DS1284+

1 TIMER(S), REAL TIME CLOCK, PDIP28, 0.600 INCH, ROHS COMPLIANT, PLASTIC, DIP-28
7,860 Effective Inventory

DS1284+

Effective Inventory7,860

1 TIMER(S), REAL TIME CLOCK, PDIP28, 0.600 INCH, ROHS COMPLIANT, PLASTIC, DIP-28

  • Manufacturer Part # : DS1284+

  • Package/Case: PDIP-28

  • Brand: MAXIM

  • Product Categories : Real Time Clocks

Quality Assurance

Quality Assurance

All parts procured from our supply chain network undergo a rigorous incoming inspection process. This meticulous inspection ensures that the parts received by our customers are authentic and meet the required standards. Additionally, we maintain detailed records of these inspections to ensure transparency and traceability throughout the supply chain.

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Certification

We have successfully obtained various certification standards and have established our own professional testing laboratory. This ensures that every product we supply to our customers meets the highest quality standards. We adhere to strict testing protocols to maintain the consistency and accuracy of our products. To ensure that our products are original and genuine, we also collaborate with reputable third-party testing facilities to conduct rigorous quality testing. Our commitment to quality extends to meeting industry, legal, regulatory, and ISO 9001:2015 requirements.

Shipping & Payment

Shipping & Payment

About Shipping

We generally ship orders within a few business days through reliable shipping carriers such as FedEx, SF, UPS, or DHL. We also have support for other shipping methods. If you would like to inquire about specific shipping details or costs, please don't hesitate to reach out to us.

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About Payment

We accept various payment methods, including VISA, MasterCard, UnionPay, Western Union, PayPal, and other channels.

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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.

Confirm the return or exchange with our staff.

Maintain the goods in their original condition as received.

Lastly, please note that the eligibility for return or exchange of goods is subject to an assessment of the actual condition of the returned items. We will evaluate the received goods before finalizing the return or exchange process. If you have any inquiries or require further assistance regarding returns or exchanges, please don't hesitate to contact us at [email protected]

About packaging

Regarding packaging, our products are carefully packed in anti-static bags to provide ESD anti-static protection. The outer packaging is durable with secure closure. We support various packaging methods such as Tape and Reel, Cut Tape, Tube, or Tray.

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DS1284+ DataSheet
no-price

Current price plan is under preparation. Please contact our customer service team for the latest pricing information. Thank you for your understanding and support!

Rapid Quote

Please submit RFQ for DS1284+ or email to us: Email: [email protected], we will contact you in 12 hours.

Details

GENERAL DESCRIPTION The DS1284/DS1286 watchdog timekeepers are self-contained real-time clocks, alarms, watchdog timers, and interval timers in a 28-pin JEDEC DIP and encapsulated DIP package. The DS1286 contains an embedded lithium energy source and a quartz crystal, which eliminates the need for any external circuitry. The DS1284 requires an external quartz crystal and a VBAT source, which could be a lithium battery. Data contained within 64 8-bit registers can be read or written in the same manner as byte-wide static RAM. Data is maintained in the watchdog timekeeper by intelligent control circuitry that detects the status of VCC and write protects memory when VCC is out of tolerance. The lithiumFEATURES ƒ Keeps Track of Hundredths of Seconds, Seconds, Minutes, Hours, Days, Date of the Month, Months, and Years; Valid Leap Year Compensation Up to 2100 ƒ Watchdog Timer Restarts an Out-of-Control Processor ƒ Alarm Function Schedules Real-Time-Related Activities ƒ Embedded Lithium Energy Cell Maintains Time, Watchdog, User RAM, and Alarm Information ƒ Programmable Interrupts and Square-Wave Outputs Maintain JEDEC Footprint ƒ All Registers are Individually Addressable via the Address and Data Bus ƒ Accuracy is Better than ±1 Minute/Month at +25°C (EDIP) ƒ Greater than 10 Years of Timekeeping in the Absence of VCC ƒ 50 Bytes of User NV RAM ƒ Underwriters Laboratory (UL) Recognized ƒ -40°C to +85°C Industrial Temperature Range Option

Key Features

  • ƒ Keeps Track of Hundredths of Seconds, Seconds, Minutes, Hours, Days, Date of the Month, Months, and Years; Valid Leap Year Compensation Up to 2100
  • ƒ Watchdog Timer Restarts an Out-of-Control Processor
  • ƒ Alarm Function Schedules Real-Time-Related Activities
  • ƒ Embedded Lithium Energy Cell Maintains Time, Watchdog, User RAM, and Alarm Information
  • ƒ Programmable Interrupts and Square-Wave Outputs Maintain JEDEC Footprint
  • ƒ All Registers are Individually Addressable via the Address and Data Bus
  • ƒ Accuracy is Better than ±1 Minute/Month at +25°C (EDIP)
  • ƒ Greater than 10 Years of Timekeeping in the Absence of VCC
  • ƒ 50 Bytes of User NV RAM
  • ƒ Underwriters Laboratory (UL) Recognized
  • ƒ -40°C to +85°C Industrial Temperature Range Option

Specifications

The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.

Pbfree Code Yes Rohs Code Yes
Part Life Cycle Code Active Part Package Code DIP
Pin Count ! 28 Reach Compliance Code
Additional Feature ! ACCURACY 2 MIN/MONTH @ 25 DEGREE C; 1024 HZ FIXED O/P Clock Frequency-Max 0.032 MHz
External Data Bus Width 8 Information Access Method PARALLEL, DIRECT ADDRESS
JESD-30 Code R-PDIP-T28 JESD-609 Code e3
Length 36.83 mm Moisture Sensitivity Level NOT APPLICABLE
Number of Terminals 28 Number of Timers 1
Operating Temperature-Max 70 °C Operating Temperature-Min
Package Body Material PLASTIC/EPOXY Package Code DIP
Package Shape RECTANGULAR Package Style IN-LINE
Peak Reflow Temperature (Cel) 260 Qualification Status ! COMMERCIAL
Seated Height-Max 5.08 mm 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 MATTE TIN
Terminal Form ! THROUGH-HOLE Terminal Pitch ! 2.54 mm
Terminal Position DUAL Time@Peak Reflow Temperature-Max (s) NOT SPECIFIED
Width 15.24 mm 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.

Preliminary Specification DS1284+ PDF Download

FAQs

What is DS1284+?

The DS1284+ is a nonvolatile timekeeping RAM (NVTRAM) module designed by Maxim Integrated. It combines the functionality of a real-time clock (RTC) and nonvolatile memory, making it suitable for applications requiring timekeeping and data storage, such as industrial automation, medical devices, and consumer electronics.

How Does DS1284+ Work?

The DS1284+ works by providing timekeeping functions using the integrated RTC with battery backup, ensuring accurate timekeeping even during power interruptions. Additionally, it includes nonvolatile memory for data storage, allowing critical information to be retained across power cycles. The module communicates with the host microcontroller through a simple serial interface, enabling easy integration into existing systems.

How Many Pins does DS1284+ have and What are the Functions of the Pinout Configuration?

The DS1284+ is housed in a 28-pin SOIC (Small Outline Integrated Circuit) package. The pinout configuration includes:

  • VCC: Power supply pin.
  • GND: Ground pin.
  • CE, OE, WE: Control pins for chip enable, output enable, and write enable, respectively.
  • RTC Register Address/Data, RAM Address/Data: Serial interface pins for RTC and nonvolatile RAM communication.
  • VBAT: External battery input for RTC backup.

What are the Pros and Cons of DS1284+?

Pros:

  • Integrated Timekeeping and Memory: Provides both real-time clock and nonvolatile memory functions in a single module, reducing component count and board space.
  • Battery Backup: Ensures reliable timekeeping and data retention during power loss or system shutdown.
  • Simple Serial Interface: Easy integration with microcontrollers and other digital systems.
  • High Reliability: Designed for industrial and automotive applications with robust performance and data retention.

Cons:

  • Complexity: Configuring and managing nonvolatile memory may add complexity to the system firmware.
  • Cost: Integrated NVTRAM modules may have a higher cost compared to separate RTC and memory components.
  • Package Size: The 28-pin SOIC package may require more board space than smaller alternatives.

Are There Any Equivalents/Alternatives to DS1284+ for Recommendation?

  • The DS1744 from Maxim Integrated offers similar NVTRAM functionality with additional features.
  • Alternatives to the DS1284+ include the M41ST87W from STMicroelectronics and the MCP7940N from Microchip Technology.

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