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Name: BQ4845S-A4NTRG4
Brand: Texas Instruments
SKU: BQ4845S-A4NTRG4
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Texas Instruments BQ4845S-A4NTRG4

Part No.:: BQ4845S-A4NTRG4

Manufacturer:: Texas Instruments

Package:: 28-SOIC (0.295, 7.50mm Width)

Datasheet:: BQ4845S-A4NTRG4.pdf

Description:: IC RTC CLK/CALENDAR PAR 28-SOIC

In Stock:: 2591

Quantity:: Add To Cart

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BQ4845S-A4NTRG4 Specifications

Package/Case:
28-SOIC (0.295, 7.50mm Width)
Packaging:
Tape & Reel (TR)
Series:
-
ProductStatus:
Obsolete
Type:
Clock/Calendar
Features:
Alarm, Daylight Savings, Leap Year, Supervisor, Watchdog Timer
MemorySize:
-
TimeFormat:
HH:MM:SS (12/24 hr)
DateFormat:
YY-MM-DD-dd
Interface:
Parallel
Voltage-Supply:
4.75V ~ 5.5V
Voltage-SupplyBattery:
2.3V ~ 4V
Current-Timekeeping(Max):
1.5mA (Typ) @ 4.5 V ~ 5.5 V
OperatingTemperature:
-40°C ~ 85°C
MountingType:
Surface Mount

BQ4845S-A4NTRG4 this integrated circuit is available in factory sealed anti static packs. at icwhale.com. Please read product page below detail information. including BQ4845S-A4NTRG4 price, data-sheet, in-stock availability, technical difficulties. Also. Quickly Enter the access of compare listing to find out replaceable electronic parts. If you want to retrieve comprehensive data for BQ4845S-A4NTRG4 to optimize the supply chain (including cross references, life-cycle, parametric, counterfeit risk, obsolescence managements forecasts), please contact to our Tech-supports team.

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BQ4845S-A4NTRG4 information

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Basic introduction and simple engineering application of BQ4845S-A4NTRG4

BQ4845S-A4NTRG4 is a real-time clock (RTC) chip designed for various electronic applications, providing accurate timekeeping and calendar functions. It integrates a crystal oscillator circuit, battery backup, and serial interface for easy integration into microcontroller-based systems.

Application Scenario:

In a digital alarm clock project, BQ4845S-A4NTRG4 can be utilized to track time and trigger alarm events at specific times.

Circuit Design:

To create a digital alarm clock using BQ4845S-A4NTRG4, follow these steps:

1. RTC Integration:

Connect the BQ4845S-A4NTRG4 chip to the microcontroller's I2C/SPI bus for communication. Ensure proper pull-up resistors are connected to the SDA and SCL lines for reliable communication.

2. Time Setting:

Implement firmware code on the microcontroller to initialize the RTC chip and set the current time and date. Utilize the RTC's registers to configure time parameters, including hours, minutes, and seconds.

3. Alarm Configuration:

Define alarm settings using the RTC's alarm registers. Set the desired alarm time and date when the alarm event should trigger. Configure the alarm interrupt to alert the microcontroller when the specified time is reached.

4. User Interface:

Design a user interface using a display module, such as an LCD or OLED screen, to show the current time and alarm settings. Utilize the microcontroller's GPIO pins to interface with the display and control user inputs, such as setting the alarm time.

5. Alarm Output:

Connect an alarm output device, such as a buzzer or LED, to the microcontroller's GPIO pins. When the alarm event occurs, trigger the GPIO pin to activate the alarm, providing an audible or visual alert to the user.

Considerations:

When designing the digital alarm clock, consider the following:

- Power Management: Ensure proper power supply to both the microcontroller and BQ4845S-A4NTRG4 chip, including battery backup for maintaining timekeeping during power outages.

- Alarm Accuracy: Test the alarm triggering accuracy under various conditions to ensure reliable operation and timely alerts.

- User Interface Design: Create an intuitive user interface for setting the alarm time and navigating through different functionalities.

- Low Power Consumption: Optimize firmware code and hardware design to minimize power consumption, extending the battery life in portable applications.

- Error Handling: Implement error detection and handling mechanisms to address communication errors or RTC chip malfunctions, ensuring system robustness and reliability.

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6. What is the process for return or replacement of BQ4845S-A4NTRG4?

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(1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.

(2)We are informed of the defect described above within 90 days after the delivery of BQ4845S-A4NTRG4.

(3)The PartNo is unused and only in the original unpacked packaging.

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