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Name: BQ3285LFSS-A1TR
Brand: Texas Instruments
SKU: BQ3285LFSS-A1TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Texas Instruments BQ3285LFSS-A1TR

Part No.:: BQ3285LFSS-A1TR

Manufacturer:: Texas Instruments

Package:: 24-SSOP (0.154, 3.90mm Width)

Datasheet:: BQ3285LFSS-A1TR.pdf

Description:: IC RTC CLK/CALENDAR PAR 24-QSOP

In Stock:: 10000

Quantity:: Add To Cart

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BQ3285LFSS-A1TR Specifications

Package/Case:
24-SSOP (0.154, 3.90mm Width)
Packaging:
Tape & Reel (TR),Bulk
Series:
-
ProductStatus:
Obsolete
Type:
Clock/Calendar
Features:
Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output
MemorySize:
242B
TimeFormat:
HH:MM:SS (12/24 hr)
DateFormat:
YY-MM-DD-dd
Interface:
Parallel
Voltage-Supply:
2.7V ~ 5.5V
Voltage-SupplyBattery:
2.4V ~ 4V
Current-Timekeeping(Max):
100µA @ 3V
OperatingTemperature:
0°C ~ 70°C
MountingType:
Surface Mount

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BQ3285LFSS-A1TR information

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Basic introduction and simple engineering application of BQ3285LFSS-A1TR

BQ3285LFSS-A1TR is a real-time clock (RTC) IC commonly used in electronic systems for timekeeping and timestamping applications. It features a low-power consumption design, high accuracy, and integrated battery backup, making it suitable for a wide range of embedded projects.

Application Scenario:

In a digital alarm clock project, BQ3285LFSS-A1TR can be utilized to provide accurate timekeeping functionality, allowing the clock to maintain the correct time even during power outages.

Circuit Design:

To create a digital alarm clock using BQ3285LFSS-A1TR, follow these steps:

1. RTC Connection:

Connect the BQ3285LFSS-A1TR RTC IC to the microcontroller, such as an Arduino or Raspberry Pi, using the I2C interface. Ensure proper wiring and configure the microcontroller to communicate with the RTC module.

2. Time Display:

Integrate a display module, such as an OLED or LCD screen, to visualize the current time. Utilize the microcontroller's GPIO pins to interface with the display and update the time information retrieved from BQ3285LFSS-A1TR.

3. Alarm Functionality:

Implement alarm functionality using the RTC's alarm registers. Configure the desired alarm time and date, and program the microcontroller to trigger specific actions, such as activating a buzzer or turning on LEDs, when the alarm condition is met.

4. User Interface:

Include user input interfaces, such as buttons or rotary encoders, to set the alarm time and control other clock settings. Use GPIO pins to read input signals and adjust the alarm parameters accordingly.

5. Power Management:

Ensure proper power supply to both the microcontroller and BQ3285LFSS-A1TR. Utilize voltage regulators and decoupling capacitors to maintain stable operation and protect against voltage fluctuations.

Experiment Steps:

To familiarize yourself with the BQ3285LFSS-A1TR RTC module, follow these experimental steps:

1. Setup:

Connect the BQ3285LFSS-A1TR RTC module to an Arduino Uno board using the I2C interface. Ensure proper wiring, with SDA connected to A4 and SCL connected to A5 on the Arduino.

2. Initialization:

Write a simple Arduino sketch to initialize the RTC module and set the current time. Use the Wire library to communicate with the RTC via I2C, and set the time registers accordingly.

3. Time Readout:

Modify the Arduino sketch to continuously read the time from the BQ3285LFSS-A1TR RTC module and display it on the serial monitor. Verify that the time displayed matches the actual time.

4. Alarm Setup:

Implement an alarm setup function in the Arduino sketch, allowing you to set a specific alarm time. Use the alarm registers of the RTC module to configure the desired alarm time and date.

5. Alarm Trigger:

Test the alarm functionality by setting the alarm time to a few minutes ahead. Ensure that the Arduino triggers the alarm when the specified time is reached, activating a buzzer or LED as an indicator.

Considerations:

When working with BQ3285LFSS-A1TR and designing the alarm clock circuit, consider the following:

- Backup Battery: Ensure the backup battery for the RTC module is properly connected and provides sufficient power to maintain timekeeping during power outages.

- Accuracy: Verify the accuracy of the RTC module by comparing the displayed time with an external reference, such as an internet-connected device or a GPS receiver.

- Power Consumption: Optimize the power consumption of the alarm clock circuit to prolong battery life, especially in battery-powered applications.

- User Experience: Design the user interface of the alarm clock to be intuitive and easy to use, considering factors such as button layout and feedback mechanisms.

- Testing: Thoroughly test the alarm clock circuit under various conditions to ensure reliable operation and accurate timekeeping over extended periods.

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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 BQ3285LFSS-A1TR.

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

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