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Name: DS1687-5
Brand: Analog Devices Inc./Maxim Integrated
SKU: DS1687-5
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 DS1687-5

Part No.:: DS1687-5

Manufacturer:: Analog Devices Inc./Maxim Integrated

Package:: 24-DIP Module (0.600, 15.24mm)

Datasheet:: DS1687-5.pdf

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

In Stock:: 2044

Quantity:: Add To Cart

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DS1687-5 Specifications

Package/Case:
24-DIP Module (0.600, 15.24mm)
Packaging:
Tube,Tube
Series:
-
ProductStatus:
Obsolete
Type:
Clock/Calendar
Features:
Alarm, NVSRAM, Square Wave Output, Y2K
MemorySize:
242B
TimeFormat:
HH:MM:SS (12/24 hr)
DateFormat:
YY-MM-DD-dd
Interface:
Parallel
Voltage-Supply:
4.5V ~ 5.5V
Voltage-SupplyBattery:
2.5V ~ 3.7V
Current-Timekeeping(Max):
3mA @ 5V
OperatingTemperature:
0°C ~ 70°C
MountingType:
Through Hole

DS1687-5 this integrated circuit is available in factory sealed anti static packs. at icwhale.com. Please read product page below detail information. including DS1687-5 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 DS1687-5 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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DS1687-5 information

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DS1687-5 Typical application Circuitry

DS1687-5

The DS1687-5 is a sophisticated Real-Time Clock (RTC) chip designed by Maxim Integrated, equipped with integrated NV (non-volatile) SRAM. It's engineered to offer precise timekeeping capabilities alongside battery-backed SRAM storage, making it an ideal choice for maintaining critical data and time information during power losses. The device is specifically tailored for applications requiring durable and reliable time tracking and data retention without constant power.

Key Features and Parameters:

- Comprehensive Timekeeping Functions: Tracks hours, minutes, seconds, days, dates, months, and years, with leap year compensation.

- Battery-Backed SRAM: Provides NV storage for critical data, ensuring information persistence during power outages.

- Integrated Crystal Oscillator: Facilitates high-precision time measurement without the need for external timing components.

- Programmable Alarm Function: Allows for setting alarms, useful in scheduling tasks or triggering events based on specific time criteria.

- Industrial Temperature Rating: The device operates reliably across a wide temperature range, suitable for demanding environments.

Application Scenario – Data Logging System for Research Stations:

In remote research stations, such as those monitoring environmental conditions or wildlife activity, the DS1687-5 can be pivotal in data logging systems. It ensures accurate timestamps for each data entry and preserves system configurations and log data during power downtimes.

Detailed Circuit Connection:

1. Power Supply Integration:

- Main Supply (VCC, Pin 24): Connect to a stable 5V power source. Attach a decoupling capacitor (e.g., 0.1 µF) near the pin to filter noise from the power supply.

- Battery Backup (VBACK, Pin 20): Link to a high-quality lithium battery. This connection is critical for maintaining the RTC and SRAM functionality when external power is unavailable.

2. Memory and Time Management:

- Data Bus (D0-D7, Pins 1-8): Interface these pins directly with the microcontroller's data bus for seamless data exchange regarding time and stored information.

- Address Lines (A0-A12, distributed across various pins): Employ these pins to designate specific memory addresses within the SRAM, allowing for organized data storage and retrieval.

3. Operational Control Signals:

- Read (RD, Pin 22) and Write (WR, Pin 23): Connect these active-low controls to the microcontroller to manage data flow directions-reading from or writing to the SRAM.

- Chip Enable (CE, Pin 26): This active-low pin triggers the DS1687-5's operation when pulled low, integrating it into the system's active components.

4. External Oscillator Configuration:

- Crystal Connections (X1 and X2, Pins 15 and 16): Attach a 32.768 kHz crystal oscillator. It's essential to optimize the load capacitors for this oscillator to ensure accurate timekeeping.

5. Alarm and Interrupts:

- Interrupt Request (IRQ, Pin 13): Utilize this output to connect to an interrupt pin on the microcontroller, enabling prompt responses to set alarms or other timed events dictated by the DS1687-5.

Design Considerations:

- Battery Selection and Monitoring: Opt for a battery with a known and reliable discharge rate. Implementing a monitoring circuit can help predict battery replacement times.

- Signal Integrity and Isolation: Given the sensitivity of timekeeping and memory operations, ensuring minimal interference from adjacent circuitry is paramount. Employing isolation techniques can mitigate potential disruptions.

- Environmental Adaptability: Given the DS1687-5's industrial rating, placing it within a system that might experience variable temperatures requires careful consideration of thermal management to maintain accuracy.

- Firmware Compatibility: Crafting firmware that can intelligently interact with the DS1687-5, especially regarding time setting, alarm configurations, and data management, is crucial for leveraging all functionalities efficiently.

Embedding the DS1687-5 within a data logging system for remote research stations illustrates its indispensable role in enhancing data integrity and operational reliability. This setup not only ensures accurate time stamps for each recorded datum but also guarantees the persistence of vital log information and configurations, thereby bolstering the research station's data collection capabilities.

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6. What is the process for return or replacement of DS1687-5?

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 DS1687-5 we delivered, we will accept the replacement or return of the DS1687-5 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 DS1687-5.

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

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(1)Inform us within 90 days

(2)Obtain Requesting Return Authorizations