Microchip Technology, Inc. Enhanced Feature Battery-Backed SPI Real-Time Clock/Calendar en556378

Description
The MCP795W11 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 that is preprogrammed with a 48-bit MAC Address that 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 off-loading MCU functions and allowing it to sleep for longer periods of time. Additional Features Full Featured RTCC targets smart energy, communications and home appliance applications. Low Power Operation VCC Min = 1.8V Icc < 1 µA Typical Standby Current Low Backup Power 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) Dual configurable alarms with a 0.01 sec count on one alarm IRQ (VCC or VBAT) WDO (VCC) 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 Watchdog Timer - Dual Retriggers SPI Bus or EVHS digital input Dual Configurable Event Detects High speed with programmable pulse count (EVHS) Low speed with programmable debounce delay (EVLS) EEPROM has 8 Bytes/Page with Block Sector write protection Protect: None, 1/4, 1/2 or all of array Unique ID is factory programmed with MAC Address
  • Enhanced Feature Battery-Backed SPI Real-Time Clock/Calendar - en556378 - Microchip Technology, Inc.
    Microchip Technology, Inc.
Description
The MCP795W11 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 that is preprogrammed with a 48-bit MAC Address that 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 off-loading MCU functions and allowing it to sleep for longer periods of time. Additional Features Full Featured RTCC targets smart energy, communications and home appliance applications. Low Power Operation VCC Min = 1.8V Icc < 1 µA Typical Standby Current Low Backup Power 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) Dual configurable alarms with a 0.01 sec count on one alarm IRQ (VCC or VBAT) WDO (VCC) 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 Watchdog Timer - Dual Retriggers SPI Bus or EVHS digital input Dual Configurable Event Detects High speed with programmable pulse count (EVHS) Low speed with programmable debounce delay (EVLS) EEPROM has 8 Bytes/Page with Block Sector write protection Protect: None, 1/4, 1/2 or all of array Unique ID is factory programmed with MAC Address
Datasheet
Datasheet Summary
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The MCP795WXX is a battery-backed SPI real-time clock/calendar (RTCC) designed for low-power applications. It operates within a voltage range of 1.8V to 3.6V and features a backup voltage range of 1.3V to 3.6V. The device maintains accurate timekeeping with features such as leap year compensation, dual programmable alarms, and a clock output function with selectable frequencies. It supports SPI communication at clock rates up to 5 MHz and includes on-chip digital trimming for frequency adjustments with a resolution of ±1 ppm. The MCP795WXX incorporates a power-fail timestamp to log transitions between main power and battery backup, ensuring data integrity during power interruptions. It also features 64 bytes of battery-backed SRAM and 1 Kbit or 2 Kbit EEPROM with software write protection and a robust unlock sequence for critical data storage. Enhanced functionalities include a programmable watchdog timer and dual configurable event detect modules for pulse counting and switch debouncing, which can help improve system robustness by offloading tasks from the microcontroller. The device is available in 14-lead SOIC and TSSOP packages, making it suitable for various applications in smart energy, communications, and home appliances.

Datasheet Summary
Powered by GS/AI

The MCP795WXX is a battery-backed SPI real-time clock/calendar (RTCC) designed for low-power applications. It operates within a voltage range of 1.8V to 3.6V and features a backup voltage range of 1.3V to 3.6V. The device maintains accurate timekeeping with features such as leap year compensation, dual programmable alarms, and a clock output function with selectable frequencies. It supports SPI communication at clock rates up to 5 MHz and includes on-chip digital trimming for frequency adjustments with a resolution of ±1 ppm. The MCP795WXX incorporates a power-fail timestamp to log transitions between main power and battery backup, ensuring data integrity during power interruptions. It also features 64 bytes of battery-backed SRAM and 1 Kbit or 2 Kbit EEPROM with software write protection and a robust unlock sequence for critical data storage. Enhanced functionalities include a programmable watchdog timer and dual configurable event detect modules for pulse counting and switch debouncing, which can help improve system robustness by offloading tasks from the microcontroller. The device is available in 14-lead SOIC and TSSOP packages, making it suitable for various applications in smart energy, communications, and home appliances.

Suppliers

Company
Product
Description
Supplier Links
Enhanced Feature Battery-Backed SPI Real-Time Clock/Calendar - en556378 - Microchip Technology, Inc.
Microchip Technology, Inc.
Chandler, AZ, United States
Enhanced Feature Battery-Backed SPI Real-Time Clock/Calendar
en556378
Enhanced Feature Battery-Backed SPI Real-Time Clock/Calendar en556378
The MCP795W11 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 that is preprogrammed with a 48-bit MAC Address that 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 off-loading MCU functions and allowing it to sleep for longer periods of time. Additional Features Full Featured RTCC targets smart energy, communications and home appliance applications. Low Power Operation VCC Min = 1.8V Icc < 1 µA Typical Standby Current Low Backup Power 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) Dual configurable alarms with a 0.01 sec count on one alarm IRQ (VCC or VBAT) WDO (VCC) 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 Watchdog Timer - Dual Retriggers SPI Bus or EVHS digital input Dual Configurable Event Detects High speed with programmable pulse count (EVHS) Low speed with programmable debounce delay (EVLS) EEPROM has 8 Bytes/Page with Block Sector write protection Protect: None, 1/4, 1/2 or all of array Unique ID is factory programmed with MAC Address

The MCP795W11 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 that is preprogrammed with a 48-bit MAC Address that 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 off-loading MCU functions and allowing it to sleep for longer periods of time.

Additional Features

      Full Featured RTCC targets smart energy, communications and home appliance applications.
    • Low Power Operation
      • VCC Min = 1.8V
      • Icc < 1 µA Typical Standby Current
    • Low Backup Power
      • 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)
    • Dual configurable alarms with a 0.01 sec count on one alarm
      • IRQ (VCC or VBAT)
      • WDO (VCC)
    • 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
    • Watchdog Timer - Dual Retriggers
      • SPI Bus or EVHS digital input
    • Dual Configurable Event Detects
      • High speed with programmable pulse count (EVHS)
      • Low speed with programmable debounce delay (EVLS)
    • EEPROM has 8 Bytes/Page with Block Sector write protection
      • Protect: None, 1/4, 1/2 or all of array
    • Unique ID is factory programmed with MAC Address
Supplier's Site Datasheet

Technical Specifications

  Microchip Technology, Inc.
Product Category IC Clocks
Product Number en556378
Product Name Enhanced Feature Battery-Backed SPI Real-Time Clock/Calendar
Device Type Real Time Clock
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