SPI Real-Time Clock/Calendars

Microchip offers low-cost, accurate timekeeping over a wide temperature range, power-failure monitoring and on-chip nonvolatile memory

Microchip SPI Real-Time Clock/Calendars Microchip announces the expansion of its stand-alone Real-Time Clock/Calendar (RTCC) portfolio with the 10-pin, SPI MCP795XX family. These devices offer many of the same features as the larger 14-pin MCP795WXX family, including superior timekeeping performance.

Reducing overall component count in the system and eliminating the user programming costs for a serial ID makes the MCP795XX RTCC family an ideal choice for the handheld, wireless and consumer markets. By including 64 bytes of SRAM, 2 Kbits of EEPROM and a 128-bit Unique ID, which can be ordered blank or preprogrammed with a MAC address, extra memory devices may not be needed. Utility power meters, manufacturing equipment, radios, GPS and hospital instrumentation applications that need accurate time over a broad temperature range will also benefit from the very wide digital trimming range, which can compensate up to 22 seconds per day for crystal frequency drift. MCP795XX Datasheet

  Features
  • Low power operation
  • Low backup power
  • Automatic battery switchover with timestamp
  • Dual configurable alarms with a 0.01 sec count on one alarm
  • Clock out frequencies: 32.768, 8.192, and 4.096 KHz, and 1 Hz
  • Digital trimming range from -255 to + 255 ppm in 1 ppm steps
  • EEPROM has 8 bytes/page with block sector write protection
  • Factory standard MAC address programming or custom ID available

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Microchip
Part Number		 Digi-Key
Part Number		 Description  
MCP79510-I/MS MCP79510-I/MS-ND IC RTCC SPI 64B SRAM 10-MSOP MCP795xx Datasheet
MCP79511-I/MS MCP79511-I/MS-ND IC RTCC SPI 64B SRAM 10-MSOP
MCP79512-I/MS MCP79512-I/MS-ND IC RTCC SPI 64B SRAM 10-MSOP
MCP79520-I/MS MCP79520-I/MS-ND IC RTCC SPI 64B SRAM 10-MSOP
MCP79521-I/MS MCP79521-I/MS-ND IC RTCC SPI 64B SRAM 10-MSOP
MCP79522-I/MS MCP79522-I/MS-ND IC RTCC SPI 64B SRAM 10-MSOP
MCP795W10-I/SL MCP795W10-I/SL-ND IC RTCC 64B SRAM WD/DET 14SOIC MCP795xx Datasheet
MCP795W10-I/ST MCP795W10-I/ST-ND IC RTCC 64B SRAM WD/DET 14TSSOP
MCP795W11-I/SL MCP795W11-I/SL-ND IC RTCC 64B SRAM WD/DET 14SOIC
MCP795W11-I/ST MCP795W11-I/ST-ND IC RTCC 64B SRAM WD/DET 14TSSOP
MCP795W12-I/SL MCP795W12-I/SL-ND IC RTCC 64B SRAM WD/DET 14SOIC
MCP795W12-I/ST MCP795W12-I/ST-ND IC RTCC 64B SRAM WD/DET 14TSSOP
MCP795W20-I/SL MCP795W20-I/SL-ND IC RTCC 64B SRAM WD/DET 14SOIC
MCP795W20-I/ST MCP795W20-I/ST-ND IC RTCC 64B SRAM WD/DET 14TSSOP
MCP795W21-I/SL MCP795W21-I/SL-ND IC RTCC 64B SRAM WD/DET 14SOIC
MCP795W21-I/ST MCP795W21-I/ST-ND IC RTCC 64B SRAM WD/DET 14TSSOP
MCP795W22-I/SL MCP795W22-I/SL-ND IC RTCC 64B SRAM WD/DET 14SOIC
MCP795W22-I/ST MCP795W22-I/ST-ND IC RTCC 64B SRAM WD/DET 14TSSOP

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