What is the Additional Feature ?

Name: BQ4845P-A4
Brand: Texas Instruments
SKU: BQ4845P-A4
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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Texas Instruments BQ4845P-A4

Part No.:: BQ4845P-A4

Manufacturer:: Texas Instruments

Package:: 28-DIP (0.600, 15.24mm)

Datasheet:: BQ4845P-A4.pdf

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

In Stock:: 7042

Quantity:: Add To Cart

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BQ4845P-A4 Specifications

Package/Case:
28-DIP (0.600, 15.24mm)
Packaging:
Tube,Tube
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:
0°C ~ 70°C
MountingType:
Through Hole

BQ4845P-A4 this integrated circuit is available in factory sealed anti static packs. at icwhale.com. Please read product page below detail information. including BQ4845P-A4 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 BQ4845P-A4 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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BQ4845P-A4 information

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Basic introduction and simple engineering application of BQ4845P-A4

BQ4845P-A4 is a real-time clock (RTC) chip commonly used in electronic projects and embedded systems for timekeeping and timestamping functionalities. It offers accurate timekeeping capabilities and convenient interfacing options.

Application Scenario:

In a digital alarm clock project, BQ4845P-A4 can be utilized to provide accurate timekeeping functionality, ensuring the clock displays the correct time and triggers alarms at the desired intervals.

Circuit Design:

To create a digital alarm clock using BQ4845P-A4, follow these steps:

1. RTC Connection:

Connect BQ4845P-A4 to the microcontroller or single-board computer (SBC) using the I2C or SPI communication interface. Ensure proper wiring and configure the communication protocol according to the datasheet specifications.

2. Time Display:

Connect a digital display, such as an LCD or LED display, to the microcontroller to show the current time obtained from BQ4845P-A4. Utilize appropriate GPIO pins for interfacing with the display module.

3. Alarm Functionality:

Implement alarm functionality in the microcontroller firmware using the timekeeping data provided by BQ4845P-A4. Set alarm triggers based on specific time intervals or user-defined schedules.

4. User Interface:

Integrate user interface elements, such as buttons or a touchscreen, to allow users to set alarms, adjust time settings, and interact with the clock. Configure GPIO pins to detect user input and update alarm settings accordingly.

5. Power Supply:

Ensure a stable power supply to BQ4845P-A4 and the microcontroller to maintain accurate timekeeping and prevent data loss during power outages. Use voltage regulators and capacitors for proper power management.

Experiment Steps:

Step 1: RTC Interfacing

Connect BQ4845P-A4 to the microcontroller using I2C communication. Refer to the datasheet for pinout and wiring details. Make sure to provide appropriate pull-up resistors for the I2C bus.

Step 2: Time Display

Connect an LCD display to the microcontroller. Write firmware code to read the time from BQ4845P-A4 and display it on the LCD screen.

Step 3: Alarm Setup

Implement alarm functionality in the microcontroller firmware. Allow users to set alarm times using buttons or a touchscreen interface.

Step 4: User Interaction

Integrate user interface components, such as buttons or a touchscreen, to enable user interaction with the alarm clock. Implement features like setting alarms and adjusting time settings.

Step 5: Power Management

Ensure proper power supply to BQ4845P-A4 and the microcontroller. Test the alarm clock under different power conditions, including power loss scenarios, to verify data retention and timekeeping accuracy.

Considerations:

When designing the alarm clock circuit, consider factors such as:

- Power Consumption: Optimize the firmware and hardware design to minimize power consumption and prolong battery life, if applicable.

- Alarm Accuracy: Test the alarm triggering mechanism to ensure it operates reliably and accurately according to the set schedules.

- User Experience: Design the user interface for ease of use and intuitive operation, considering factors like button layout and menu navigation.

- Clock Accuracy: Calibrate BQ4845P-A4 periodically to maintain accurate timekeeping, considering factors like temperature drift and clock drift over time.

- Error Handling: Implement error handling routines in the firmware to handle communication errors or data corruption scenarios gracefully.

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6. What is the process for return or replacement of BQ4845P-A4?

All goods will implement Pre-Shipment Inspection (PSI), selected at random from all batches of your order to do a systematic inspection before arranging the shipment. If there is something wrong with the BQ4845P-A4 we delivered, we will accept the replacement or return of the BQ4845P-A4 only when all of the below conditions are fulfilled:

(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 BQ4845P-A4.

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

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