MCP79521
The MCP79521 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.
产品特性- Low Power Operation VCC Min = 1.8V Icc < 5 µA (Typical Standby Current)
- VCC Min = 1.8V
- Icc < 5 µA (Typical Standby Current)
- Low Backup Power VBAT Min = 1.3V Ibat < 700nA Typical Timekeeping & SRAM Retention Current
- VBAT Min = 1.3V
- Ibat < 700nA Typical Timekeeping & SRAM Retention Current
- Automatic Battery Switchover with Timestamp VCC to VBAT (VCC Lost) VBAT to VCC (VCC Restored)
- VCC to VBAT (VCC Lost)
- VBAT to VCC (VCC Restored)
- Dual configurable alarms with a 0.01 sec count on one alarm IRQ (VCC or VBAT)
- IRQ (VCC or VBAT)
- Clock Out frequencies: 32.768, 8.192 & 4.096 KHz and 1 Hz
- Digital Trimming Range from -255 to + 255 ppm in 1 ppm steps Adjusts up to 22 seconds/day
- Adjusts up to 22 seconds/day
- EEPROM has 8 Bytes/Page with Block Sector write protection Protect: None, 1/4, 1/2 or all of array
- Protect: None, 1/4, 1/2 or all of array
- Factory standard MAC address programming or custom ID available
| 技术参数|
Parameter Name
Value
| Value | |
Max Communications Speed
10 MHz
|
10 MHz
| |
Pin Count
10
|
10
| |
Minimum Clock Count (seconds)
0.01 sec
|
0.01 sec
| |
Battery-backed SRAM (Bytes)
64
|
64
| |
EEPROM (Kbits)
2
|
2
| |
Unique ID (bits)
128
|
128
| |
Unique ID Programming
EUI-48
|
EUI-48
| |
Temperature Range (C)
-40 to +85
|
-40 to +85
|
|
文档资料
| MCP795XX 3V SPI RTCC Data Sheet | Data Sheets | 04/17/2012 | 905KB | |
|
| MCP795XX Family Silicon Errata | Errata | 12/15/2015 | 65KB | |
|
| 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 | |
| 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 | |
订购型号
| Part Number | Leads | Package Type | Temp Range | Packing | 1+ | 26+ | 100+ | 1000+ | 5000+ |
|---|
| MCP79521-I/MS | 10 | MSOP | -40C to +85C | TUBE | 1.28 | 1.18 | 1.12 | 1.06 | 1.02 |
| MCP79521T-I/MN | 10 | TDFN | -40C to +85C | T/R | 1.28 | 1.18 | 1.12 | 1.06 | 1.02 |
| MCP79521T-I/MS | 10 | MSOP | -40C to +85C | T/R | 1.28 | 1.18 | 1.12 | 1.06 | 1.02 |
相类似产品
器件无铅环保信息
| PartNumber | DeviceWeight | ShippingWeight | LeadCount | PackageType | PackageWidth | SolderComposition | JEDECIndicator | RoHS | ChinaEFUP |
|---|
| MCP79521-I/MS | 0.023200 | 0.060000 | 10 | MSOP | 3x3mm | Matte Tin | e3 |  |  |
| MCP79521T-I/MS | 0.023200 | 0.200000 | 10 | MSOP | 3x3mm | Matte Tin | e3 | | |
| MCP79521T-I/MN | 0.021000 | 0.228788 | 10 | TDFN | 3x3x0.8mm | Matte Tin | e3 | | |
