 | 1.34 |
MCP795W21-I/ST | 14 | TSSOP | -40C to +85C | TUBE | 1.72 | 1.59 | 1.51 | 1.42 | 1.38 |
MCP795W21T-I/SL | 14 | SOIC | -40C to +85C | T/R | 1.68 | 1.55 | 1.47 | 1.39 | 1.34 |
MCP795W21T-I/ST | 14 | TSSOP | -40C to +85C | T/R | 1.72 | 1.59 | 1.51 | 1.42 | 1.38 |
Product | Price5K |
---|---|
MCP79400 | $0.66 |
MCP79401 | $0.72 |
MCP79402 | $0.72 |
MCP7940M | $0.46 |
MCP7940N | $0.59 |
MCP79410 | $0.72 |
MCP79411 | $0.78 |
MCP79412 | $0.78 |
MCP79510 | $0.90 |
MCP79511 | $0.96 |
MCP79512 | $0.96 |
MCP79520 | $0.96 |
MCP79521 | $1.02 |
MCP79522 | $1.02 |
MCP795W10 | $1.22 |
MCP795W11 | $1.28 |
MCP795W12 | $1.28 |
MCP795W20 | $1.28 |
MCP795W21 | $1.34 |
MCP795W22 | $1.34 |
PartNumber | DeviceWeight | ShippingWeight | LeadCount | PackageType | PackageWidth | SolderComposition | JEDECIndicator | RoHS | ChinaEFUP |
---|---|---|---|---|---|---|---|---|---|
MCP795W21-I/ST | 0.060000 | 0.125000 | 14 | TSSOP | 4.4mm | Matte Tin | e3 | ![]() | ![]() |
MCP795W21T-I/ST | 0.060000 | 0.246800 | 14 | TSSOP | 4.4mm | Matte Tin | e3 | ![]() | ![]() |
MCP795W21-I/SL | 0.143200 | 0.280702 | 14 | SOIC | .150In(3.90mm) | Matte Tin | e3 | ![]() | ![]() |
MCP795W21T-I/SL | 0.143200 | 0.325000 | 14 | SOIC | .150In(3.90mm) | Matte Tin | e3 | ![]() | ![]() |