Battery-Backed SPI Real-Time Clock/Calendar
MCP7951X/MCP7952X
Battery-Backed SPI Real-Time Clock/Calendar
Device Selection Table
Part Number
MCP79510 MCP79520 MCP7...
Description
MCP7951X/MCP7952X
Battery-Backed SPI Real-Time Clock/Calendar
Device Selection Table
Part Number
MCP79510 MCP79520 MCP79511 MCP79521 MCP79512 MCP79522
SRAM (Bytes)
64 64 64 64 64 64
Timekeeping Features
Real-Time Clock/Calendar (RTCC): - Hours, minutes, seconds, hundredths of a second, day of week, date, 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: - ±1 ppm resolution - ±259 ppm range
Dual Programmable Alarms Clock Output Function with Selectable Frequency Power-Fail Timestamp:
- Time logged on switchover to and from Battery mode
Low-Power Features
Wide Voltage Range: - Operating voltage range of 1.8V to 3.6V - Backup voltage range of 1.3V to 3.6V
Low Typical Timekeeping Current: - Operating from VCC: 1.2 µA at 3.0V - Operating from VBAT: 1.0 µA at 3.0V
Automatic Switchover to Battery Backup
User Memory
64-Byte Battery-Backed SRAM 1 Kbit or 2 Kbit EEPROM:
- Software write-protect - Page write up to 8 bytes - Endurance: 1M erase/write cycles
EEPROM (Kbits)
1 2 1 2 1 2
Unique ID
Blank
Blank EUI-48™ EUI-48™ EUI-64™ EUI-64™
128-Bit Protected EEPROM Area: - Robust write unlock sequence - EUI-48™ MAC address (MCP795X1) - EUI-64™ MAC address (MCP795X2)
Operating Ranges
SPI Serial Interface: - SPI clock rate up to 5 MHz
Temperature Range: - Industrial (I): -40°C to +85°C
Automotive AEC-Q100 Qualified
Packages
10-Lead MSO...
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