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Name: MCP795W21-I/ST
Brand: Microchip Technology
SKU: MCP795W21-I/ST
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Any Feature, including a modified Existing Feature, that is not an Existing Feature.

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Microchip Technology MCP795W21-I/ST

Part No.:: MCP795W21-I/ST

Manufacturer:: Microchip Technology

Package:: 14-TSSOP (0.173, 4.40mm Width)

Datasheet:: MCP795W21-I/ST.pdf

Description:: IC RTC CLK/CALENDAR SPI 14-TSSOP

In Stock:: 3324

Quantity:: Add To Cart

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Basic introduction and simple engineering application of MCP795W21-I/ST

MCP795W21-I/ST is a real-time clock (RTC) module manufactured by Microchip Technology, offering precise timekeeping functionality for a wide range of applications. It features low-power operation, battery backup, and I2C interface for easy integration into embedded systems.

Application Scenario:

In electronic projects requiring accurate timekeeping, MCP795W21-I/ST can be utilized to timestamp events, schedule tasks, or maintain time-sensitive data logs.

Circuit Design:

To incorporate MCP795W21-I/ST into a simple project, follow these steps:

1. Module Connection:

Connect the MCP795W21-I/ST module to your microcontroller or development board. Make sure to establish proper connections for power (VDD, VSS), I2C communication lines (SDA, SCL), and optional battery backup (VBAT).

2. Initialization:

Initialize the I2C interface on your microcontroller to communicate with the MCP795W21-I/ST. Send commands to configure the RTC settings, such as setting the time and date, enabling alarms, or selecting the clock output frequency.

3. Timekeeping:

Utilize the MCP795W21-I/ST to keep track of time in your project. Read the current time and date registers periodically to synchronize your system's operations or display the time on an external interface.

4. Alarm Functionality:

Implement alarm features provided by MCP795W21-I/ST to trigger specific actions at predefined times. Configure alarm registers and set corresponding interrupt routines in your firmware to respond to alarm events.

5. Backup Power:

If continuous timekeeping is crucial for your application, connect a backup battery to the VBAT pin of MCP795W21-I/ST. This ensures uninterrupted operation in case of main power loss.

Considerations:

When working with MCP795W21-I/ST, keep in mind the following considerations:

- I2C Communication: Ensure proper pull-up resistors are used on the SDA and SCL lines for reliable communication with the microcontroller.

- Battery Life: Choose a suitable backup battery with sufficient capacity to maintain timekeeping during power outages or low-power scenarios.

- Interrupt Handling: Implement interrupt service routines (ISRs) in your firmware to handle RTC alarms or periodic time updates efficiently.

- Accuracy Calibration: Periodically calibrate the MCP795W21-I/ST to compensate for any drift in timekeeping accuracy over extended usage.

- Power Consumption: Optimize power management in your system to minimize the overall power consumption, especially when operating on battery backup.

MCP795W21-I/ST information

MCP795W21-I/ST Specifications

Package/Case:
14-TSSOP (0.173, 4.40mm Width)
Packaging:
Tube
Series:
-
ProductStatus:
Active
Type:
Clock/Calendar
Features:
Alarm, EEPROM, Leap Year, Square Wave Output, SRAM, Unique ID, Watchdog Timer
MemorySize:
64B
TimeFormat:
HH:MM:SS:hh (12/24 hr)
DateFormat:
YY-MM-DD-dd
Interface:
SPI
Voltage-Supply:
1.8V ~ 3.6V
Voltage-SupplyBattery:
1.3V ~ 3.6V
Current-Timekeeping(Max):
1µA @ 1.8V ~ 5.5V
OperatingTemperature:
-40°C ~ 85°C
MountingType:
Surface Mount

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6. What is the process for return or replacement of MCP795W21-I/ST?

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