Microchip Technology MCP795xx / MCP795Wxx RTCCs
Microchip Technology MCP795xx / MCP795Wxx Real-Time Clock Calendar ICs (RTCCs) are 10-pin devices that provide accurate timekeeping over a wide temperature range, power-failure monitoring, and on-chip nonvolatile memory. These small-package devices offer many of the same features as the larger 14-pin MCP795Wxx family.
Microchip MCP795xx devices reduce overall component count in the system and eliminate user programming costs for a serial ID, making these RTCCs an ideal choice for the handheld, wireless, and consumer markets. These devices include 64 bytes of SRAM, 2 Kbits of EEPROM, and a 128-bit Unique ID that can be ordered blank or pre-programmed with a MAC address.
MCP795xx RTCCs provide a wide digital trimming range, providing customers with high accuracy over a large temperature range. These Microchip devices also provide an on-chip power-fail timestamp feature that is not offered on any other SPI RTCC in the industry.
Features
- MCP795xx Features
- Timekeeping
- Real-Time Clock/Calendar: Hours, Minutes, Seconds, Hundredth of Seconds, Day of Week, Month, Year, Leap Year
- Crystal Oscillator requires External 32,768 kHz Tuning Fork Crystal and Load Capacitors.
- Clock Out Function: 1Hz, 4.096kHz, 8.192kHz, 32.768kHz
- 2 Programmable Alarms
- Programmable open-drain output - Alarm or Interrupt
- On-Chip Digital Trimming/Calibration: +/- 255PPM range in 1PPM steps
- Power-Fail Time-Stamp @ Battery Switchover: Logs time when VCC fails and VCC is restored
- Low-Power
- Wide Operating Voltage:
- VCC: 1.8V to 3.6V
- VBAT: 1.3V to 3.6V
- Low Operating Current:
- VCC Standby Current < 1uA @ 3V
- VBAT Timekeeping Current: <700nA @ 1.8V
- Automatic Battery Switchover from VCC to VBAT: Backup power for timekeeping and SRAM retention
- User Memory
- 64-Byte Battery-Backed SRAM
- 2Kbit and 1Kbit EEPROM Memory
- 128-Bit Unique ID in Protected Area of EEPROM:
- Available blank or pre-programmed
- EUI-48™ or EUI-64™ MAC address
- Unlock sequence for user programming
- Operating Range:
- SPI Clock Speed up to 5MHz
- Operating Temperature Range: -40°C to +85°C.
- Packages include 10-Lead MSOP and TDFN
- Timekeeping
- MCP795Wxx Features
- Timekeeping
- Real-Time Clock/Calendar: Hours, Minutes, Seconds, Hundredth of Seconds, Day of Week, Month, Year, Leap Year
- Crystal Oscillator requires External 32,768 kHz Tuning Fork Crystal and Load Capacitors.
- Clock Out Function: 1Hz, 4.096kHz, 8.192kHz, 32.768kHz
- 32kHz Boot-up Clock at Power-up (MCP795BXX)
- 2 Programmable Alarms - Supports IRQ or WDO
- Programmable open-drain output - Alarm or Interrupt
- On-Chip Digital Trimming/Calibration: +/255PPM range in 1PPM steps
- Power-Fail Time-Stamp @ Battery Switchover: Logs time when VCC fails and VCC is restored
- Low-Power
- Wide Operating Voltage:
- VCC: 1.8V to 5.5V
- VBAT: 1.3V to 5.5V
- Low Operating Current:
- VCC Standby Current <1uA @ 3V
- VBAT Timekeeping Current: <700nA @ 1.8V
- Automatic Battery Switchover from VCC to VBAT: Backup power for timekeeping and SRAM retention
- User Memory
- 64Byte Battery-Backed SRAM
- 2Kbit and 1 Kbit EEPROM Memory
- 128-Bit Unique ID in Protected Area of EEPROM:
- Available blank or preprogrammed
- EUI-48™ or EUI-64™ MAC address
- Unlock sequence for user programming
- Operating Temperature Range:
-40°C to +85°C. - Packages include 14-Lead SOIC and TSSOP
- Timekeeping
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Features the MCP79510 real time clock/calculator with backup power, SPI, and programmable interrupt.