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Name: DS1689S
Brand: Analog Devices Inc./Maxim Integrated
SKU: DS1689S
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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Analog Devices Inc./Maxim Integrated DS1689S

Part No.:: DS1689S

Manufacturer:: Analog Devices Inc./Maxim Integrated

Package:: 28-SOIC (0.337, 8.56mm Width)

Datasheet:: DS1689S.pdf

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

In Stock:: 3752

Quantity:: Add To Cart

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DS1689S Specifications

Package/Case:
28-SOIC (0.337, 8.56mm Width)
Packaging:
Tube
Series:
-
ProductStatus:
Obsolete
Type:
Clock/Calendar
Features:
NVSRAM
MemorySize:
114B
TimeFormat:
HH:MM:SS (12/24 hr)
DateFormat:
YY-MM-DD-dd
Interface:
Parallel
Voltage-Supply:
2.7V ~ 3.3V, 4.5V ~ 5.5V
Voltage-SupplyBattery:
2.5V ~ 3.7V
Current-Timekeeping(Max):
2mA @ 3V, 3mA @ 5V
OperatingTemperature:
0°C ~ 70°C
MountingType:
Surface Mount

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DS1689S information

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Basic introduction and simple engineering application of DS1689S

DS1689S is a versatile real-time clock (RTC) chip commonly used in embedded systems for timekeeping and scheduling applications. It features a battery backup, alarm functions, and a temperature-compensated crystal oscillator (TCXO) for accurate timekeeping.

Application Scenario:

In a simple project, DS1689S can be utilized to create a digital clock with alarm functionality, suitable for educational purposes or as a basic timekeeping device for beginners.

Circuit Design:

To build a digital clock using DS1689S, follow these steps:

1. Component Connection:

Connect DS1689S to the microcontroller's I2C bus. Ensure proper pull-up resistors are connected to the SDA and SCL lines for reliable communication.

2. Power Supply:

Provide power to DS1689S using a stable voltage source. Ensure that the power supply meets the chip's voltage requirements and is properly decoupled to minimize noise.

3. Crystal Oscillator:

Connect an external crystal oscillator to DS1689S to ensure accurate timekeeping. Follow the datasheet recommendations for the crystal's frequency and load capacitance.

4. Alarm Configuration:

Configure the alarm registers of DS1689S to trigger an interrupt or toggle an output pin when a specific time is reached. This can be done through the microcontroller's firmware.

5. User Interface:

Integrate a user interface, such as a 7-segment LED display or an LCD screen, to show the current time and alarm settings. Utilize the microcontroller's GPIO pins to drive the display components.

Experiment Steps:

Step 1: Connect DS1689S to your microcontroller's I2C bus according to the datasheet pinout.

Step 2: Power up the circuit and ensure that DS1689S is receiving the correct voltage levels.

Step 3: Write firmware code to initialize DS1689S and set the current time and alarm settings.

Step 4: Implement a routine to continuously read the time from DS1689S and update the display.

Step 5: Test the alarm functionality by setting an alarm time and verifying that the alarm triggers as expected.

Considerations:

- Power Backup: Implement a backup power source, such as a coin cell battery, to ensure that DS1689S retains timekeeping data during power outages.

- Firmware Optimization: Write efficient firmware code to minimize power consumption and ensure smooth operation of the clock.

- User Interaction: Design a user-friendly interface to set the time and alarm settings easily, considering the limitations of the chosen display and input devices.

- Accuracy Calibration: Calibrate the clock periodically to account for any drift in the crystal oscillator's frequency and maintain accurate timekeeping.

DS1689S FAQ

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6. What is the process for return or replacement of DS1689S?

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 DS1689S we delivered, we will accept the replacement or return of the DS1689S 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 DS1689S.

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

Two processes to return the products:

(1)Inform us within 90 days

(2)Obtain Requesting Return Authorizations