DS1387
Real Time Clock, Non-Volatile, 1 Timer(s), CMOS, PDIP24,DS1387
Real Time Clock, Non-Volatile, 1 Timer(s), CMOS, PDIP24,
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Manufacturer Part # : DS1387
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Package/Case: DIP-20
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Brand: Dallas Semiconductor
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Product Categories : Real Time Clocks
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Service & Packaging
Service & Packaging
About After Sales Service
All Parts Extended Quality Guarantee
Initiate the application within 90 days from the shipment date.
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DS1387 DataSheet

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Interested Parts
DS1387 Description
The DS1387 is a real-time clock (RTC) with an integrated crystal and battery backup for timekeeping, designed by Maxim Integrated Products.
Features
- Clock Accuracy: Offers ±2ppm accuracy from 0°C to 40°C for reliable timekeeping.
- Battery Backup: Provides power fail detection and backup for maintaining accurate timekeeping during power outages.
- Serial Interface: Features a serial interface for communication, allowing easy integration with other devices.
Applications
The DS1387 is commonly used in embedded systems requiring real-time clock functions, electronic devices with battery backup requirements, industrial automation applications, data logging systems, medical devices and equipment, automotive electronics, and test and measurement equipment.
Where to Use:
- Embedded systems
- Electronic devices with battery backup requirements
- Industrial automation applications
- Data logging systems
- Medical devices and equipment
- Automotive electronics
- Test and measurement equipment
Manufacturer
The DS1387 is manufactured by Maxim Integrated Products, a global leader in semiconductor technology.
This product was developed to meet the growing demand for reliable timekeeping and battery backup solutions in various industries, including industrial automation, medical devices, and automotive electronics.
Packages
The DS1387 comes in a 24-pin DIP package, making it suitable for compact circuit designs and easy integration with other components.
Specifications
The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.
Rohs Code | No | Part Life Cycle Code | Obsolete |
Additional Feature ! | DAYLIGHT SAVINGS OPTION; 10 YEARS DATA RETENTION | External Data Bus Width | 8 |
Information Access Method | PARALLEL, MUXED BUS | Interrupt Capability ! | Y |
JESD-30 Code | R-PDIP-T24 | JESD-609 Code | e0 |
Number of Terminals | 24 | Number of Timers | 1 |
On Chip Data RAM Width | 8 | Operating Temperature-Max | 70 °C |
Output Clock Frequency-Max | 0.008192 MHz | Package Body Material | PLASTIC/EPOXY |
Package Code | DIP | Package Equivalence Code | DIP24,.6 |
Package Shape | RECTANGULAR | Package Style | IN-LINE |
Power Supplies ! | 5 V | Qualification Status ! | Not Qualified |
RAM (words) | 50 | Supply Current-Max | 50 mA |
Supply Voltage-Max | 5.5 V | Supply Voltage-Min | 4.5 V |
Supply Voltage-Nom | 5 V | Surface Mount ! | NO |
Technology | CMOS | Temperature Grade ! | COMMERCIAL |
Terminal Finish | TIN LEAD | Terminal Form ! | THROUGH-HOLE |
Terminal Pitch ! | 2.54 mm | Terminal Position | DUAL |
Time-Min | SECONDS | Volatile | NO |
uPs/uCs/Peripheral ICs Type | TIMER, REAL TIME CLOCK |
Datasheet PDF
Datasheets record the features, absolute maximum ratings, applications and more of the device, which benefit a lot as an overall guide to the specific application of the part.
FAQs
What is DS1387?
The DS1387 is a low-current real-time clock (RTC) designed by Maxim Integrated. It is ideal for applications requiring timekeeping, calendar functions, and alarm capabilities, such as consumer electronics, industrial automation, and medical devices.
How Does DS1387 Work?
The DS1387 works by maintaining accurate timekeeping and calendar functions using an integrated oscillator and a small backup battery. It includes alarm functions and programmable interrupt outputs for system wake-up or timing control. The RTC communicates with the microcontroller or processor through an easy-to-implement I2C interface.
How Many Pins does DS1387 have and What are the Functions of the Pinout Configuration?
The DS1387 is housed in an 8-pin SOIC (Small Outline Integrated Circuit) package. The pinout configuration includes:
- VCC: Power supply pin.
- GND: Ground pin.
- SCL: Serial clock input pin for I2C communication.
- SDA: Serial data input/output pin for I2C communication.
- X1, X2: Crystal connections for the integrated oscillator.
- IRQ: Programmable interrupt output pin.
What are the Pros and Cons of DS1387?
Pros:
- Accurate Timekeeping: Provides accurate time and calendar functions for various applications.
- Low Power Consumption: Operates with low current, suitable for battery-operated devices.
- Alarm Functions: Includes alarm capabilities for event scheduling or system wake-up.
- Small Package: The 8-pin SOIC package is space-efficient, suitable for compact designs.
- Easy Interface: Communicates with microcontrollers or processors using the widely used I2C interface.
Cons:
- Limited Features: May not include advanced functionalities present in higher-end RTCs.
- Backup Battery: Requires a backup battery for maintaining timekeeping during power off situations.
Are There Any Equivalents/Alternatives to DS1387 for Recommendation?
- The DS1307 from Maxim Integrated is a similar real-time clock with basic timekeeping and calendar features.
- Alternatives to the DS1387 include the MCP7940N from Microchip Technology and the PCF8563 from NXP Semiconductors.
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Price details
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